[PATCH] ext4: rename ext4 symbols to avoid duplication of ext3 symbols

Mingming Cao originally did this work, and Shaggy reproduced it using some
scripts from her.

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

26 files changed, 3227 insertions, 3227 deletions

diff --git a/fs/ext4/Makefile b/fs/ext4/Makefile
index 704cd44..09c4878 100644
--- a/fs/ext4/Makefile
+++ b/fs/ext4/Makefile
@@ -1,12 +1,12 @@
 #
-# Makefile for the linux ext3-filesystem routines.
+# Makefile for the linux ext4-filesystem routines.
 #
 
-obj-$(CONFIG_EXT3_FS) += ext3.o
+obj-$(CONFIG_EXT4DEV_FS) += ext4dev.o
 
-ext3-y	:= balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o \
+ext4dev-y	:= balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o \
 	   ioctl.o namei.o super.o symlink.o hash.o resize.o
 
-ext3-$(CONFIG_EXT3_FS_XATTR)	 += xattr.o xattr_user.o xattr_trusted.o
-ext3-$(CONFIG_EXT3_FS_POSIX_ACL) += acl.o
-ext3-$(CONFIG_EXT3_FS_SECURITY)	 += xattr_security.o
+ext4dev-$(CONFIG_EXT4DEV_FS_XATTR)	+= xattr.o xattr_user.o xattr_trusted.o
+ext4dev-$(CONFIG_EXT4DEV_FS_POSIX_ACL)	+= acl.o
+ext4dev-$(CONFIG_EXT4DEV_FS_SECURITY)	+= xattr_security.o
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index 1e5038d..d143489 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -1,5 +1,5 @@
 /*
- * linux/fs/ext3/acl.c
+ * linux/fs/ext4/acl.c
  *
  * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
  */
@@ -9,8 +9,8 @@
 #include <linux/slab.h>
 #include <linux/capability.h>
 #include <linux/fs.h>
-#include <linux/ext3_jbd.h>
-#include <linux/ext3_fs.h>
+#include <linux/ext4_jbd.h>
+#include <linux/ext4_fs.h>
 #include "xattr.h"
 #include "acl.h"
 
@@ -18,7 +18,7 @@
  * Convert from filesystem to in-memory representation.
  */
 static struct posix_acl *
-ext3_acl_from_disk(const void *value, size_t size)
+ext4_acl_from_disk(const void *value, size_t size)
 {
 	const char *end = (char *)value + size;
 	int n, count;
@@ -26,13 +26,13 @@ ext3_acl_from_disk(const void *value, size_t size)
 
 	if (!value)
 		return NULL;
-	if (size < sizeof(ext3_acl_header))
+	if (size < sizeof(ext4_acl_header))
 		 return ERR_PTR(-EINVAL);
-	if (((ext3_acl_header *)value)->a_version !=
-	    cpu_to_le32(EXT3_ACL_VERSION))
+	if (((ext4_acl_header *)value)->a_version !=
+	    cpu_to_le32(EXT4_ACL_VERSION))
 		return ERR_PTR(-EINVAL);
-	value = (char *)value + sizeof(ext3_acl_header);
-	count = ext3_acl_count(size);
+	value = (char *)value + sizeof(ext4_acl_header);
+	count = ext4_acl_count(size);
 	if (count < 0)
 		return ERR_PTR(-EINVAL);
 	if (count == 0)
@@ -41,9 +41,9 @@ ext3_acl_from_disk(const void *value, size_t size)
 	if (!acl)
 		return ERR_PTR(-ENOMEM);
 	for (n=0; n < count; n++) {
-		ext3_acl_entry *entry =
-			(ext3_acl_entry *)value;
-		if ((char *)value + sizeof(ext3_acl_entry_short) > end)
+		ext4_acl_entry *entry =
+			(ext4_acl_entry *)value;
+		if ((char *)value + sizeof(ext4_acl_entry_short) > end)
 			goto fail;
 		acl->a_entries[n].e_tag  = le16_to_cpu(entry->e_tag);
 		acl->a_entries[n].e_perm = le16_to_cpu(entry->e_perm);
@@ -53,13 +53,13 @@ ext3_acl_from_disk(const void *value, size_t size)
 			case ACL_MASK:
 			case ACL_OTHER:
 				value = (char *)value +
-					sizeof(ext3_acl_entry_short);
+					sizeof(ext4_acl_entry_short);
 				acl->a_entries[n].e_id = ACL_UNDEFINED_ID;
 				break;
 
 			case ACL_USER:
 			case ACL_GROUP:
-				value = (char *)value + sizeof(ext3_acl_entry);
+				value = (char *)value + sizeof(ext4_acl_entry);
 				if ((char *)value > end)
 					goto fail;
 				acl->a_entries[n].e_id =
@@ -83,21 +83,21 @@ fail:
  * Convert from in-memory to filesystem representation.
  */
 static void *
-ext3_acl_to_disk(const struct posix_acl *acl, size_t *size)
+ext4_acl_to_disk(const struct posix_acl *acl, size_t *size)
 {
-	ext3_acl_header *ext_acl;
+	ext4_acl_header *ext_acl;
 	char *e;
 	size_t n;
 
-	*size = ext3_acl_size(acl->a_count);
-	ext_acl = kmalloc(sizeof(ext3_acl_header) + acl->a_count *
-			sizeof(ext3_acl_entry), GFP_KERNEL);
+	*size = ext4_acl_size(acl->a_count);
+	ext_acl = kmalloc(sizeof(ext4_acl_header) + acl->a_count *
+			sizeof(ext4_acl_entry), GFP_KERNEL);
 	if (!ext_acl)
 		return ERR_PTR(-ENOMEM);
-	ext_acl->a_version = cpu_to_le32(EXT3_ACL_VERSION);
-	e = (char *)ext_acl + sizeof(ext3_acl_header);
+	ext_acl->a_version = cpu_to_le32(EXT4_ACL_VERSION);
+	e = (char *)ext_acl + sizeof(ext4_acl_header);
 	for (n=0; n < acl->a_count; n++) {
-		ext3_acl_entry *entry = (ext3_acl_entry *)e;
+		ext4_acl_entry *entry = (ext4_acl_entry *)e;
 		entry->e_tag  = cpu_to_le16(acl->a_entries[n].e_tag);
 		entry->e_perm = cpu_to_le16(acl->a_entries[n].e_perm);
 		switch(acl->a_entries[n].e_tag) {
@@ -105,14 +105,14 @@ ext3_acl_to_disk(const struct posix_acl *acl, size_t *size)
 			case ACL_GROUP:
 				entry->e_id =
 					cpu_to_le32(acl->a_entries[n].e_id);
-				e += sizeof(ext3_acl_entry);
+				e += sizeof(ext4_acl_entry);
 				break;
 
 			case ACL_USER_OBJ:
 			case ACL_GROUP_OBJ:
 			case ACL_MASK:
 			case ACL_OTHER:
-				e += sizeof(ext3_acl_entry_short);
+				e += sizeof(ext4_acl_entry_short);
 				break;
 
 			default:
@@ -127,12 +127,12 @@ fail:
 }
 
 static inline struct posix_acl *
-ext3_iget_acl(struct inode *inode, struct posix_acl **i_acl)
+ext4_iget_acl(struct inode *inode, struct posix_acl **i_acl)
 {
-	struct posix_acl *acl = EXT3_ACL_NOT_CACHED;
+	struct posix_acl *acl = EXT4_ACL_NOT_CACHED;
 
 	spin_lock(&inode->i_lock);
-	if (*i_acl != EXT3_ACL_NOT_CACHED)
+	if (*i_acl != EXT4_ACL_NOT_CACHED)
 		acl = posix_acl_dup(*i_acl);
 	spin_unlock(&inode->i_lock);
 
@@ -140,11 +140,11 @@ ext3_iget_acl(struct inode *inode, struct posix_acl **i_acl)
 }
 
 static inline void
-ext3_iset_acl(struct inode *inode, struct posix_acl **i_acl,
+ext4_iset_acl(struct inode *inode, struct posix_acl **i_acl,
                   struct posix_acl *acl)
 {
 	spin_lock(&inode->i_lock);
-	if (*i_acl != EXT3_ACL_NOT_CACHED)
+	if (*i_acl != EXT4_ACL_NOT_CACHED)
 		posix_acl_release(*i_acl);
 	*i_acl = posix_acl_dup(acl);
 	spin_unlock(&inode->i_lock);
@@ -156,9 +156,9 @@ ext3_iset_acl(struct inode *inode, struct posix_acl **i_acl,
  * inode->i_mutex: don't care
  */
 static struct posix_acl *
-ext3_get_acl(struct inode *inode, int type)
+ext4_get_acl(struct inode *inode, int type)
 {
-	struct ext3_inode_info *ei = EXT3_I(inode);
+	struct ext4_inode_info *ei = EXT4_I(inode);
 	int name_index;
 	char *value = NULL;
 	struct posix_acl *acl;
@@ -169,31 +169,31 @@ ext3_get_acl(struct inode *inode, int type)
 
 	switch(type) {
 		case ACL_TYPE_ACCESS:
-			acl = ext3_iget_acl(inode, &ei->i_acl);
-			if (acl != EXT3_ACL_NOT_CACHED)
+			acl = ext4_iget_acl(inode, &ei->i_acl);
+			if (acl != EXT4_ACL_NOT_CACHED)
 				return acl;
-			name_index = EXT3_XATTR_INDEX_POSIX_ACL_ACCESS;
+			name_index = EXT4_XATTR_INDEX_POSIX_ACL_ACCESS;
 			break;
 
 		case ACL_TYPE_DEFAULT:
-			acl = ext3_iget_acl(inode, &ei->i_default_acl);
-			if (acl != EXT3_ACL_NOT_CACHED)
+			acl = ext4_iget_acl(inode, &ei->i_default_acl);
+			if (acl != EXT4_ACL_NOT_CACHED)
 				return acl;
-			name_index = EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT;
+			name_index = EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT;
 			break;
 
 		default:
 			return ERR_PTR(-EINVAL);
 	}
-	retval = ext3_xattr_get(inode, name_index, "", NULL, 0);
+	retval = ext4_xattr_get(inode, name_index, "", NULL, 0);
 	if (retval > 0) {
 		value = kmalloc(retval, GFP_KERNEL);
 		if (!value)
 			return ERR_PTR(-ENOMEM);
-		retval = ext3_xattr_get(inode, name_index, "", value, retval);
+		retval = ext4_xattr_get(inode, name_index, "", value, retval);
 	}
 	if (retval > 0)
-		acl = ext3_acl_from_disk(value, retval);
+		acl = ext4_acl_from_disk(value, retval);
 	else if (retval == -ENODATA || retval == -ENOSYS)
 		acl = NULL;
 	else
@@ -203,11 +203,11 @@ ext3_get_acl(struct inode *inode, int type)
 	if (!IS_ERR(acl)) {
 		switch(type) {
 			case ACL_TYPE_ACCESS:
-				ext3_iset_acl(inode, &ei->i_acl, acl);
+				ext4_iset_acl(inode, &ei->i_acl, acl);
 				break;
 
 			case ACL_TYPE_DEFAULT:
-				ext3_iset_acl(inode, &ei->i_default_acl, acl);
+				ext4_iset_acl(inode, &ei->i_default_acl, acl);
 				break;
 		}
 	}
@@ -217,13 +217,13 @@ ext3_get_acl(struct inode *inode, int type)
 /*
  * Set the access or default ACL of an inode.
  *
- * inode->i_mutex: down unless called from ext3_new_inode
+ * inode->i_mutex: down unless called from ext4_new_inode
  */
 static int
-ext3_set_acl(handle_t *handle, struct inode *inode, int type,
+ext4_set_acl(handle_t *handle, struct inode *inode, int type,
 	     struct posix_acl *acl)
 {
-	struct ext3_inode_info *ei = EXT3_I(inode);
+	struct ext4_inode_info *ei = EXT4_I(inode);
 	int name_index;
 	void *value = NULL;
 	size_t size = 0;
@@ -234,7 +234,7 @@ ext3_set_acl(handle_t *handle, struct inode *inode, int type,
 
 	switch(type) {
 		case ACL_TYPE_ACCESS:
-			name_index = EXT3_XATTR_INDEX_POSIX_ACL_ACCESS;
+			name_index = EXT4_XATTR_INDEX_POSIX_ACL_ACCESS;
 			if (acl) {
 				mode_t mode = inode->i_mode;
 				error = posix_acl_equiv_mode(acl, &mode);
@@ -242,7 +242,7 @@ ext3_set_acl(handle_t *handle, struct inode *inode, int type,
 					return error;
 				else {
 					inode->i_mode = mode;
-					ext3_mark_inode_dirty(handle, inode);
+					ext4_mark_inode_dirty(handle, inode);
 					if (error == 0)
 						acl = NULL;
 				}
@@ -250,7 +250,7 @@ ext3_set_acl(handle_t *handle, struct inode *inode, int type,
 			break;
 
 		case ACL_TYPE_DEFAULT:
-			name_index = EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT;
+			name_index = EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT;
 			if (!S_ISDIR(inode->i_mode))
 				return acl ? -EACCES : 0;
 			break;
@@ -259,23 +259,23 @@ ext3_set_acl(handle_t *handle, struct inode *inode, int type,
 			return -EINVAL;
 	}
 	if (acl) {
-		value = ext3_acl_to_disk(acl, &size);
+		value = ext4_acl_to_disk(acl, &size);
 		if (IS_ERR(value))
 			return (int)PTR_ERR(value);
 	}
 
-	error = ext3_xattr_set_handle(handle, inode, name_index, "",
+	error = ext4_xattr_set_handle(handle, inode, name_index, "",
 				      value, size, 0);
 
 	kfree(value);
 	if (!error) {
 		switch(type) {
 			case ACL_TYPE_ACCESS:
-				ext3_iset_acl(inode, &ei->i_acl, acl);
+				ext4_iset_acl(inode, &ei->i_acl, acl);
 				break;
 
 			case ACL_TYPE_DEFAULT:
-				ext3_iset_acl(inode, &ei->i_default_acl, acl);
+				ext4_iset_acl(inode, &ei->i_default_acl, acl);
 				break;
 		}
 	}
@@ -283,9 +283,9 @@ ext3_set_acl(handle_t *handle, struct inode *inode, int type,
 }
 
 static int
-ext3_check_acl(struct inode *inode, int mask)
+ext4_check_acl(struct inode *inode, int mask)
 {
-	struct posix_acl *acl = ext3_get_acl(inode, ACL_TYPE_ACCESS);
+	struct posix_acl *acl = ext4_get_acl(inode, ACL_TYPE_ACCESS);
 
 	if (IS_ERR(acl))
 		return PTR_ERR(acl);
@@ -299,26 +299,26 @@ ext3_check_acl(struct inode *inode, int mask)
 }
 
 int
-ext3_permission(struct inode *inode, int mask, struct nameidata *nd)
+ext4_permission(struct inode *inode, int mask, struct nameidata *nd)
 {
-	return generic_permission(inode, mask, ext3_check_acl);
+	return generic_permission(inode, mask, ext4_check_acl);
 }
 
 /*
- * Initialize the ACLs of a new inode. Called from ext3_new_inode.
+ * Initialize the ACLs of a new inode. Called from ext4_new_inode.
  *
  * dir->i_mutex: down
  * inode->i_mutex: up (access to inode is still exclusive)
  */
 int
-ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
+ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
 {
 	struct posix_acl *acl = NULL;
 	int error = 0;
 
 	if (!S_ISLNK(inode->i_mode)) {
 		if (test_opt(dir->i_sb, POSIX_ACL)) {
-			acl = ext3_get_acl(dir, ACL_TYPE_DEFAULT);
+			acl = ext4_get_acl(dir, ACL_TYPE_DEFAULT);
 			if (IS_ERR(acl))
 				return PTR_ERR(acl);
 		}
@@ -330,7 +330,7 @@ ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
 		mode_t mode;
 
 		if (S_ISDIR(inode->i_mode)) {
-			error = ext3_set_acl(handle, inode,
+			error = ext4_set_acl(handle, inode,
 					     ACL_TYPE_DEFAULT, acl);
 			if (error)
 				goto cleanup;
@@ -346,7 +346,7 @@ ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
 			inode->i_mode = mode;
 			if (error > 0) {
 				/* This is an extended ACL */
-				error = ext3_set_acl(handle, inode,
+				error = ext4_set_acl(handle, inode,
 						     ACL_TYPE_ACCESS, clone);
 			}
 		}
@@ -372,7 +372,7 @@ cleanup:
  * inode->i_mutex: down
  */
 int
-ext3_acl_chmod(struct inode *inode)
+ext4_acl_chmod(struct inode *inode)
 {
 	struct posix_acl *acl, *clone;
         int error;
@@ -381,7 +381,7 @@ ext3_acl_chmod(struct inode *inode)
 		return -EOPNOTSUPP;
 	if (!test_opt(inode->i_sb, POSIX_ACL))
 		return 0;
-	acl = ext3_get_acl(inode, ACL_TYPE_ACCESS);
+	acl = ext4_get_acl(inode, ACL_TYPE_ACCESS);
 	if (IS_ERR(acl) || !acl)
 		return PTR_ERR(acl);
 	clone = posix_acl_clone(acl, GFP_KERNEL);
@@ -394,17 +394,17 @@ ext3_acl_chmod(struct inode *inode)
 		int retries = 0;
 
 	retry:
-		handle = ext3_journal_start(inode,
-				EXT3_DATA_TRANS_BLOCKS(inode->i_sb));
+		handle = ext4_journal_start(inode,
+				EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
 		if (IS_ERR(handle)) {
 			error = PTR_ERR(handle);
-			ext3_std_error(inode->i_sb, error);
+			ext4_std_error(inode->i_sb, error);
 			goto out;
 		}
-		error = ext3_set_acl(handle, inode, ACL_TYPE_ACCESS, clone);
-		ext3_journal_stop(handle);
+		error = ext4_set_acl(handle, inode, ACL_TYPE_ACCESS, clone);
+		ext4_journal_stop(handle);
 		if (error == -ENOSPC &&
-		    ext3_should_retry_alloc(inode->i_sb, &retries))
+		    ext4_should_retry_alloc(inode->i_sb, &retries))
 			goto retry;
 	}
 out:
@@ -416,7 +416,7 @@ out:
  * Extended attribute handlers
  */
 static size_t
-ext3_xattr_list_acl_access(struct inode *inode, char *list, size_t list_len,
+ext4_xattr_list_acl_access(struct inode *inode, char *list, size_t list_len,
 			   const char *name, size_t name_len)
 {
 	const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS);
@@ -429,7 +429,7 @@ ext3_xattr_list_acl_access(struct inode *inode, char *list, size_t list_len,
 }
 
 static size_t
-ext3_xattr_list_acl_default(struct inode *inode, char *list, size_t list_len,
+ext4_xattr_list_acl_default(struct inode *inode, char *list, size_t list_len,
 			    const char *name, size_t name_len)
 {
 	const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT);
@@ -442,7 +442,7 @@ ext3_xattr_list_acl_default(struct inode *inode, char *list, size_t list_len,
 }
 
 static int
-ext3_xattr_get_acl(struct inode *inode, int type, void *buffer, size_t size)
+ext4_xattr_get_acl(struct inode *inode, int type, void *buffer, size_t size)
 {
 	struct posix_acl *acl;
 	int error;
@@ -450,7 +450,7 @@ ext3_xattr_get_acl(struct inode *inode, int type, void *buffer, size_t size)
 	if (!test_opt(inode->i_sb, POSIX_ACL))
 		return -EOPNOTSUPP;
 
-	acl = ext3_get_acl(inode, type);
+	acl = ext4_get_acl(inode, type);
 	if (IS_ERR(acl))
 		return PTR_ERR(acl);
 	if (acl == NULL)
@@ -462,25 +462,25 @@ ext3_xattr_get_acl(struct inode *inode, int type, void *buffer, size_t size)
 }
 
 static int
-ext3_xattr_get_acl_access(struct inode *inode, const char *name,
+ext4_xattr_get_acl_access(struct inode *inode, const char *name,
 			  void *buffer, size_t size)
 {
 	if (strcmp(name, "") != 0)
 		return -EINVAL;
-	return ext3_xattr_get_acl(inode, ACL_TYPE_ACCESS, buffer, size);
+	return ext4_xattr_get_acl(inode, ACL_TYPE_ACCESS, buffer, size);
 }
 
 static int
-ext3_xattr_get_acl_default(struct inode *inode, const char *name,
+ext4_xattr_get_acl_default(struct inode *inode, const char *name,
 			   void *buffer, size_t size)
 {
 	if (strcmp(name, "") != 0)
 		return -EINVAL;
-	return ext3_xattr_get_acl(inode, ACL_TYPE_DEFAULT, buffer, size);
+	return ext4_xattr_get_acl(inode, ACL_TYPE_DEFAULT, buffer, size);
 }
 
 static int
-ext3_xattr_set_acl(struct inode *inode, int type, const void *value,
+ext4_xattr_set_acl(struct inode *inode, int type, const void *value,
 		   size_t size)
 {
 	handle_t *handle;
@@ -505,12 +505,12 @@ ext3_xattr_set_acl(struct inode *inode, int type, const void *value,
 		acl = NULL;
 
 retry:
-	handle = ext3_journal_start(inode, EXT3_DATA_TRANS_BLOCKS(inode->i_sb));
+	handle = ext4_journal_start(inode, EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
-	error = ext3_set_acl(handle, inode, type, acl);
-	ext3_journal_stop(handle);
-	if (error == -ENOSPC && ext3_should_retry_alloc(inode->i_sb, &retries))
+	error = ext4_set_acl(handle, inode, type, acl);
+	ext4_journal_stop(handle);
+	if (error == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
 		goto retry;
 
 release_and_out:
@@ -519,33 +519,33 @@ release_and_out:
 }
 
 static int
-ext3_xattr_set_acl_access(struct inode *inode, const char *name,
+ext4_xattr_set_acl_access(struct inode *inode, const char *name,
 			  const void *value, size_t size, int flags)
 {
 	if (strcmp(name, "") != 0)
 		return -EINVAL;
-	return ext3_xattr_set_acl(inode, ACL_TYPE_ACCESS, value, size);
+	return ext4_xattr_set_acl(inode, ACL_TYPE_ACCESS, value, size);
 }
 
 static int
-ext3_xattr_set_acl_default(struct inode *inode, const char *name,
+ext4_xattr_set_acl_default(struct inode *inode, const char *name,
 			   const void *value, size_t size, int flags)
 {
 	if (strcmp(name, "") != 0)
 		return -EINVAL;
-	return ext3_xattr_set_acl(inode, ACL_TYPE_DEFAULT, value, size);
+	return ext4_xattr_set_acl(inode, ACL_TYPE_DEFAULT, value, size);
 }
 
-struct xattr_handler ext3_xattr_acl_access_handler = {
+struct xattr_handler ext4_xattr_acl_access_handler = {
 	.prefix	= POSIX_ACL_XATTR_ACCESS,
-	.list	= ext3_xattr_list_acl_access,
-	.get	= ext3_xattr_get_acl_access,
-	.set	= ext3_xattr_set_acl_access,
+	.list	= ext4_xattr_list_acl_access,
+	.get	= ext4_xattr_get_acl_access,
+	.set	= ext4_xattr_set_acl_access,
 };
 
-struct xattr_handler ext3_xattr_acl_default_handler = {
+struct xattr_handler ext4_xattr_acl_default_handler = {
 	.prefix	= POSIX_ACL_XATTR_DEFAULT,
-	.list	= ext3_xattr_list_acl_default,
-	.get	= ext3_xattr_get_acl_default,
-	.set	= ext3_xattr_set_acl_default,
+	.list	= ext4_xattr_list_acl_default,
+	.get	= ext4_xattr_get_acl_default,
+	.set	= ext4_xattr_set_acl_default,
 };
diff --git a/fs/ext4/acl.h b/fs/ext4/acl.h
index 0d1e627..26a5c1a 100644
--- a/fs/ext4/acl.h
+++ b/fs/ext4/acl.h
@@ -1,81 +1,81 @@
 /*
-  File: fs/ext3/acl.h
+  File: fs/ext4/acl.h
 
   (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>
 */
 
 #include <linux/posix_acl_xattr.h>
 
-#define EXT3_ACL_VERSION	0x0001
+#define EXT4_ACL_VERSION	0x0001
 
 typedef struct {
 	__le16		e_tag;
 	__le16		e_perm;
 	__le32		e_id;
-} ext3_acl_entry;
+} ext4_acl_entry;
 
 typedef struct {
 	__le16		e_tag;
 	__le16		e_perm;
-} ext3_acl_entry_short;
+} ext4_acl_entry_short;
 
 typedef struct {
 	__le32		a_version;
-} ext3_acl_header;
+} ext4_acl_header;
 
-static inline size_t ext3_acl_size(int count)
+static inline size_t ext4_acl_size(int count)
 {
 	if (count <= 4) {
-		return sizeof(ext3_acl_header) +
-		       count * sizeof(ext3_acl_entry_short);
+		return sizeof(ext4_acl_header) +
+		       count * sizeof(ext4_acl_entry_short);
 	} else {
-		return sizeof(ext3_acl_header) +
-		       4 * sizeof(ext3_acl_entry_short) +
-		       (count - 4) * sizeof(ext3_acl_entry);
+		return sizeof(ext4_acl_header) +
+		       4 * sizeof(ext4_acl_entry_short) +
+		       (count - 4) * sizeof(ext4_acl_entry);
 	}
 }
 
-static inline int ext3_acl_count(size_t size)
+static inline int ext4_acl_count(size_t size)
 {
 	ssize_t s;
-	size -= sizeof(ext3_acl_header);
-	s = size - 4 * sizeof(ext3_acl_entry_short);
+	size -= sizeof(ext4_acl_header);
+	s = size - 4 * sizeof(ext4_acl_entry_short);
 	if (s < 0) {
-		if (size % sizeof(ext3_acl_entry_short))
+		if (size % sizeof(ext4_acl_entry_short))
 			return -1;
-		return size / sizeof(ext3_acl_entry_short);
+		return size / sizeof(ext4_acl_entry_short);
 	} else {
-		if (s % sizeof(ext3_acl_entry))
+		if (s % sizeof(ext4_acl_entry))
 			return -1;
-		return s / sizeof(ext3_acl_entry) + 4;
+		return s / sizeof(ext4_acl_entry) + 4;
 	}
 }
 
-#ifdef CONFIG_EXT3_FS_POSIX_ACL
+#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
 
-/* Value for inode->u.ext3_i.i_acl and inode->u.ext3_i.i_default_acl
+/* Value for inode->u.ext4_i.i_acl and inode->u.ext4_i.i_default_acl
    if the ACL has not been cached */
-#define EXT3_ACL_NOT_CACHED ((void *)-1)
+#define EXT4_ACL_NOT_CACHED ((void *)-1)
 
 /* acl.c */
-extern int ext3_permission (struct inode *, int, struct nameidata *);
-extern int ext3_acl_chmod (struct inode *);
-extern int ext3_init_acl (handle_t *, struct inode *, struct inode *);
+extern int ext4_permission (struct inode *, int, struct nameidata *);
+extern int ext4_acl_chmod (struct inode *);
+extern int ext4_init_acl (handle_t *, struct inode *, struct inode *);
 
-#else  /* CONFIG_EXT3_FS_POSIX_ACL */
+#else  /* CONFIG_EXT4DEV_FS_POSIX_ACL */
 #include <linux/sched.h>
-#define ext3_permission NULL
+#define ext4_permission NULL
 
 static inline int
-ext3_acl_chmod(struct inode *inode)
+ext4_acl_chmod(struct inode *inode)
 {
 	return 0;
 }
 
 static inline int
-ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
+ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
 {
 	return 0;
 }
-#endif  /* CONFIG_EXT3_FS_POSIX_ACL */
+#endif  /* CONFIG_EXT4DEV_FS_POSIX_ACL */
 
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index b41a7d7..357e4e5 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -1,5 +1,5 @@
 /*
- *  linux/fs/ext3/balloc.c
+ *  linux/fs/ext4/balloc.c
  *
  * Copyright (C) 1992, 1993, 1994, 1995
  * Remy Card (card@masi.ibp.fr)
@@ -15,8 +15,8 @@
 #include <linux/capability.h>
 #include <linux/fs.h>
 #include <linux/jbd.h>
-#include <linux/ext3_fs.h>
-#include <linux/ext3_jbd.h>
+#include <linux/ext4_fs.h>
+#include <linux/ext4_jbd.h>
 #include <linux/quotaops.h>
 #include <linux/buffer_head.h>
 
@@ -32,30 +32,30 @@
  * The file system contains group descriptors which are located after the
  * super block.  Each descriptor contains the number of the bitmap block and
  * the free blocks count in the block.  The descriptors are loaded in memory
- * when a file system is mounted (see ext3_read_super).
+ * when a file system is mounted (see ext4_read_super).
  */
 
 
 #define in_range(b, first, len)	((b) >= (first) && (b) <= (first) + (len) - 1)
 
 /**
- * ext3_get_group_desc() -- load group descriptor from disk
+ * ext4_get_group_desc() -- load group descriptor from disk
  * @sb:			super block
  * @block_group:	given block group
  * @bh:			pointer to the buffer head to store the block
  *			group descriptor
  */
-struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
+struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
 					     unsigned int block_group,
 					     struct buffer_head ** bh)
 {
 	unsigned long group_desc;
 	unsigned long offset;
-	struct ext3_group_desc * desc;
-	struct ext3_sb_info *sbi = EXT3_SB(sb);
+	struct ext4_group_desc * desc;
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
 
 	if (block_group >= sbi->s_groups_count) {
-		ext3_error (sb, "ext3_get_group_desc",
+		ext4_error (sb, "ext4_get_group_desc",
 			    "block_group >= groups_count - "
 			    "block_group = %d, groups_count = %lu",
 			    block_group, sbi->s_groups_count);
@@ -64,17 +64,17 @@ struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
 	}
 	smp_rmb();
 
-	group_desc = block_group >> EXT3_DESC_PER_BLOCK_BITS(sb);
-	offset = block_group & (EXT3_DESC_PER_BLOCK(sb) - 1);
+	group_desc = block_group >> EXT4_DESC_PER_BLOCK_BITS(sb);
+	offset = block_group & (EXT4_DESC_PER_BLOCK(sb) - 1);
 	if (!sbi->s_group_desc[group_desc]) {
-		ext3_error (sb, "ext3_get_group_desc",
+		ext4_error (sb, "ext4_get_group_desc",
 			    "Group descriptor not loaded - "
 			    "block_group = %d, group_desc = %lu, desc = %lu",
 			     block_group, group_desc, offset);
 		return NULL;
 	}
 
-	desc = (struct ext3_group_desc *) sbi->s_group_desc[group_desc]->b_data;
+	desc = (struct ext4_group_desc *) sbi->s_group_desc[group_desc]->b_data;
 	if (bh)
 		*bh = sbi->s_group_desc[group_desc];
 	return desc + offset;
@@ -93,15 +93,15 @@ struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
 static struct buffer_head *
 read_block_bitmap(struct super_block *sb, unsigned int block_group)
 {
-	struct ext3_group_desc * desc;
+	struct ext4_group_desc * desc;
 	struct buffer_head * bh = NULL;
 
-	desc = ext3_get_group_desc (sb, block_group, NULL);
+	desc = ext4_get_group_desc (sb, block_group, NULL);
 	if (!desc)
 		goto error_out;
 	bh = sb_bread(sb, le32_to_cpu(desc->bg_block_bitmap));
 	if (!bh)
-		ext3_error (sb, "read_block_bitmap",
+		ext4_error (sb, "read_block_bitmap",
 			    "Cannot read block bitmap - "
 			    "block_group = %d, block_bitmap = %u",
 			    block_group, le32_to_cpu(desc->bg_block_bitmap));
@@ -134,7 +134,7 @@ static void __rsv_window_dump(struct rb_root *root, int verbose,
 			      const char *fn)
 {
 	struct rb_node *n;
-	struct ext3_reserve_window_node *rsv, *prev;
+	struct ext4_reserve_window_node *rsv, *prev;
 	int bad;
 
 restart:
@@ -144,7 +144,7 @@ restart:
 
 	printk("Block Allocation Reservation Windows Map (%s):\n", fn);
 	while (n) {
-		rsv = list_entry(n, struct ext3_reserve_window_node, rsv_node);
+		rsv = list_entry(n, struct ext4_reserve_window_node, rsv_node);
 		if (verbose)
 			printk("reservation window 0x%p "
 			       "start:  %lu, end:  %lu\n",
@@ -196,13 +196,13 @@ restart:
  * otherwise, return 0;
  */
 static int
-goal_in_my_reservation(struct ext3_reserve_window *rsv, ext3_grpblk_t grp_goal,
+goal_in_my_reservation(struct ext4_reserve_window *rsv, ext4_grpblk_t grp_goal,
 			unsigned int group, struct super_block * sb)
 {
-	ext3_fsblk_t group_first_block, group_last_block;
+	ext4_fsblk_t group_first_block, group_last_block;
 
-	group_first_block = ext3_group_first_block_no(sb, group);
-	group_last_block = group_first_block + (EXT3_BLOCKS_PER_GROUP(sb) - 1);
+	group_first_block = ext4_group_first_block_no(sb, group);
+	group_last_block = group_first_block + (EXT4_BLOCKS_PER_GROUP(sb) - 1);
 
 	if ((rsv->_rsv_start > group_last_block) ||
 	    (rsv->_rsv_end < group_first_block))
@@ -222,17 +222,17 @@ goal_in_my_reservation(struct ext3_reserve_window *rsv, ext3_grpblk_t grp_goal,
  * if the goal is not in any window.
  * Returns NULL if there are no windows or if all windows start after the goal.
  */
-static struct ext3_reserve_window_node *
-search_reserve_window(struct rb_root *root, ext3_fsblk_t goal)
+static struct ext4_reserve_window_node *
+search_reserve_window(struct rb_root *root, ext4_fsblk_t goal)
 {
 	struct rb_node *n = root->rb_node;
-	struct ext3_reserve_window_node *rsv;
+	struct ext4_reserve_window_node *rsv;
 
 	if (!n)
 		return NULL;
 
 	do {
-		rsv = rb_entry(n, struct ext3_reserve_window_node, rsv_node);
+		rsv = rb_entry(n, struct ext4_reserve_window_node, rsv_node);
 
 		if (goal < rsv->rsv_start)
 			n = n->rb_left;
@@ -249,33 +249,33 @@ search_reserve_window(struct rb_root *root, ext3_fsblk_t goal)
 	 */
 	if (rsv->rsv_start > goal) {
 		n = rb_prev(&rsv->rsv_node);
-		rsv = rb_entry(n, struct ext3_reserve_window_node, rsv_node);
+		rsv = rb_entry(n, struct ext4_reserve_window_node, rsv_node);
 	}
 	return rsv;
 }
 
 /**
- * ext3_rsv_window_add() -- Insert a window to the block reservation rb tree.
+ * ext4_rsv_window_add() -- Insert a window to the block reservation rb tree.
  * @sb:			super block
  * @rsv:		reservation window to add
  *
  * Must be called with rsv_lock hold.
  */
-void ext3_rsv_window_add(struct super_block *sb,
-		    struct ext3_reserve_window_node *rsv)
+void ext4_rsv_window_add(struct super_block *sb,
+		    struct ext4_reserve_window_node *rsv)
 {
-	struct rb_root *root = &EXT3_SB(sb)->s_rsv_window_root;
+	struct rb_root *root = &EXT4_SB(sb)->s_rsv_window_root;
 	struct rb_node *node = &rsv->rsv_node;
-	ext3_fsblk_t start = rsv->rsv_start;
+	ext4_fsblk_t start = rsv->rsv_start;
 
 	struct rb_node ** p = &root->rb_node;
 	struct rb_node * parent = NULL;
-	struct ext3_reserve_window_node *this;
+	struct ext4_reserve_window_node *this;
 
 	while (*p)
 	{
 		parent = *p;
-		this = rb_entry(parent, struct ext3_reserve_window_node, rsv_node);
+		this = rb_entry(parent, struct ext4_reserve_window_node, rsv_node);
 
 		if (start < this->rsv_start)
 			p = &(*p)->rb_left;
@@ -292,7 +292,7 @@ void ext3_rsv_window_add(struct super_block *sb,
 }
 
 /**
- * ext3_rsv_window_remove() -- unlink a window from the reservation rb tree
+ * ext4_rsv_window_remove() -- unlink a window from the reservation rb tree
  * @sb:			super block
  * @rsv:		reservation window to remove
  *
@@ -301,59 +301,59 @@ void ext3_rsv_window_add(struct super_block *sb,
  * rsv_lock hold.
  */
 static void rsv_window_remove(struct super_block *sb,
-			      struct ext3_reserve_window_node *rsv)
+			      struct ext4_reserve_window_node *rsv)
 {
-	rsv->rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
-	rsv->rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
+	rsv->rsv_start = EXT4_RESERVE_WINDOW_NOT_ALLOCATED;
+	rsv->rsv_end = EXT4_RESERVE_WINDOW_NOT_ALLOCATED;
 	rsv->rsv_alloc_hit = 0;
-	rb_erase(&rsv->rsv_node, &EXT3_SB(sb)->s_rsv_window_root);
+	rb_erase(&rsv->rsv_node, &EXT4_SB(sb)->s_rsv_window_root);
 }
 
 /*
  * rsv_is_empty() -- Check if the reservation window is allocated.
  * @rsv:		given reservation window to check
  *
- * returns 1 if the end block is EXT3_RESERVE_WINDOW_NOT_ALLOCATED.
+ * returns 1 if the end block is EXT4_RESERVE_WINDOW_NOT_ALLOCATED.
  */
-static inline int rsv_is_empty(struct ext3_reserve_window *rsv)
+static inline int rsv_is_empty(struct ext4_reserve_window *rsv)
 {
 	/* a valid reservation end block could not be 0 */
-	return rsv->_rsv_end == EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
+	return rsv->_rsv_end == EXT4_RESERVE_WINDOW_NOT_ALLOCATED;
 }
 
 /**
- * ext3_init_block_alloc_info()
+ * ext4_init_block_alloc_info()
  * @inode:		file inode structure
  *
  * Allocate and initialize the	reservation window structure, and
- * link the window to the ext3 inode structure at last
+ * link the window to the ext4 inode structure at last
  *
  * The reservation window structure is only dynamically allocated
- * and linked to ext3 inode the first time the open file
- * needs a new block. So, before every ext3_new_block(s) call, for
+ * and linked to ext4 inode the first time the open file
+ * needs a new block. So, before every ext4_new_block(s) call, for
  * regular files, we should check whether the reservation window
  * structure exists or not. In the latter case, this function is called.
  * Fail to do so will result in block reservation being turned off for that
  * open file.
  *
- * This function is called from ext3_get_blocks_handle(), also called
+ * This function is called from ext4_get_blocks_handle(), also called
  * when setting the reservation window size through ioctl before the file
  * is open for write (needs block allocation).
  *
  * Needs truncate_mutex protection prior to call this function.
  */
-void ext3_init_block_alloc_info(struct inode *inode)
+void ext4_init_block_alloc_info(struct inode *inode)
 {
-	struct ext3_inode_info *ei = EXT3_I(inode);
-	struct ext3_block_alloc_info *block_i = ei->i_block_alloc_info;
+	struct ext4_inode_info *ei = EXT4_I(inode);
+	struct ext4_block_alloc_info *block_i = ei->i_block_alloc_info;
 	struct super_block *sb = inode->i_sb;
 
 	block_i = kmalloc(sizeof(*block_i), GFP_NOFS);
 	if (block_i) {
-		struct ext3_reserve_window_node *rsv = &block_i->rsv_window_node;
+		struct ext4_reserve_window_node *rsv = &block_i->rsv_window_node;
 
-		rsv->rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
-		rsv->rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
+		rsv->rsv_start = EXT4_RESERVE_WINDOW_NOT_ALLOCATED;
+		rsv->rsv_end = EXT4_RESERVE_WINDOW_NOT_ALLOCATED;
 
 		/*
 		 * if filesystem is mounted with NORESERVATION, the goal
@@ -363,7 +363,7 @@ void ext3_init_block_alloc_info(struct inode *inode)
 		if (!test_opt(sb, RESERVATION))
 			rsv->rsv_goal_size = 0;
 		else
-			rsv->rsv_goal_size = EXT3_DEFAULT_RESERVE_BLOCKS;
+			rsv->rsv_goal_size = EXT4_DEFAULT_RESERVE_BLOCKS;
 		rsv->rsv_alloc_hit = 0;
 		block_i->last_alloc_logical_block = 0;
 		block_i->last_alloc_physical_block = 0;
@@ -372,24 +372,24 @@ void ext3_init_block_alloc_info(struct inode *inode)
 }
 
 /**
- * ext3_discard_reservation()
+ * ext4_discard_reservation()
  * @inode:		inode
  *
  * Discard(free) block reservation window on last file close, or truncate
  * or at last iput().
  *
  * It is being called in three cases:
- *	ext3_release_file(): last writer close the file
- *	ext3_clear_inode(): last iput(), when nobody link to this file.
- *	ext3_truncate(): when the block indirect map is about to change.
+ *	ext4_release_file(): last writer close the file
+ *	ext4_clear_inode(): last iput(), when nobody link to this file.
+ *	ext4_truncate(): when the block indirect map is about to change.
  *
  */
-void ext3_discard_reservation(struct inode *inode)
+void ext4_discard_reservation(struct inode *inode)
 {
-	struct ext3_inode_info *ei = EXT3_I(inode);
-	struct ext3_block_alloc_info *block_i = ei->i_block_alloc_info;
-	struct ext3_reserve_window_node *rsv;
-	spinlock_t *rsv_lock = &EXT3_SB(inode->i_sb)->s_rsv_window_lock;
+	struct ext4_inode_info *ei = EXT4_I(inode);
+	struct ext4_block_alloc_info *block_i = ei->i_block_alloc_info;
+	struct ext4_reserve_window_node *rsv;
+	spinlock_t *rsv_lock = &EXT4_SB(inode->i_sb)->s_rsv_window_lock;
 
 	if (!block_i)
 		return;
@@ -404,62 +404,62 @@ void ext3_discard_reservation(struct inode *inode)
 }
 
 /**
- * ext3_free_blocks_sb() -- Free given blocks and update quota
+ * ext4_free_blocks_sb() -- Free given blocks and update quota
  * @handle:			handle to this transaction
  * @sb:				super block
  * @block:			start physcial block to free
  * @count:			number of blocks to free
  * @pdquot_freed_blocks:	pointer to quota
  */
-void ext3_free_blocks_sb(handle_t *handle, struct super_block *sb,
-			 ext3_fsblk_t block, unsigned long count,
+void ext4_free_blocks_sb(handle_t *handle, struct super_block *sb,
+			 ext4_fsblk_t block, unsigned long count,
 			 unsigned long *pdquot_freed_blocks)
 {
 	struct buffer_head *bitmap_bh = NULL;
 	struct buffer_head *gd_bh;
 	unsigned long block_group;
-	ext3_grpblk_t bit;
+	ext4_grpblk_t bit;
 	unsigned long i;
 	unsigned long overflow;
-	struct ext3_group_desc * desc;
-	struct ext3_super_block * es;
-	struct ext3_sb_info *sbi;
+	struct ext4_group_desc * desc;
+	struct ext4_super_block * es;
+	struct ext4_sb_info *sbi;
 	int err = 0, ret;
-	ext3_grpblk_t group_freed;
+	ext4_grpblk_t group_freed;
 
 	*pdquot_freed_blocks = 0;
-	sbi = EXT3_SB(sb);
+	sbi = EXT4_SB(sb);
 	es = sbi->s_es;
 	if (block < le32_to_cpu(es->s_first_data_block) ||
 	    block + count < block ||
 	    block + count > le32_to_cpu(es->s_blocks_count)) {
-		ext3_error (sb, "ext3_free_blocks",
+		ext4_error (sb, "ext4_free_blocks",
 			    "Freeing blocks not in datazone - "
 			    "block = "E3FSBLK", count = %lu", block, count);
 		goto error_return;
 	}
 
-	ext3_debug ("freeing block(s) %lu-%lu\n", block, block + count - 1);
+	ext4_debug ("freeing block(s) %lu-%lu\n", block, block + count - 1);
 
 do_more:
 	overflow = 0;
 	block_group = (block - le32_to_cpu(es->s_first_data_block)) /
-		      EXT3_BLOCKS_PER_GROUP(sb);
+		      EXT4_BLOCKS_PER_GROUP(sb);
 	bit = (block - le32_to_cpu(es->s_first_data_block)) %
-		      EXT3_BLOCKS_PER_GROUP(sb);
+		      EXT4_BLOCKS_PER_GROUP(sb);
 	/*
 	 * Check to see if we are freeing blocks across a group
 	 * boundary.
 	 */
-	if (bit + count > EXT3_BLOCKS_PER_GROUP(sb)) {
-		overflow = bit + count - EXT3_BLOCKS_PER_GROUP(sb);
+	if (bit + count > EXT4_BLOCKS_PER_GROUP(sb)) {
+		overflow = bit + count - EXT4_BLOCKS_PER_GROUP(sb);
 		count -= overflow;
 	}
 	brelse(bitmap_bh);
 	bitmap_bh = read_block_bitmap(sb, block_group);
 	if (!bitmap_bh)
 		goto error_return;
-	desc = ext3_get_group_desc (sb, block_group, &gd_bh);
+	desc = ext4_get_group_desc (sb, block_group, &gd_bh);
 	if (!desc)
 		goto error_return;
 
@@ -469,7 +469,7 @@ do_more:
 		      sbi->s_itb_per_group) ||
 	    in_range (block + count - 1, le32_to_cpu(desc->bg_inode_table),
 		      sbi->s_itb_per_group))
-		ext3_error (sb, "ext3_free_blocks",
+		ext4_error (sb, "ext4_free_blocks",
 			    "Freeing blocks in system zones - "
 			    "Block = "E3FSBLK", count = %lu",
 			    block, count);
@@ -480,7 +480,7 @@ do_more:
 	 */
 	/* @@@ check errors */
 	BUFFER_TRACE(bitmap_bh, "getting undo access");
-	err = ext3_journal_get_undo_access(handle, bitmap_bh);
+	err = ext4_journal_get_undo_access(handle, bitmap_bh);
 	if (err)
 		goto error_return;
 
@@ -490,7 +490,7 @@ do_more:
 	 * using it
 	 */
 	BUFFER_TRACE(gd_bh, "get_write_access");
-	err = ext3_journal_get_write_access(handle, gd_bh);
+	err = ext4_journal_get_write_access(handle, gd_bh);
 	if (err)
 		goto error_return;
 
@@ -542,7 +542,7 @@ do_more:
 		BUFFER_TRACE(bitmap_bh, "set in b_committed_data");
 		J_ASSERT_BH(bitmap_bh,
 				bh2jh(bitmap_bh)->b_committed_data != NULL);
-		ext3_set_bit_atomic(sb_bgl_lock(sbi, block_group), bit + i,
+		ext4_set_bit_atomic(sb_bgl_lock(sbi, block_group), bit + i,
 				bh2jh(bitmap_bh)->b_committed_data);
 
 		/*
@@ -551,10 +551,10 @@ do_more:
 		 * the allocator uses.
 		 */
 		BUFFER_TRACE(bitmap_bh, "clear bit");
-		if (!ext3_clear_bit_atomic(sb_bgl_lock(sbi, block_group),
+		if (!ext4_clear_bit_atomic(sb_bgl_lock(sbi, block_group),
 						bit + i, bitmap_bh->b_data)) {
 			jbd_unlock_bh_state(bitmap_bh);
-			ext3_error(sb, __FUNCTION__,
+			ext4_error(sb, __FUNCTION__,
 				"bit already cleared for block "E3FSBLK,
 				 block + i);
 			jbd_lock_bh_state(bitmap_bh);
@@ -574,11 +574,11 @@ do_more:
 
 	/* We dirtied the bitmap block */
 	BUFFER_TRACE(bitmap_bh, "dirtied bitmap block");
-	err = ext3_journal_dirty_metadata(handle, bitmap_bh);
+	err = ext4_journal_dirty_metadata(handle, bitmap_bh);
 
 	/* And the group descriptor block */
 	BUFFER_TRACE(gd_bh, "dirtied group descriptor block");
-	ret = ext3_journal_dirty_metadata(handle, gd_bh);
+	ret = ext4_journal_dirty_metadata(handle, gd_bh);
 	if (!err) err = ret;
 	*pdquot_freed_blocks += group_freed;
 
@@ -590,40 +590,40 @@ do_more:
 	sb->s_dirt = 1;
 error_return:
 	brelse(bitmap_bh);
-	ext3_std_error(sb, err);
+	ext4_std_error(sb, err);
 	return;
 }
 
 /**
- * ext3_free_blocks() -- Free given blocks and update quota
+ * ext4_free_blocks() -- Free given blocks and update quota
  * @handle:		handle for this transaction
  * @inode:		inode
  * @block:		start physical block to free
  * @count:		number of blocks to count
  */
-void ext3_free_blocks(handle_t *handle, struct inode *inode,
-			ext3_fsblk_t block, unsigned long count)
+void ext4_free_blocks(handle_t *handle, struct inode *inode,
+			ext4_fsblk_t block, unsigned long count)
 {
 	struct super_block * sb;
 	unsigned long dquot_freed_blocks;
 
 	sb = inode->i_sb;
 	if (!sb) {
-		printk ("ext3_free_blocks: nonexistent device");
+		printk ("ext4_free_blocks: nonexistent device");
 		return;
 	}
-	ext3_free_blocks_sb(handle, sb, block, count, &dquot_freed_blocks);
+	ext4_free_blocks_sb(handle, sb, block, count, &dquot_freed_blocks);
 	if (dquot_freed_blocks)
 		DQUOT_FREE_BLOCK(inode, dquot_freed_blocks);
 	return;
 }
 
 /**
- * ext3_test_allocatable()
+ * ext4_test_allocatable()
  * @nr:			given allocation block group
  * @bh:			bufferhead contains the bitmap of the given block group
  *
- * For ext3 allocations, we must not reuse any blocks which are
+ * For ext4 allocations, we must not reuse any blocks which are
  * allocated in the bitmap buffer's "last committed data" copy.  This
  * prevents deletes from freeing up the page for reuse until we have
  * committed the delete transaction.
@@ -638,19 +638,19 @@ void ext3_free_blocks(handle_t *handle, struct inode *inode,
  * data-writes at some point, and disable it for metadata allocations or
  * sync-data inodes.
  */
-static int ext3_test_allocatable(ext3_grpblk_t nr, struct buffer_head *bh)
+static int ext4_test_allocatable(ext4_grpblk_t nr, struct buffer_head *bh)
 {
 	int ret;
 	struct journal_head *jh = bh2jh(bh);
 
-	if (ext3_test_bit(nr, bh->b_data))
+	if (ext4_test_bit(nr, bh->b_data))
 		return 0;
 
 	jbd_lock_bh_state(bh);
 	if (!jh->b_committed_data)
 		ret = 1;
 	else
-		ret = !ext3_test_bit(nr, jh->b_committed_data);
+		ret = !ext4_test_bit(nr, jh->b_committed_data);
 	jbd_unlock_bh_state(bh);
 	return ret;
 }
@@ -665,22 +665,22 @@ static int ext3_test_allocatable(ext3_grpblk_t nr, struct buffer_head *bh)
  * bitmap on disk and the last-committed copy in journal, until we find a
  * bit free in both bitmaps.
  */
-static ext3_grpblk_t
-bitmap_search_next_usable_block(ext3_grpblk_t start, struct buffer_head *bh,
-					ext3_grpblk_t maxblocks)
+static ext4_grpblk_t
+bitmap_search_next_usable_block(ext4_grpblk_t start, struct buffer_head *bh,
+					ext4_grpblk_t maxblocks)
 {
-	ext3_grpblk_t next;
+	ext4_grpblk_t next;
 	struct journal_head *jh = bh2jh(bh);
 
 	while (start < maxblocks) {
-		next = ext3_find_next_zero_bit(bh->b_data, maxblocks, start);
+		next = ext4_find_next_zero_bit(bh->b_data, maxblocks, start);
 		if (next >= maxblocks)
 			return -1;
-		if (ext3_test_allocatable(next, bh))
+		if (ext4_test_allocatable(next, bh))
 			return next;
 		jbd_lock_bh_state(bh);
 		if (jh->b_committed_data)
-			start = ext3_find_next_zero_bit(jh->b_committed_data,
+			start = ext4_find_next_zero_bit(jh->b_committed_data,
 							maxblocks, next);
 		jbd_unlock_bh_state(bh);
 	}
@@ -700,11 +700,11 @@ bitmap_search_next_usable_block(ext3_grpblk_t start, struct buffer_head *bh,
  * the initial goal; then for a free byte somewhere in the bitmap; then
  * for any free bit in the bitmap.
  */
-static ext3_grpblk_t
-find_next_usable_block(ext3_grpblk_t start, struct buffer_head *bh,
-			ext3_grpblk_t maxblocks)
+static ext4_grpblk_t
+find_next_usable_block(ext4_grpblk_t start, struct buffer_head *bh,
+			ext4_grpblk_t maxblocks)
 {
-	ext3_grpblk_t here, next;
+	ext4_grpblk_t here, next;
 	char *p, *r;
 
 	if (start > 0) {
@@ -713,16 +713,16 @@ find_next_usable_block(ext3_grpblk_t start, struct buffer_head *bh,
 		 * block within the next XX blocks.
 		 *
 		 * end_goal is more or less random, but it has to be
-		 * less than EXT3_BLOCKS_PER_GROUP. Aligning up to the
+		 * less than EXT4_BLOCKS_PER_GROUP. Aligning up to the
 		 * next 64-bit boundary is simple..
 		 */
-		ext3_grpblk_t end_goal = (start + 63) & ~63;
+		ext4_grpblk_t end_goal = (start + 63) & ~63;
 		if (end_goal > maxblocks)
 			end_goal = maxblocks;
-		here = ext3_find_next_zero_bit(bh->b_data, end_goal, start);
-		if (here < end_goal && ext3_test_allocatable(here, bh))
+		here = ext4_find_next_zero_bit(bh->b_data, end_goal, start);
+		if (here < end_goal && ext4_test_allocatable(here, bh))
 			return here;
-		ext3_debug("Bit not found near goal\n");
+		ext4_debug("Bit not found near goal\n");
 	}
 
 	here = start;
@@ -733,7 +733,7 @@ find_next_usable_block(ext3_grpblk_t start, struct buffer_head *bh,
 	r = memscan(p, 0, (maxblocks - here + 7) >> 3);
 	next = (r - ((char *)bh->b_data)) << 3;
 
-	if (next < maxblocks && next >= start && ext3_test_allocatable(next, bh))
+	if (next < maxblocks && next >= start && ext4_test_allocatable(next, bh))
 		return next;
 
 	/*
@@ -757,16 +757,16 @@ find_next_usable_block(ext3_grpblk_t start, struct buffer_head *bh,
  * zero (failure).
  */
 static inline int
-claim_block(spinlock_t *lock, ext3_grpblk_t block, struct buffer_head *bh)
+claim_block(spinlock_t *lock, ext4_grpblk_t block, struct buffer_head *bh)
 {
 	struct journal_head *jh = bh2jh(bh);
 	int ret;
 
-	if (ext3_set_bit_atomic(lock, block, bh->b_data))
+	if (ext4_set_bit_atomic(lock, block, bh->b_data))
 		return 0;
 	jbd_lock_bh_state(bh);
-	if (jh->b_committed_data && ext3_test_bit(block,jh->b_committed_data)) {
-		ext3_clear_bit_atomic(lock, block, bh->b_data);
+	if (jh->b_committed_data && ext4_test_bit(block,jh->b_committed_data)) {
+		ext4_clear_bit_atomic(lock, block, bh->b_data);
 		ret = 0;
 	} else {
 		ret = 1;
@@ -776,7 +776,7 @@ claim_block(spinlock_t *lock, ext3_grpblk_t block, struct buffer_head *bh)
 }
 
 /**
- * ext3_try_to_allocate()
+ * ext4_try_to_allocate()
  * @sb:			superblock
  * @handle:		handle to this transaction
  * @group:		given allocation block group
@@ -797,29 +797,29 @@ claim_block(spinlock_t *lock, ext3_grpblk_t block, struct buffer_head *bh)
  *
  * If we failed to allocate the desired block then we may end up crossing to a
  * new bitmap.  In that case we must release write access to the old one via
- * ext3_journal_release_buffer(), else we'll run out of credits.
+ * ext4_journal_release_buffer(), else we'll run out of credits.
  */
-static ext3_grpblk_t
-ext3_try_to_allocate(struct super_block *sb, handle_t *handle, int group,
-			struct buffer_head *bitmap_bh, ext3_grpblk_t grp_goal,
-			unsigned long *count, struct ext3_reserve_window *my_rsv)
+static ext4_grpblk_t
+ext4_try_to_allocate(struct super_block *sb, handle_t *handle, int group,
+			struct buffer_head *bitmap_bh, ext4_grpblk_t grp_goal,
+			unsigned long *count, struct ext4_reserve_window *my_rsv)
 {
-	ext3_fsblk_t group_first_block;
-	ext3_grpblk_t start, end;
+	ext4_fsblk_t group_first_block;
+	ext4_grpblk_t start, end;
 	unsigned long num = 0;
 
 	/* we do allocation within the reservation window if we have a window */
 	if (my_rsv) {
-		group_first_block = ext3_group_first_block_no(sb, group);
+		group_first_block = ext4_group_first_block_no(sb, group);
 		if (my_rsv->_rsv_start >= group_first_block)
 			start = my_rsv->_rsv_start - group_first_block;
 		else
 			/* reservation window cross group boundary */
 			start = 0;
 		end = my_rsv->_rsv_end - group_first_block + 1;
-		if (end > EXT3_BLOCKS_PER_GROUP(sb))
+		if (end > EXT4_BLOCKS_PER_GROUP(sb))
 			/* reservation window crosses group boundary */
-			end = EXT3_BLOCKS_PER_GROUP(sb);
+			end = EXT4_BLOCKS_PER_GROUP(sb);
 		if ((start <= grp_goal) && (grp_goal < end))
 			start = grp_goal;
 		else
@@ -829,13 +829,13 @@ ext3_try_to_allocate(struct super_block *sb, handle_t *handle, int group,
 			start = grp_goal;
 		else
 			start = 0;
-		end = EXT3_BLOCKS_PER_GROUP(sb);
+		end = EXT4_BLOCKS_PER_GROUP(sb);
 	}
 
-	BUG_ON(start > EXT3_BLOCKS_PER_GROUP(sb));
+	BUG_ON(start > EXT4_BLOCKS_PER_GROUP(sb));
 
 repeat:
-	if (grp_goal < 0 || !ext3_test_allocatable(grp_goal, bitmap_bh)) {
+	if (grp_goal < 0 || !ext4_test_allocatable(grp_goal, bitmap_bh)) {
 		grp_goal = find_next_usable_block(start, bitmap_bh, end);
 		if (grp_goal < 0)
 			goto fail_access;
@@ -843,7 +843,7 @@ repeat:
 			int i;
 
 			for (i = 0; i < 7 && grp_goal > start &&
-					ext3_test_allocatable(grp_goal - 1,
+					ext4_test_allocatable(grp_goal - 1,
 								bitmap_bh);
 					i++, grp_goal--)
 				;
@@ -851,7 +851,7 @@ repeat:
 	}
 	start = grp_goal;
 
-	if (!claim_block(sb_bgl_lock(EXT3_SB(sb), group),
+	if (!claim_block(sb_bgl_lock(EXT4_SB(sb), group),
 		grp_goal, bitmap_bh)) {
 		/*
 		 * The block was allocated by another thread, or it was
@@ -866,8 +866,8 @@ repeat:
 	num++;
 	grp_goal++;
 	while (num < *count && grp_goal < end
-		&& ext3_test_allocatable(grp_goal, bitmap_bh)
-		&& claim_block(sb_bgl_lock(EXT3_SB(sb), group),
+		&& ext4_test_allocatable(grp_goal, bitmap_bh)
+		&& claim_block(sb_bgl_lock(EXT4_SB(sb), group),
 				grp_goal, bitmap_bh)) {
 		num++;
 		grp_goal++;
@@ -913,15 +913,15 @@ fail_access:
  *
  */
 static int find_next_reservable_window(
-				struct ext3_reserve_window_node *search_head,
-				struct ext3_reserve_window_node *my_rsv,
+				struct ext4_reserve_window_node *search_head,
+				struct ext4_reserve_window_node *my_rsv,
 				struct super_block * sb,
-				ext3_fsblk_t start_block,
-				ext3_fsblk_t last_block)
+				ext4_fsblk_t start_block,
+				ext4_fsblk_t last_block)
 {
 	struct rb_node *next;
-	struct ext3_reserve_window_node *rsv, *prev;
-	ext3_fsblk_t cur;
+	struct ext4_reserve_window_node *rsv, *prev;
+	ext4_fsblk_t cur;
 	int size = my_rsv->rsv_goal_size;
 
 	/* TODO: make the start of the reservation window byte-aligned */
@@ -949,7 +949,7 @@ static int find_next_reservable_window(
 
 		prev = rsv;
 		next = rb_next(&rsv->rsv_node);
-		rsv = list_entry(next,struct ext3_reserve_window_node,rsv_node);
+		rsv = list_entry(next,struct ext4_reserve_window_node,rsv_node);
 
 		/*
 		 * Reached the last reservation, we can just append to the
@@ -992,7 +992,7 @@ static int find_next_reservable_window(
 	my_rsv->rsv_alloc_hit = 0;
 
 	if (prev != my_rsv)
-		ext3_rsv_window_add(sb, my_rsv);
+		ext4_rsv_window_add(sb, my_rsv);
 
 	return 0;
 }
@@ -1034,20 +1034,20 @@ static int find_next_reservable_window(
  *	@bitmap_bh: the block group block bitmap
  *
  */
-static int alloc_new_reservation(struct ext3_reserve_window_node *my_rsv,
-		ext3_grpblk_t grp_goal, struct super_block *sb,
+static int alloc_new_reservation(struct ext4_reserve_window_node *my_rsv,
+		ext4_grpblk_t grp_goal, struct super_block *sb,
 		unsigned int group, struct buffer_head *bitmap_bh)
 {
-	struct ext3_reserve_window_node *search_head;
-	ext3_fsblk_t group_first_block, group_end_block, start_block;
-	ext3_grpblk_t first_free_block;
-	struct rb_root *fs_rsv_root = &EXT3_SB(sb)->s_rsv_window_root;
+	struct ext4_reserve_window_node *search_head;
+	ext4_fsblk_t group_first_block, group_end_block, start_block;
+	ext4_grpblk_t first_free_block;
+	struct rb_root *fs_rsv_root = &EXT4_SB(sb)->s_rsv_window_root;
 	unsigned long size;
 	int ret;
-	spinlock_t *rsv_lock = &EXT3_SB(sb)->s_rsv_window_lock;
+	spinlock_t *rsv_lock = &EXT4_SB(sb)->s_rsv_window_lock;
 
-	group_first_block = ext3_group_first_block_no(sb, group);
-	group_end_block = group_first_block + (EXT3_BLOCKS_PER_GROUP(sb) - 1);
+	group_first_block = ext4_group_first_block_no(sb, group);
+	group_end_block = group_first_block + (EXT4_BLOCKS_PER_GROUP(sb) - 1);
 
 	if (grp_goal < 0)
 		start_block = group_first_block;
@@ -1085,8 +1085,8 @@ static int alloc_new_reservation(struct ext3_reserve_window_node *my_rsv,
 			 * otherwise we keep the same size window
 			 */
 			size = size * 2;
-			if (size > EXT3_MAX_RESERVE_BLOCKS)
-				size = EXT3_MAX_RESERVE_BLOCKS;
+			if (size > EXT4_MAX_RESERVE_BLOCKS)
+				size = EXT4_MAX_RESERVE_BLOCKS;
 			my_rsv->rsv_goal_size= size;
 		}
 	}
@@ -1170,20 +1170,20 @@ retry:
  * Attempt to expand the reservation window large enough to have
  * required number of free blocks
  *
- * Since ext3_try_to_allocate() will always allocate blocks within
+ * Since ext4_try_to_allocate() will always allocate blocks within
  * the reservation window range, if the window size is too small,
  * multiple blocks allocation has to stop at the end of the reservation
  * window. To make this more efficient, given the total number of
  * blocks needed and the current size of the window, we try to
  * expand the reservation window size if necessary on a best-effort
- * basis before ext3_new_blocks() tries to allocate blocks,
+ * basis before ext4_new_blocks() tries to allocate blocks,
  */
-static void try_to_extend_reservation(struct ext3_reserve_window_node *my_rsv,
+static void try_to_extend_reservation(struct ext4_reserve_window_node *my_rsv,
 			struct super_block *sb, int size)
 {
-	struct ext3_reserve_window_node *next_rsv;
+	struct ext4_reserve_window_node *next_rsv;
 	struct rb_node *next;
-	spinlock_t *rsv_lock = &EXT3_SB(sb)->s_rsv_window_lock;
+	spinlock_t *rsv_lock = &EXT4_SB(sb)->s_rsv_window_lock;
 
 	if (!spin_trylock(rsv_lock))
 		return;
@@ -1193,7 +1193,7 @@ static void try_to_extend_reservation(struct ext3_reserve_window_node *my_rsv,
 	if (!next)
 		my_rsv->rsv_end += size;
 	else {
-		next_rsv = list_entry(next, struct ext3_reserve_window_node, rsv_node);
+		next_rsv = list_entry(next, struct ext4_reserve_window_node, rsv_node);
 
 		if ((next_rsv->rsv_start - my_rsv->rsv_end - 1) >= size)
 			my_rsv->rsv_end += size;
@@ -1204,7 +1204,7 @@ static void try_to_extend_reservation(struct ext3_reserve_window_node *my_rsv,
 }
 
 /**
- * ext3_try_to_allocate_with_rsv()
+ * ext4_try_to_allocate_with_rsv()
  * @sb:			superblock
  * @handle:		handle to this transaction
  * @group:		given allocation block group
@@ -1232,15 +1232,15 @@ static void try_to_extend_reservation(struct ext3_reserve_window_node *my_rsv,
  * We use a red-black tree for the per-filesystem reservation list.
  *
  */
-static ext3_grpblk_t
-ext3_try_to_allocate_with_rsv(struct super_block *sb, handle_t *handle,
+static ext4_grpblk_t
+ext4_try_to_allocate_with_rsv(struct super_block *sb, handle_t *handle,
 			unsigned int group, struct buffer_head *bitmap_bh,
-			ext3_grpblk_t grp_goal,
-			struct ext3_reserve_window_node * my_rsv,
+			ext4_grpblk_t grp_goal,
+			struct ext4_reserve_window_node * my_rsv,
 			unsigned long *count, int *errp)
 {
-	ext3_fsblk_t group_first_block, group_last_block;
-	ext3_grpblk_t ret = 0;
+	ext4_fsblk_t group_first_block, group_last_block;
+	ext4_grpblk_t ret = 0;
 	int fatal;
 	unsigned long num = *count;
 
@@ -1252,7 +1252,7 @@ ext3_try_to_allocate_with_rsv(struct super_block *sb, handle_t *handle,
 	 * if the buffer is in BJ_Forget state in the committing transaction.
 	 */
 	BUFFER_TRACE(bitmap_bh, "get undo access for new block");
-	fatal = ext3_journal_get_undo_access(handle, bitmap_bh);
+	fatal = ext4_journal_get_undo_access(handle, bitmap_bh);
 	if (fatal) {
 		*errp = fatal;
 		return -1;
@@ -1265,18 +1265,18 @@ ext3_try_to_allocate_with_rsv(struct super_block *sb, handle_t *handle,
 	 * or last attempt to allocate a block with reservation turned on failed
 	 */
 	if (my_rsv == NULL ) {
-		ret = ext3_try_to_allocate(sb, handle, group, bitmap_bh,
+		ret = ext4_try_to_allocate(sb, handle, group, bitmap_bh,
 						grp_goal, count, NULL);
 		goto out;
 	}
 	/*
 	 * grp_goal is a group relative block number (if there is a goal)
-	 * 0 < grp_goal < EXT3_BLOCKS_PER_GROUP(sb)
+	 * 0 < grp_goal < EXT4_BLOCKS_PER_GROUP(sb)
 	 * first block is a filesystem wide block number
 	 * first block is the block number of the first block in this group
 	 */
-	group_first_block = ext3_group_first_block_no(sb, group);
-	group_last_block = group_first_block + (EXT3_BLOCKS_PER_GROUP(sb) - 1);
+	group_first_block = ext4_group_first_block_no(sb, group);
+	group_last_block = group_first_block + (EXT4_BLOCKS_PER_GROUP(sb) - 1);
 
 	/*
 	 * Basically we will allocate a new block from inode's reservation
@@ -1314,10 +1314,10 @@ ext3_try_to_allocate_with_rsv(struct super_block *sb, handle_t *handle,
 
 		if ((my_rsv->rsv_start > group_last_block) ||
 				(my_rsv->rsv_end < group_first_block)) {
-			rsv_window_dump(&EXT3_SB(sb)->s_rsv_window_root, 1);
+			rsv_window_dump(&EXT4_SB(sb)->s_rsv_window_root, 1);
 			BUG();
 		}
-		ret = ext3_try_to_allocate(sb, handle, group, bitmap_bh,
+		ret = ext4_try_to_allocate(sb, handle, group, bitmap_bh,
 					   grp_goal, &num, &my_rsv->rsv_window);
 		if (ret >= 0) {
 			my_rsv->rsv_alloc_hit += num;
@@ -1330,7 +1330,7 @@ out:
 	if (ret >= 0) {
 		BUFFER_TRACE(bitmap_bh, "journal_dirty_metadata for "
 					"bitmap block");
-		fatal = ext3_journal_dirty_metadata(handle, bitmap_bh);
+		fatal = ext4_journal_dirty_metadata(handle, bitmap_bh);
 		if (fatal) {
 			*errp = fatal;
 			return -1;
@@ -1339,19 +1339,19 @@ out:
 	}
 
 	BUFFER_TRACE(bitmap_bh, "journal_release_buffer");
-	ext3_journal_release_buffer(handle, bitmap_bh);
+	ext4_journal_release_buffer(handle, bitmap_bh);
 	return ret;
 }
 
 /**
- * ext3_has_free_blocks()
+ * ext4_has_free_blocks()
  * @sbi:		in-core super block structure.
  *
  * Check if filesystem has at least 1 free block available for allocation.
  */
-static int ext3_has_free_blocks(struct ext3_sb_info *sbi)
+static int ext4_has_free_blocks(struct ext4_sb_info *sbi)
 {
-	ext3_fsblk_t free_blocks, root_blocks;
+	ext4_fsblk_t free_blocks, root_blocks;
 
 	free_blocks = percpu_counter_read_positive(&sbi->s_freeblocks_counter);
 	root_blocks = le32_to_cpu(sbi->s_es->s_r_blocks_count);
@@ -1364,63 +1364,63 @@ static int ext3_has_free_blocks(struct ext3_sb_info *sbi)
 }
 
 /**
- * ext3_should_retry_alloc()
+ * ext4_should_retry_alloc()
  * @sb:			super block
  * @retries		number of attemps has been made
  *
- * ext3_should_retry_alloc() is called when ENOSPC is returned, and if
+ * ext4_should_retry_alloc() is called when ENOSPC is returned, and if
  * it is profitable to retry the operation, this function will wait
  * for the current or commiting transaction to complete, and then
  * return TRUE.
  *
  * if the total number of retries exceed three times, return FALSE.
  */
-int ext3_should_retry_alloc(struct super_block *sb, int *retries)
+int ext4_should_retry_alloc(struct super_block *sb, int *retries)
 {
-	if (!ext3_has_free_blocks(EXT3_SB(sb)) || (*retries)++ > 3)
+	if (!ext4_has_free_blocks(EXT4_SB(sb)) || (*retries)++ > 3)
 		return 0;
 
 	jbd_debug(1, "%s: retrying operation after ENOSPC\n", sb->s_id);
 
-	return journal_force_commit_nested(EXT3_SB(sb)->s_journal);
+	return journal_force_commit_nested(EXT4_SB(sb)->s_journal);
 }
 
 /**
- * ext3_new_blocks() -- core block(s) allocation function
+ * ext4_new_blocks() -- core block(s) allocation function
  * @handle:		handle to this transaction
  * @inode:		file inode
  * @goal:		given target block(filesystem wide)
  * @count:		target number of blocks to allocate
  * @errp:		error code
  *
- * ext3_new_blocks uses a goal block to assist allocation.  It tries to
+ * ext4_new_blocks uses a goal block to assist allocation.  It tries to
  * allocate block(s) from the block group contains the goal block first. If that
  * fails, it will try to allocate block(s) from other block groups without
  * any specific goal block.
  *
  */
-ext3_fsblk_t ext3_new_blocks(handle_t *handle, struct inode *inode,
-			ext3_fsblk_t goal, unsigned long *count, int *errp)
+ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
+			ext4_fsblk_t goal, unsigned long *count, int *errp)
 {
 	struct buffer_head *bitmap_bh = NULL;
 	struct buffer_head *gdp_bh;
 	int group_no;
 	int goal_group;
-	ext3_grpblk_t grp_target_blk;	/* blockgroup relative goal block */
-	ext3_grpblk_t grp_alloc_blk;	/* blockgroup-relative allocated block*/
-	ext3_fsblk_t ret_block;		/* filesyetem-wide allocated block */
+	ext4_grpblk_t grp_target_blk;	/* blockgroup relative goal block */
+	ext4_grpblk_t grp_alloc_blk;	/* blockgroup-relative allocated block*/
+	ext4_fsblk_t ret_block;		/* filesyetem-wide allocated block */
 	int bgi;			/* blockgroup iteration index */
 	int fatal = 0, err;
 	int performed_allocation = 0;
-	ext3_grpblk_t free_blocks;	/* number of free blocks in a group */
+	ext4_grpblk_t free_blocks;	/* number of free blocks in a group */
 	struct super_block *sb;
-	struct ext3_group_desc *gdp;
-	struct ext3_super_block *es;
-	struct ext3_sb_info *sbi;
-	struct ext3_reserve_window_node *my_rsv = NULL;
-	struct ext3_block_alloc_info *block_i;
+	struct ext4_group_desc *gdp;
+	struct ext4_super_block *es;
+	struct ext4_sb_info *sbi;
+	struct ext4_reserve_window_node *my_rsv = NULL;
+	struct ext4_block_alloc_info *block_i;
 	unsigned short windowsz = 0;
-#ifdef EXT3FS_DEBUG
+#ifdef EXT4FS_DEBUG
 	static int goal_hits, goal_attempts;
 #endif
 	unsigned long ngroups;
@@ -1429,7 +1429,7 @@ ext3_fsblk_t ext3_new_blocks(handle_t *handle, struct inode *inode,
 	*errp = -ENOSPC;
 	sb = inode->i_sb;
 	if (!sb) {
-		printk("ext3_new_block: nonexistent device");
+		printk("ext4_new_block: nonexistent device");
 		return 0;
 	}
 
@@ -1441,22 +1441,22 @@ ext3_fsblk_t ext3_new_blocks(handle_t *handle, struct inode *inode,
 		return 0;
 	}
 
-	sbi = EXT3_SB(sb);
-	es = EXT3_SB(sb)->s_es;
-	ext3_debug("goal=%lu.\n", goal);
+	sbi = EXT4_SB(sb);
+	es = EXT4_SB(sb)->s_es;
+	ext4_debug("goal=%lu.\n", goal);
 	/*
 	 * Allocate a block from reservation only when
 	 * filesystem is mounted with reservation(default,-o reservation), and
 	 * it's a regular file, and
 	 * the desired window size is greater than 0 (One could use ioctl
-	 * command EXT3_IOC_SETRSVSZ to set the window size to 0 to turn off
+	 * command EXT4_IOC_SETRSVSZ to set the window size to 0 to turn off
 	 * reservation on that particular file)
 	 */
-	block_i = EXT3_I(inode)->i_block_alloc_info;
+	block_i = EXT4_I(inode)->i_block_alloc_info;
 	if (block_i && ((windowsz = block_i->rsv_window_node.rsv_goal_size) > 0))
 		my_rsv = &block_i->rsv_window_node;
 
-	if (!ext3_has_free_blocks(sbi)) {
+	if (!ext4_has_free_blocks(sbi)) {
 		*errp = -ENOSPC;
 		goto out;
 	}
@@ -1468,10 +1468,10 @@ ext3_fsblk_t ext3_new_blocks(handle_t *handle, struct inode *inode,
 	    goal >= le32_to_cpu(es->s_blocks_count))
 		goal = le32_to_cpu(es->s_first_data_block);
 	group_no = (goal - le32_to_cpu(es->s_first_data_block)) /
-			EXT3_BLOCKS_PER_GROUP(sb);
+			EXT4_BLOCKS_PER_GROUP(sb);
 	goal_group = group_no;
 retry_alloc:
-	gdp = ext3_get_group_desc(sb, group_no, &gdp_bh);
+	gdp = ext4_get_group_desc(sb, group_no, &gdp_bh);
 	if (!gdp)
 		goto io_error;
 
@@ -1486,11 +1486,11 @@ retry_alloc:
 
 	if (free_blocks > 0) {
 		grp_target_blk = ((goal - le32_to_cpu(es->s_first_data_block)) %
-				EXT3_BLOCKS_PER_GROUP(sb));
+				EXT4_BLOCKS_PER_GROUP(sb));
 		bitmap_bh = read_block_bitmap(sb, group_no);
 		if (!bitmap_bh)
 			goto io_error;
-		grp_alloc_blk = ext3_try_to_allocate_with_rsv(sb, handle,
+		grp_alloc_blk = ext4_try_to_allocate_with_rsv(sb, handle,
 					group_no, bitmap_bh, grp_target_blk,
 					my_rsv,	&num, &fatal);
 		if (fatal)
@@ -1499,7 +1499,7 @@ retry_alloc:
 			goto allocated;
 	}
 
-	ngroups = EXT3_SB(sb)->s_groups_count;
+	ngroups = EXT4_SB(sb)->s_groups_count;
 	smp_rmb();
 
 	/*
@@ -1510,7 +1510,7 @@ retry_alloc:
 		group_no++;
 		if (group_no >= ngroups)
 			group_no = 0;
-		gdp = ext3_get_group_desc(sb, group_no, &gdp_bh);
+		gdp = ext4_get_group_desc(sb, group_no, &gdp_bh);
 		if (!gdp) {
 			*errp = -EIO;
 			goto out;
@@ -1531,7 +1531,7 @@ retry_alloc:
 		/*
 		 * try to allocate block(s) from this group, without a goal(-1).
 		 */
-		grp_alloc_blk = ext3_try_to_allocate_with_rsv(sb, handle,
+		grp_alloc_blk = ext4_try_to_allocate_with_rsv(sb, handle,
 					group_no, bitmap_bh, -1, my_rsv,
 					&num, &fatal);
 		if (fatal)
@@ -1557,23 +1557,23 @@ retry_alloc:
 
 allocated:
 
-	ext3_debug("using block group %d(%d)\n",
+	ext4_debug("using block group %d(%d)\n",
 			group_no, gdp->bg_free_blocks_count);
 
 	BUFFER_TRACE(gdp_bh, "get_write_access");
-	fatal = ext3_journal_get_write_access(handle, gdp_bh);
+	fatal = ext4_journal_get_write_access(handle, gdp_bh);
 	if (fatal)
 		goto out;
 
-	ret_block = grp_alloc_blk + ext3_group_first_block_no(sb, group_no);
+	ret_block = grp_alloc_blk + ext4_group_first_block_no(sb, group_no);
 
 	if (in_range(le32_to_cpu(gdp->bg_block_bitmap), ret_block, num) ||
 	    in_range(le32_to_cpu(gdp->bg_inode_bitmap), ret_block, num) ||
 	    in_range(ret_block, le32_to_cpu(gdp->bg_inode_table),
-		      EXT3_SB(sb)->s_itb_per_group) ||
+		      EXT4_SB(sb)->s_itb_per_group) ||
 	    in_range(ret_block + num - 1, le32_to_cpu(gdp->bg_inode_table),
-		      EXT3_SB(sb)->s_itb_per_group))
-		ext3_error(sb, "ext3_new_block",
+		      EXT4_SB(sb)->s_itb_per_group))
+		ext4_error(sb, "ext4_new_block",
 			    "Allocating block in system zone - "
 			    "blocks from "E3FSBLK", length %lu",
 			     ret_block, num);
@@ -1598,20 +1598,20 @@ allocated:
 		int i;
 
 		for (i = 0; i < num; i++) {
-			if (ext3_test_bit(grp_alloc_blk+i,
+			if (ext4_test_bit(grp_alloc_blk+i,
 					bh2jh(bitmap_bh)->b_committed_data)) {
 				printk("%s: block was unexpectedly set in "
 					"b_committed_data\n", __FUNCTION__);
 			}
 		}
 	}
-	ext3_debug("found bit %d\n", grp_alloc_blk);
+	ext4_debug("found bit %d\n", grp_alloc_blk);
 	spin_unlock(sb_bgl_lock(sbi, group_no));
 	jbd_unlock_bh_state(bitmap_bh);
 #endif
 
 	if (ret_block + num - 1 >= le32_to_cpu(es->s_blocks_count)) {
-		ext3_error(sb, "ext3_new_block",
+		ext4_error(sb, "ext4_new_block",
 			    "block("E3FSBLK") >= blocks count(%d) - "
 			    "block_group = %d, es == %p ", ret_block,
 			le32_to_cpu(es->s_blocks_count), group_no, es);
@@ -1623,7 +1623,7 @@ allocated:
 	 * list of some description.  We don't know in advance whether
 	 * the caller wants to use it as metadata or data.
 	 */
-	ext3_debug("allocating block %lu. Goal hits %d of %d.\n",
+	ext4_debug("allocating block %lu. Goal hits %d of %d.\n",
 			ret_block, goal_hits, goal_attempts);
 
 	spin_lock(sb_bgl_lock(sbi, group_no));
@@ -1633,7 +1633,7 @@ allocated:
 	percpu_counter_mod(&sbi->s_freeblocks_counter, -num);
 
 	BUFFER_TRACE(gdp_bh, "journal_dirty_metadata for group descriptor");
-	err = ext3_journal_dirty_metadata(handle, gdp_bh);
+	err = ext4_journal_dirty_metadata(handle, gdp_bh);
 	if (!fatal)
 		fatal = err;
 
@@ -1652,7 +1652,7 @@ io_error:
 out:
 	if (fatal) {
 		*errp = fatal;
-		ext3_std_error(sb, fatal);
+		ext4_std_error(sb, fatal);
 	}
 	/*
 	 * Undo the block allocation
@@ -1663,40 +1663,40 @@ out:
 	return 0;
 }
 
-ext3_fsblk_t ext3_new_block(handle_t *handle, struct inode *inode,
-			ext3_fsblk_t goal, int *errp)
+ext4_fsblk_t ext4_new_block(handle_t *handle, struct inode *inode,
+			ext4_fsblk_t goal, int *errp)
 {
 	unsigned long count = 1;
 
-	return ext3_new_blocks(handle, inode, goal, &count, errp);
+	return ext4_new_blocks(handle, inode, goal, &count, errp);
 }
 
 /**
- * ext3_count_free_blocks() -- count filesystem free blocks
+ * ext4_count_free_blocks() -- count filesystem free blocks
  * @sb:		superblock
  *
  * Adds up the number of free blocks from each block group.
  */
-ext3_fsblk_t ext3_count_free_blocks(struct super_block *sb)
+ext4_fsblk_t ext4_count_free_blocks(struct super_block *sb)
 {
-	ext3_fsblk_t desc_count;
-	struct ext3_group_desc *gdp;
+	ext4_fsblk_t desc_count;
+	struct ext4_group_desc *gdp;
 	int i;
-	unsigned long ngroups = EXT3_SB(sb)->s_groups_count;
-#ifdef EXT3FS_DEBUG
-	struct ext3_super_block *es;
-	ext3_fsblk_t bitmap_count;
+	unsigned long ngroups = EXT4_SB(sb)->s_groups_count;
+#ifdef EXT4FS_DEBUG
+	struct ext4_super_block *es;
+	ext4_fsblk_t bitmap_count;
 	unsigned long x;
 	struct buffer_head *bitmap_bh = NULL;
 
-	es = EXT3_SB(sb)->s_es;
+	es = EXT4_SB(sb)->s_es;
 	desc_count = 0;
 	bitmap_count = 0;
 	gdp = NULL;
 
 	smp_rmb();
 	for (i = 0; i < ngroups; i++) {
-		gdp = ext3_get_group_desc(sb, i, NULL);
+		gdp = ext4_get_group_desc(sb, i, NULL);
 		if (!gdp)
 			continue;
 		desc_count += le16_to_cpu(gdp->bg_free_blocks_count);
@@ -1705,13 +1705,13 @@ ext3_fsblk_t ext3_count_free_blocks(struct super_block *sb)
 		if (bitmap_bh == NULL)
 			continue;
 
-		x = ext3_count_free(bitmap_bh, sb->s_blocksize);
+		x = ext4_count_free(bitmap_bh, sb->s_blocksize);
 		printk("group %d: stored = %d, counted = %lu\n",
 			i, le16_to_cpu(gdp->bg_free_blocks_count), x);
 		bitmap_count += x;
 	}
 	brelse(bitmap_bh);
-	printk("ext3_count_free_blocks: stored = "E3FSBLK
+	printk("ext4_count_free_blocks: stored = "E3FSBLK
 		", computed = "E3FSBLK", "E3FSBLK"\n",
 	       le32_to_cpu(es->s_free_blocks_count),
 		desc_count, bitmap_count);
@@ -1720,7 +1720,7 @@ ext3_fsblk_t ext3_count_free_blocks(struct super_block *sb)
 	desc_count = 0;
 	smp_rmb();
 	for (i = 0; i < ngroups; i++) {
-		gdp = ext3_get_group_desc(sb, i, NULL);
+		gdp = ext4_get_group_desc(sb, i, NULL);
 		if (!gdp)
 			continue;
 		desc_count += le16_to_cpu(gdp->bg_free_blocks_count);
@@ -1731,11 +1731,11 @@ ext3_fsblk_t ext3_count_free_blocks(struct super_block *sb)
 }
 
 static inline int
-block_in_use(ext3_fsblk_t block, struct super_block *sb, unsigned char *map)
+block_in_use(ext4_fsblk_t block, struct super_block *sb, unsigned char *map)
 {
-	return ext3_test_bit ((block -
-		le32_to_cpu(EXT3_SB(sb)->s_es->s_first_data_block)) %
-			 EXT3_BLOCKS_PER_GROUP(sb), map);
+	return ext4_test_bit ((block -
+		le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block)) %
+			 EXT4_BLOCKS_PER_GROUP(sb), map);
 }
 
 static inline int test_root(int a, int b)
@@ -1747,7 +1747,7 @@ static inline int test_root(int a, int b)
 	return num == a;
 }
 
-static int ext3_group_sparse(int group)
+static int ext4_group_sparse(int group)
 {
 	if (group <= 1)
 		return 1;
@@ -1758,44 +1758,44 @@ static int ext3_group_sparse(int group)
 }
 
 /**
- *	ext3_bg_has_super - number of blocks used by the superblock in group
+ *	ext4_bg_has_super - number of blocks used by the superblock in group
  *	@sb: superblock for filesystem
  *	@group: group number to check
  *
  *	Return the number of blocks used by the superblock (primary or backup)
  *	in this group.  Currently this will be only 0 or 1.
  */
-int ext3_bg_has_super(struct super_block *sb, int group)
+int ext4_bg_has_super(struct super_block *sb, int group)
 {
-	if (EXT3_HAS_RO_COMPAT_FEATURE(sb,
-				EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER) &&
-			!ext3_group_sparse(group))
+	if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
+				EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER) &&
+			!ext4_group_sparse(group))
 		return 0;
 	return 1;
 }
 
-static unsigned long ext3_bg_num_gdb_meta(struct super_block *sb, int group)
+static unsigned long ext4_bg_num_gdb_meta(struct super_block *sb, int group)
 {
-	unsigned long metagroup = group / EXT3_DESC_PER_BLOCK(sb);
-	unsigned long first = metagroup * EXT3_DESC_PER_BLOCK(sb);
-	unsigned long last = first + EXT3_DESC_PER_BLOCK(sb) - 1;
+	unsigned long metagroup = group / EXT4_DESC_PER_BLOCK(sb);
+	unsigned long first = metagroup * EXT4_DESC_PER_BLOCK(sb);
+	unsigned long last = first + EXT4_DESC_PER_BLOCK(sb) - 1;
 
 	if (group == first || group == first + 1 || group == last)
 		return 1;
 	return 0;
 }
 
-static unsigned long ext3_bg_num_gdb_nometa(struct super_block *sb, int group)
+static unsigned long ext4_bg_num_gdb_nometa(struct super_block *sb, int group)
 {
-	if (EXT3_HAS_RO_COMPAT_FEATURE(sb,
-				EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER) &&
-			!ext3_group_sparse(group))
+	if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
+				EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER) &&
+			!ext4_group_sparse(group))
 		return 0;
-	return EXT3_SB(sb)->s_gdb_count;
+	return EXT4_SB(sb)->s_gdb_count;
 }
 
 /**
- *	ext3_bg_num_gdb - number of blocks used by the group table in group
+ *	ext4_bg_num_gdb - number of blocks used by the group table in group
  *	@sb: superblock for filesystem
  *	@group: group number to check
  *
@@ -1803,16 +1803,16 @@ static unsigned long ext3_bg_num_gdb_nometa(struct super_block *sb, int group)
  *	(primary or backup) in this group.  In the future there may be a
  *	different number of descriptor blocks in each group.
  */
-unsigned long ext3_bg_num_gdb(struct super_block *sb, int group)
+unsigned long ext4_bg_num_gdb(struct super_block *sb, int group)
 {
 	unsigned long first_meta_bg =
-			le32_to_cpu(EXT3_SB(sb)->s_es->s_first_meta_bg);
-	unsigned long metagroup = group / EXT3_DESC_PER_BLOCK(sb);
+			le32_to_cpu(EXT4_SB(sb)->s_es->s_first_meta_bg);
+	unsigned long metagroup = group / EXT4_DESC_PER_BLOCK(sb);
 
-	if (!EXT3_HAS_INCOMPAT_FEATURE(sb,EXT3_FEATURE_INCOMPAT_META_BG) ||
+	if (!EXT4_HAS_INCOMPAT_FEATURE(sb,EXT4_FEATURE_INCOMPAT_META_BG) ||
 			metagroup < first_meta_bg)
-		return ext3_bg_num_gdb_nometa(sb,group);
+		return ext4_bg_num_gdb_nometa(sb,group);
 
-	return ext3_bg_num_gdb_meta(sb,group);
+	return ext4_bg_num_gdb_meta(sb,group);
 
 }
diff --git a/fs/ext4/bitmap.c b/fs/ext4/bitmap.c
index b9176ee..f4b3570 100644
--- a/fs/ext4/bitmap.c
+++ b/fs/ext4/bitmap.c
@@ -1,5 +1,5 @@
 /*
- *  linux/fs/ext3/bitmap.c
+ *  linux/fs/ext4/bitmap.c
  *
  * Copyright (C) 1992, 1993, 1994, 1995
  * Remy Card (card@masi.ibp.fr)
@@ -9,13 +9,13 @@
 
 #include <linux/buffer_head.h>
 #include <linux/jbd.h>
-#include <linux/ext3_fs.h>
+#include <linux/ext4_fs.h>
 
-#ifdef EXT3FS_DEBUG
+#ifdef EXT4FS_DEBUG
 
 static int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
 
-unsigned long ext3_count_free (struct buffer_head * map, unsigned int numchars)
+unsigned long ext4_count_free (struct buffer_head * map, unsigned int numchars)
 {
 	unsigned int i;
 	unsigned long sum = 0;
@@ -28,5 +28,5 @@ unsigned long ext3_count_free (struct buffer_head * map, unsigned int numchars)
 	return (sum);
 }
 
-#endif  /*  EXT3FS_DEBUG  */
+#endif  /*  EXT4FS_DEBUG  */
 
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index d0b54f3..ec114d7 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -1,5 +1,5 @@
 /*
- *  linux/fs/ext3/dir.c
+ *  linux/fs/ext4/dir.c
  *
  * Copyright (C) 1992, 1993, 1994, 1995
  * Remy Card (card@masi.ibp.fr)
@@ -12,7 +12,7 @@
  *
  *  Copyright (C) 1991, 1992  Linus Torvalds
  *
- *  ext3 directory handling functions
+ *  ext4 directory handling functions
  *
  *  Big-endian to little-endian byte-swapping/bitmaps by
  *        David S. Miller (davem@caip.rutgers.edu), 1995
@@ -23,69 +23,69 @@
 
 #include <linux/fs.h>
 #include <linux/jbd.h>
-#include <linux/ext3_fs.h>
+#include <linux/ext4_fs.h>
 #include <linux/buffer_head.h>
 #include <linux/smp_lock.h>
 #include <linux/slab.h>
 #include <linux/rbtree.h>
 
-static unsigned char ext3_filetype_table[] = {
+static unsigned char ext4_filetype_table[] = {
 	DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
 };
 
-static int ext3_readdir(struct file *, void *, filldir_t);
-static int ext3_dx_readdir(struct file * filp,
+static int ext4_readdir(struct file *, void *, filldir_t);
+static int ext4_dx_readdir(struct file * filp,
 			   void * dirent, filldir_t filldir);
-static int ext3_release_dir (struct inode * inode,
+static int ext4_release_dir (struct inode * inode,
 				struct file * filp);
 
-const struct file_operations ext3_dir_operations = {
+const struct file_operations ext4_dir_operations = {
 	.llseek		= generic_file_llseek,
 	.read		= generic_read_dir,
-	.readdir	= ext3_readdir,		/* we take BKL. needed?*/
-	.ioctl		= ext3_ioctl,		/* BKL held */
+	.readdir	= ext4_readdir,		/* we take BKL. needed?*/
+	.ioctl		= ext4_ioctl,		/* BKL held */
 #ifdef CONFIG_COMPAT
-	.compat_ioctl	= ext3_compat_ioctl,
+	.compat_ioctl	= ext4_compat_ioctl,
 #endif
-	.fsync		= ext3_sync_file,	/* BKL held */
-#ifdef CONFIG_EXT3_INDEX
-	.release	= ext3_release_dir,
+	.fsync		= ext4_sync_file,	/* BKL held */
+#ifdef CONFIG_EXT4_INDEX
+	.release	= ext4_release_dir,
 #endif
 };
 
 
 static unsigned char get_dtype(struct super_block *sb, int filetype)
 {
-	if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_FILETYPE) ||
-	    (filetype >= EXT3_FT_MAX))
+	if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE) ||
+	    (filetype >= EXT4_FT_MAX))
 		return DT_UNKNOWN;
 
-	return (ext3_filetype_table[filetype]);
+	return (ext4_filetype_table[filetype]);
 }
 
 
-int ext3_check_dir_entry (const char * function, struct inode * dir,
-			  struct ext3_dir_entry_2 * de,
+int ext4_check_dir_entry (const char * function, struct inode * dir,
+			  struct ext4_dir_entry_2 * de,
 			  struct buffer_head * bh,
 			  unsigned long offset)
 {
 	const char * error_msg = NULL;
 	const int rlen = le16_to_cpu(de->rec_len);
 
-	if (rlen < EXT3_DIR_REC_LEN(1))
+	if (rlen < EXT4_DIR_REC_LEN(1))
 		error_msg = "rec_len is smaller than minimal";
 	else if (rlen % 4 != 0)
 		error_msg = "rec_len % 4 != 0";
-	else if (rlen < EXT3_DIR_REC_LEN(de->name_len))
+	else if (rlen < EXT4_DIR_REC_LEN(de->name_len))
 		error_msg = "rec_len is too small for name_len";
 	else if (((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize)
 		error_msg = "directory entry across blocks";
 	else if (le32_to_cpu(de->inode) >
-			le32_to_cpu(EXT3_SB(dir->i_sb)->s_es->s_inodes_count))
+			le32_to_cpu(EXT4_SB(dir->i_sb)->s_es->s_inodes_count))
 		error_msg = "inode out of bounds";
 
 	if (error_msg != NULL)
-		ext3_error (dir->i_sb, function,
+		ext4_error (dir->i_sb, function,
 			"bad entry in directory #%lu: %s - "
 			"offset=%lu, inode=%lu, rec_len=%d, name_len=%d",
 			dir->i_ino, error_msg, offset,
@@ -94,13 +94,13 @@ int ext3_check_dir_entry (const char * function, struct inode * dir,
 	return error_msg == NULL ? 1 : 0;
 }
 
-static int ext3_readdir(struct file * filp,
+static int ext4_readdir(struct file * filp,
 			 void * dirent, filldir_t filldir)
 {
 	int error = 0;
 	unsigned long offset;
 	int i, stored;
-	struct ext3_dir_entry_2 *de;
+	struct ext4_dir_entry_2 *de;
 	struct super_block *sb;
 	int err;
 	struct inode *inode = filp->f_dentry->d_inode;
@@ -108,12 +108,12 @@ static int ext3_readdir(struct file * filp,
 
 	sb = inode->i_sb;
 
-#ifdef CONFIG_EXT3_INDEX
-	if (EXT3_HAS_COMPAT_FEATURE(inode->i_sb,
-				    EXT3_FEATURE_COMPAT_DIR_INDEX) &&
-	    ((EXT3_I(inode)->i_flags & EXT3_INDEX_FL) ||
+#ifdef CONFIG_EXT4_INDEX
+	if (EXT4_HAS_COMPAT_FEATURE(inode->i_sb,
+				    EXT4_FEATURE_COMPAT_DIR_INDEX) &&
+	    ((EXT4_I(inode)->i_flags & EXT4_INDEX_FL) ||
 	     ((inode->i_size >> sb->s_blocksize_bits) == 1))) {
-		err = ext3_dx_readdir(filp, dirent, filldir);
+		err = ext4_dx_readdir(filp, dirent, filldir);
 		if (err != ERR_BAD_DX_DIR) {
 			ret = err;
 			goto out;
@@ -122,19 +122,19 @@ static int ext3_readdir(struct file * filp,
 		 * We don't set the inode dirty flag since it's not
 		 * critical that it get flushed back to the disk.
 		 */
-		EXT3_I(filp->f_dentry->d_inode)->i_flags &= ~EXT3_INDEX_FL;
+		EXT4_I(filp->f_dentry->d_inode)->i_flags &= ~EXT4_INDEX_FL;
 	}
 #endif
 	stored = 0;
 	offset = filp->f_pos & (sb->s_blocksize - 1);
 
 	while (!error && !stored && filp->f_pos < inode->i_size) {
-		unsigned long blk = filp->f_pos >> EXT3_BLOCK_SIZE_BITS(sb);
+		unsigned long blk = filp->f_pos >> EXT4_BLOCK_SIZE_BITS(sb);
 		struct buffer_head map_bh;
 		struct buffer_head *bh = NULL;
 
 		map_bh.b_state = 0;
-		err = ext3_get_blocks_handle(NULL, inode, blk, 1,
+		err = ext4_get_blocks_handle(NULL, inode, blk, 1,
 						&map_bh, 0, 0);
 		if (err > 0) {
 			page_cache_readahead(sb->s_bdev->bd_inode->i_mapping,
@@ -143,7 +143,7 @@ static int ext3_readdir(struct file * filp,
 				map_bh.b_blocknr >>
 					(PAGE_CACHE_SHIFT - inode->i_blkbits),
 				1);
-			bh = ext3_bread(NULL, inode, blk, 0, &err);
+			bh = ext4_bread(NULL, inode, blk, 0, &err);
 		}
 
 		/*
@@ -151,7 +151,7 @@ static int ext3_readdir(struct file * filp,
 		 * of recovering data when there's a bad sector
 		 */
 		if (!bh) {
-			ext3_error (sb, "ext3_readdir",
+			ext4_error (sb, "ext4_readdir",
 				"directory #%lu contains a hole at offset %lu",
 				inode->i_ino, (unsigned long)filp->f_pos);
 			filp->f_pos += sb->s_blocksize - offset;
@@ -165,7 +165,7 @@ revalidate:
 		 * to make sure. */
 		if (filp->f_version != inode->i_version) {
 			for (i = 0; i < sb->s_blocksize && i < offset; ) {
-				de = (struct ext3_dir_entry_2 *)
+				de = (struct ext4_dir_entry_2 *)
 					(bh->b_data + i);
 				/* It's too expensive to do a full
 				 * dirent test each time round this
@@ -174,7 +174,7 @@ revalidate:
 				 * failure will be detected in the
 				 * dirent test below. */
 				if (le16_to_cpu(de->rec_len) <
-						EXT3_DIR_REC_LEN(1))
+						EXT4_DIR_REC_LEN(1))
 					break;
 				i += le16_to_cpu(de->rec_len);
 			}
@@ -186,8 +186,8 @@ revalidate:
 
 		while (!error && filp->f_pos < inode->i_size
 		       && offset < sb->s_blocksize) {
-			de = (struct ext3_dir_entry_2 *) (bh->b_data + offset);
-			if (!ext3_check_dir_entry ("ext3_readdir", inode, de,
+			de = (struct ext4_dir_entry_2 *) (bh->b_data + offset);
+			if (!ext4_check_dir_entry ("ext4_readdir", inode, de,
 						   bh, offset)) {
 				/* On error, skip the f_pos to the
                                    next block. */
@@ -228,7 +228,7 @@ out:
 	return ret;
 }
 
-#ifdef CONFIG_EXT3_INDEX
+#ifdef CONFIG_EXT4_INDEX
 /*
  * These functions convert from the major/minor hash to an f_pos
  * value.
@@ -323,7 +323,7 @@ static struct dir_private_info *create_dir_info(loff_t pos)
 	return p;
 }
 
-void ext3_htree_free_dir_info(struct dir_private_info *p)
+void ext4_htree_free_dir_info(struct dir_private_info *p)
 {
 	free_rb_tree_fname(&p->root);
 	kfree(p);
@@ -332,9 +332,9 @@ void ext3_htree_free_dir_info(struct dir_private_info *p)
 /*
  * Given a directory entry, enter it into the fname rb tree.
  */
-int ext3_htree_store_dirent(struct file *dir_file, __u32 hash,
+int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
 			     __u32 minor_hash,
-			     struct ext3_dir_entry_2 *dirent)
+			     struct ext4_dir_entry_2 *dirent)
 {
 	struct rb_node **p, *parent = NULL;
 	struct fname * fname, *new_fn;
@@ -390,7 +390,7 @@ int ext3_htree_store_dirent(struct file *dir_file, __u32 hash,
 
 
 /*
- * This is a helper function for ext3_dx_readdir.  It calls filldir
+ * This is a helper function for ext4_dx_readdir.  It calls filldir
  * for all entres on the fname linked list.  (Normally there is only
  * one entry on the linked list, unless there are 62 bit hash collisions.)
  */
@@ -425,7 +425,7 @@ static int call_filldir(struct file * filp, void * dirent,
 	return 0;
 }
 
-static int ext3_dx_readdir(struct file * filp,
+static int ext4_dx_readdir(struct file * filp,
 			 void * dirent, filldir_t filldir)
 {
 	struct dir_private_info *info = filp->private_data;
@@ -440,7 +440,7 @@ static int ext3_dx_readdir(struct file * filp,
 		filp->private_data = info;
 	}
 
-	if (filp->f_pos == EXT3_HTREE_EOF)
+	if (filp->f_pos == EXT4_HTREE_EOF)
 		return 0;	/* EOF */
 
 	/* Some one has messed with f_pos; reset the world */
@@ -474,13 +474,13 @@ static int ext3_dx_readdir(struct file * filp,
 			info->curr_node = NULL;
 			free_rb_tree_fname(&info->root);
 			filp->f_version = inode->i_version;
-			ret = ext3_htree_fill_tree(filp, info->curr_hash,
+			ret = ext4_htree_fill_tree(filp, info->curr_hash,
 						   info->curr_minor_hash,
 						   &info->next_hash);
 			if (ret < 0)
 				return ret;
 			if (ret == 0) {
-				filp->f_pos = EXT3_HTREE_EOF;
+				filp->f_pos = EXT4_HTREE_EOF;
 				break;
 			}
 			info->curr_node = rb_first(&info->root);
@@ -495,7 +495,7 @@ static int ext3_dx_readdir(struct file * filp,
 		info->curr_node = rb_next(info->curr_node);
 		if (!info->curr_node) {
 			if (info->next_hash == ~0) {
-				filp->f_pos = EXT3_HTREE_EOF;
+				filp->f_pos = EXT4_HTREE_EOF;
 				break;
 			}
 			info->curr_hash = info->next_hash;
@@ -507,10 +507,10 @@ finished:
 	return 0;
 }
 
-static int ext3_release_dir (struct inode * inode, struct file * filp)
+static int ext4_release_dir (struct inode * inode, struct file * filp)
 {
        if (filp->private_data)
-		ext3_htree_free_dir_info(filp->private_data);
+		ext4_htree_free_dir_info(filp->private_data);
 
 	return 0;
 }
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index e96c388..d938fbe 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -1,5 +1,5 @@
 /*
- *  linux/fs/ext3/file.c
+ *  linux/fs/ext4/file.c
  *
  * Copyright (C) 1992, 1993, 1994, 1995
  * Remy Card (card@masi.ibp.fr)
@@ -12,7 +12,7 @@
  *
  *  Copyright (C) 1991, 1992  Linus Torvalds
  *
- *  ext3 fs regular file handling primitives
+ *  ext4 fs regular file handling primitives
  *
  *  64-bit file support on 64-bit platforms by Jakub Jelinek
  *	(jj@sunsite.ms.mff.cuni.cz)
@@ -21,34 +21,34 @@
 #include <linux/time.h>
 #include <linux/fs.h>
 #include <linux/jbd.h>
-#include <linux/ext3_fs.h>
-#include <linux/ext3_jbd.h>
+#include <linux/ext4_fs.h>
+#include <linux/ext4_jbd.h>
 #include "xattr.h"
 #include "acl.h"
 
 /*
  * Called when an inode is released. Note that this is different
- * from ext3_file_open: open gets called at every open, but release
+ * from ext4_file_open: open gets called at every open, but release
  * gets called only when /all/ the files are closed.
  */
-static int ext3_release_file (struct inode * inode, struct file * filp)
+static int ext4_release_file (struct inode * inode, struct file * filp)
 {
 	/* if we are the last writer on the inode, drop the block reservation */
 	if ((filp->f_mode & FMODE_WRITE) &&
 			(atomic_read(&inode->i_writecount) == 1))
 	{
-		mutex_lock(&EXT3_I(inode)->truncate_mutex);
-		ext3_discard_reservation(inode);
-		mutex_unlock(&EXT3_I(inode)->truncate_mutex);
+		mutex_lock(&EXT4_I(inode)->truncate_mutex);
+		ext4_discard_reservation(inode);
+		mutex_unlock(&EXT4_I(inode)->truncate_mutex);
 	}
 	if (is_dx(inode) && filp->private_data)
-		ext3_htree_free_dir_info(filp->private_data);
+		ext4_htree_free_dir_info(filp->private_data);
 
 	return 0;
 }
 
 static ssize_t
-ext3_file_write(struct kiocb *iocb, const struct iovec *iov,
+ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
 		unsigned long nr_segs, loff_t pos)
 {
 	struct file *file = iocb->ki_filp;
@@ -79,7 +79,7 @@ ext3_file_write(struct kiocb *iocb, const struct iovec *iov,
 		 * Open question --- do we care about flushing timestamps too
 		 * if the inode is IS_SYNC?
 		 */
-		if (!ext3_should_journal_data(inode))
+		if (!ext4_should_journal_data(inode))
 			return ret;
 
 		goto force_commit;
@@ -100,40 +100,40 @@ ext3_file_write(struct kiocb *iocb, const struct iovec *iov,
 	 */
 
 force_commit:
-	err = ext3_force_commit(inode->i_sb);
+	err = ext4_force_commit(inode->i_sb);
 	if (err)
 		return err;
 	return ret;
 }
 
-const struct file_operations ext3_file_operations = {
+const struct file_operations ext4_file_operations = {
 	.llseek		= generic_file_llseek,
 	.read		= do_sync_read,
 	.write		= do_sync_write,
 	.aio_read	= generic_file_aio_read,
-	.aio_write	= ext3_file_write,
-	.ioctl		= ext3_ioctl,
+	.aio_write	= ext4_file_write,
+	.ioctl		= ext4_ioctl,
 #ifdef CONFIG_COMPAT
-	.compat_ioctl	= ext3_compat_ioctl,
+	.compat_ioctl	= ext4_compat_ioctl,
 #endif
 	.mmap		= generic_file_mmap,
 	.open		= generic_file_open,
-	.release	= ext3_release_file,
-	.fsync		= ext3_sync_file,
+	.release	= ext4_release_file,
+	.fsync		= ext4_sync_file,
 	.sendfile	= generic_file_sendfile,
 	.splice_read	= generic_file_splice_read,
 	.splice_write	= generic_file_splice_write,
 };
 
-struct inode_operations ext3_file_inode_operations = {
-	.truncate	= ext3_truncate,
-	.setattr	= ext3_setattr,
-#ifdef CONFIG_EXT3_FS_XATTR
+struct inode_operations ext4_file_inode_operations = {
+	.truncate	= ext4_truncate,
+	.setattr	= ext4_setattr,
+#ifdef CONFIG_EXT4DEV_FS_XATTR
 	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,
-	.listxattr	= ext3_listxattr,
+	.listxattr	= ext4_listxattr,
 	.removexattr	= generic_removexattr,
 #endif
-	.permission	= ext3_permission,
+	.permission	= ext4_permission,
 };
 
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index dd1fd3c..272faa2 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -1,5 +1,5 @@
 /*
- *  linux/fs/ext3/fsync.c
+ *  linux/fs/ext4/fsync.c
  *
  *  Copyright (C) 1993  Stephen Tweedie (sct@redhat.com)
  *  from
@@ -9,7 +9,7 @@
  *  from
  *  linux/fs/minix/truncate.c   Copyright (C) 1991, 1992  Linus Torvalds
  *
- *  ext3fs fsync primitive
+ *  ext4fs fsync primitive
  *
  *  Big-endian to little-endian byte-swapping/bitmaps by
  *        David S. Miller (davem@caip.rutgers.edu), 1995
@@ -27,11 +27,11 @@
 #include <linux/sched.h>
 #include <linux/writeback.h>
 #include <linux/jbd.h>
-#include <linux/ext3_fs.h>
-#include <linux/ext3_jbd.h>
+#include <linux/ext4_fs.h>
+#include <linux/ext4_jbd.h>
 
 /*
- * akpm: A new design for ext3_sync_file().
+ * akpm: A new design for ext4_sync_file().
  *
  * This is only called from sys_fsync(), sys_fdatasync() and sys_msync().
  * There cannot be a transaction open by this task.
@@ -42,12 +42,12 @@
  * inode to disk.
  */
 
-int ext3_sync_file(struct file * file, struct dentry *dentry, int datasync)
+int ext4_sync_file(struct file * file, struct dentry *dentry, int datasync)
 {
 	struct inode *inode = dentry->d_inode;
 	int ret = 0;
 
-	J_ASSERT(ext3_journal_current_handle() == 0);
+	J_ASSERT(ext4_journal_current_handle() == 0);
 
 	/*
 	 * data=writeback:
@@ -61,14 +61,14 @@ int ext3_sync_file(struct file * file, struct dentry *dentry, int datasync)
 	 *
 	 * data=journal:
 	 *  filemap_fdatawrite won't do anything (the buffers are clean).
-	 *  ext3_force_commit will write the file data into the journal and
+	 *  ext4_force_commit will write the file data into the journal and
 	 *  will wait on that.
 	 *  filemap_fdatawait() will encounter a ton of newly-dirtied pages
 	 *  (they were dirtied by commit).  But that's OK - the blocks are
 	 *  safe in-journal, which is all fsync() needs to ensure.
 	 */
-	if (ext3_should_journal_data(inode)) {
-		ret = ext3_force_commit(inode->i_sb);
+	if (ext4_should_journal_data(inode)) {
+		ret = ext4_force_commit(inode->i_sb);
 		goto out;
 	}
 
diff --git a/fs/ext4/hash.c b/fs/ext4/hash.c
index deeb27b..d15bb42 100644
--- a/fs/ext4/hash.c
+++ b/fs/ext4/hash.c
@@ -1,5 +1,5 @@
 /*
- *  linux/fs/ext3/hash.c
+ *  linux/fs/ext4/hash.c
  *
  * Copyright (C) 2002 by Theodore Ts'o
  *
@@ -12,7 +12,7 @@
 #include <linux/fs.h>
 #include <linux/jbd.h>
 #include <linux/sched.h>
-#include <linux/ext3_fs.h>
+#include <linux/ext4_fs.h>
 #include <linux/cryptohash.h>
 
 #define DELTA 0x9E3779B9
@@ -89,7 +89,7 @@ static void str2hashbuf(const char *msg, int len, __u32 *buf, int num)
  * represented, and whether or not the returned hash is 32 bits or 64
  * bits.  32 bit hashes will return 0 for the minor hash.
  */
-int ext3fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
+int ext4fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
 {
 	__u32	hash;
 	__u32	minor_hash = 0;
@@ -144,8 +144,8 @@ int ext3fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
 		return -1;
 	}
 	hash = hash & ~1;
-	if (hash == (EXT3_HTREE_EOF << 1))
-		hash = (EXT3_HTREE_EOF-1) << 1;
+	if (hash == (EXT4_HTREE_EOF << 1))
+		hash = (EXT4_HTREE_EOF-1) << 1;
 	hinfo->hash = hash;
 	hinfo->minor_hash = minor_hash;
 	return 0;
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index e45dbd6..4b92066 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -1,5 +1,5 @@
 /*
- *  linux/fs/ext3/ialloc.c
+ *  linux/fs/ext4/ialloc.c
  *
  * Copyright (C) 1992, 1993, 1994, 1995
  * Remy Card (card@masi.ibp.fr)
@@ -15,8 +15,8 @@
 #include <linux/time.h>
 #include <linux/fs.h>
 #include <linux/jbd.h>
-#include <linux/ext3_fs.h>
-#include <linux/ext3_jbd.h>
+#include <linux/ext4_fs.h>
+#include <linux/ext4_jbd.h>
 #include <linux/stat.h>
 #include <linux/string.h>
 #include <linux/quotaops.h>
@@ -53,16 +53,16 @@
 static struct buffer_head *
 read_inode_bitmap(struct super_block * sb, unsigned long block_group)
 {
-	struct ext3_group_desc *desc;
+	struct ext4_group_desc *desc;
 	struct buffer_head *bh = NULL;
 
-	desc = ext3_get_group_desc(sb, block_group, NULL);
+	desc = ext4_get_group_desc(sb, block_group, NULL);
 	if (!desc)
 		goto error_out;
 
 	bh = sb_bread(sb, le32_to_cpu(desc->bg_inode_bitmap));
 	if (!bh)
-		ext3_error(sb, "read_inode_bitmap",
+		ext4_error(sb, "read_inode_bitmap",
 			    "Cannot read inode bitmap - "
 			    "block_group = %lu, inode_bitmap = %u",
 			    block_group, le32_to_cpu(desc->bg_inode_bitmap));
@@ -86,7 +86,7 @@ error_out:
  * though), and then we'd have two inodes sharing the
  * same inode number and space on the harddisk.
  */
-void ext3_free_inode (handle_t *handle, struct inode * inode)
+void ext4_free_inode (handle_t *handle, struct inode * inode)
 {
 	struct super_block * sb = inode->i_sb;
 	int is_directory;
@@ -95,36 +95,36 @@ void ext3_free_inode (handle_t *handle, struct inode * inode)
 	struct buffer_head *bh2;
 	unsigned long block_group;
 	unsigned long bit;
-	struct ext3_group_desc * gdp;
-	struct ext3_super_block * es;
-	struct ext3_sb_info *sbi;
+	struct ext4_group_desc * gdp;
+	struct ext4_super_block * es;
+	struct ext4_sb_info *sbi;
 	int fatal = 0, err;
 
 	if (atomic_read(&inode->i_count) > 1) {
-		printk ("ext3_free_inode: inode has count=%d\n",
+		printk ("ext4_free_inode: inode has count=%d\n",
 					atomic_read(&inode->i_count));
 		return;
 	}
 	if (inode->i_nlink) {
-		printk ("ext3_free_inode: inode has nlink=%d\n",
+		printk ("ext4_free_inode: inode has nlink=%d\n",
 			inode->i_nlink);
 		return;
 	}
 	if (!sb) {
-		printk("ext3_free_inode: inode on nonexistent device\n");
+		printk("ext4_free_inode: inode on nonexistent device\n");
 		return;
 	}
-	sbi = EXT3_SB(sb);
+	sbi = EXT4_SB(sb);
 
 	ino = inode->i_ino;
-	ext3_debug ("freeing inode %lu\n", ino);
+	ext4_debug ("freeing inode %lu\n", ino);
 
 	/*
 	 * Note: we must free any quota before locking the superblock,
 	 * as writing the quota to disk may need the lock as well.
 	 */
 	DQUOT_INIT(inode);
-	ext3_xattr_delete_inode(handle, inode);
+	ext4_xattr_delete_inode(handle, inode);
 	DQUOT_FREE_INODE(inode);
 	DQUOT_DROP(inode);
 
@@ -133,33 +133,33 @@ void ext3_free_inode (handle_t *handle, struct inode * inode)
 	/* Do this BEFORE marking the inode not in use or returning an error */
 	clear_inode (inode);
 
-	es = EXT3_SB(sb)->s_es;
-	if (ino < EXT3_FIRST_INO(sb) || ino > le32_to_cpu(es->s_inodes_count)) {
-		ext3_error (sb, "ext3_free_inode",
+	es = EXT4_SB(sb)->s_es;
+	if (ino < EXT4_FIRST_INO(sb) || ino > le32_to_cpu(es->s_inodes_count)) {
+		ext4_error (sb, "ext4_free_inode",
 			    "reserved or nonexistent inode %lu", ino);
 		goto error_return;
 	}
-	block_group = (ino - 1) / EXT3_INODES_PER_GROUP(sb);
-	bit = (ino - 1) % EXT3_INODES_PER_GROUP(sb);
+	block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb);
+	bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb);
 	bitmap_bh = read_inode_bitmap(sb, block_group);
 	if (!bitmap_bh)
 		goto error_return;
 
 	BUFFER_TRACE(bitmap_bh, "get_write_access");
-	fatal = ext3_journal_get_write_access(handle, bitmap_bh);
+	fatal = ext4_journal_get_write_access(handle, bitmap_bh);
 	if (fatal)
 		goto error_return;
 
 	/* Ok, now we can actually update the inode bitmaps.. */
-	if (!ext3_clear_bit_atomic(sb_bgl_lock(sbi, block_group),
+	if (!ext4_clear_bit_atomic(sb_bgl_lock(sbi, block_group),
 					bit, bitmap_bh->b_data))
-		ext3_error (sb, "ext3_free_inode",
+		ext4_error (sb, "ext4_free_inode",
 			      "bit already cleared for inode %lu", ino);
 	else {
-		gdp = ext3_get_group_desc (sb, block_group, &bh2);
+		gdp = ext4_get_group_desc (sb, block_group, &bh2);
 
 		BUFFER_TRACE(bh2, "get_write_access");
-		fatal = ext3_journal_get_write_access(handle, bh2);
+		fatal = ext4_journal_get_write_access(handle, bh2);
 		if (fatal) goto error_return;
 
 		if (gdp) {
@@ -175,18 +175,18 @@ void ext3_free_inode (handle_t *handle, struct inode * inode)
 				percpu_counter_dec(&sbi->s_dirs_counter);
 
 		}
-		BUFFER_TRACE(bh2, "call ext3_journal_dirty_metadata");
-		err = ext3_journal_dirty_metadata(handle, bh2);
+		BUFFER_TRACE(bh2, "call ext4_journal_dirty_metadata");
+		err = ext4_journal_dirty_metadata(handle, bh2);
 		if (!fatal) fatal = err;
 	}
-	BUFFER_TRACE(bitmap_bh, "call ext3_journal_dirty_metadata");
-	err = ext3_journal_dirty_metadata(handle, bitmap_bh);
+	BUFFER_TRACE(bitmap_bh, "call ext4_journal_dirty_metadata");
+	err = ext4_journal_dirty_metadata(handle, bitmap_bh);
 	if (!fatal)
 		fatal = err;
 	sb->s_dirt = 1;
 error_return:
 	brelse(bitmap_bh);
-	ext3_std_error(sb, fatal);
+	ext4_std_error(sb, fatal);
 }
 
 /*
@@ -201,17 +201,17 @@ error_return:
  */
 static int find_group_dir(struct super_block *sb, struct inode *parent)
 {
-	int ngroups = EXT3_SB(sb)->s_groups_count;
+	int ngroups = EXT4_SB(sb)->s_groups_count;
 	unsigned int freei, avefreei;
-	struct ext3_group_desc *desc, *best_desc = NULL;
+	struct ext4_group_desc *desc, *best_desc = NULL;
 	struct buffer_head *bh;
 	int group, best_group = -1;
 
-	freei = percpu_counter_read_positive(&EXT3_SB(sb)->s_freeinodes_counter);
+	freei = percpu_counter_read_positive(&EXT4_SB(sb)->s_freeinodes_counter);
 	avefreei = freei / ngroups;
 
 	for (group = 0; group < ngroups; group++) {
-		desc = ext3_get_group_desc (sb, group, &bh);
+		desc = ext4_get_group_desc (sb, group, &bh);
 		if (!desc || !desc->bg_free_inodes_count)
 			continue;
 		if (le16_to_cpu(desc->bg_free_inodes_count) < avefreei)
@@ -256,19 +256,19 @@ static int find_group_dir(struct super_block *sb, struct inode *parent)
 
 static int find_group_orlov(struct super_block *sb, struct inode *parent)
 {
-	int parent_group = EXT3_I(parent)->i_block_group;
-	struct ext3_sb_info *sbi = EXT3_SB(sb);
-	struct ext3_super_block *es = sbi->s_es;
+	int parent_group = EXT4_I(parent)->i_block_group;
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	struct ext4_super_block *es = sbi->s_es;
 	int ngroups = sbi->s_groups_count;
-	int inodes_per_group = EXT3_INODES_PER_GROUP(sb);
+	int inodes_per_group = EXT4_INODES_PER_GROUP(sb);
 	unsigned int freei, avefreei;
-	ext3_fsblk_t freeb, avefreeb;
-	ext3_fsblk_t blocks_per_dir;
+	ext4_fsblk_t freeb, avefreeb;
+	ext4_fsblk_t blocks_per_dir;
 	unsigned int ndirs;
 	int max_debt, max_dirs, min_inodes;
-	ext3_grpblk_t min_blocks;
+	ext4_grpblk_t min_blocks;
 	int group = -1, i;
-	struct ext3_group_desc *desc;
+	struct ext4_group_desc *desc;
 	struct buffer_head *bh;
 
 	freei = percpu_counter_read_positive(&sbi->s_freeinodes_counter);
@@ -278,7 +278,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent)
 	ndirs = percpu_counter_read_positive(&sbi->s_dirs_counter);
 
 	if ((parent == sb->s_root->d_inode) ||
-	    (EXT3_I(parent)->i_flags & EXT3_TOPDIR_FL)) {
+	    (EXT4_I(parent)->i_flags & EXT4_TOPDIR_FL)) {
 		int best_ndir = inodes_per_group;
 		int best_group = -1;
 
@@ -286,7 +286,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent)
 		parent_group = (unsigned)group % ngroups;
 		for (i = 0; i < ngroups; i++) {
 			group = (parent_group + i) % ngroups;
-			desc = ext3_get_group_desc (sb, group, &bh);
+			desc = ext4_get_group_desc (sb, group, &bh);
 			if (!desc || !desc->bg_free_inodes_count)
 				continue;
 			if (le16_to_cpu(desc->bg_used_dirs_count) >= best_ndir)
@@ -307,9 +307,9 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent)
 
 	max_dirs = ndirs / ngroups + inodes_per_group / 16;
 	min_inodes = avefreei - inodes_per_group / 4;
-	min_blocks = avefreeb - EXT3_BLOCKS_PER_GROUP(sb) / 4;
+	min_blocks = avefreeb - EXT4_BLOCKS_PER_GROUP(sb) / 4;
 
-	max_debt = EXT3_BLOCKS_PER_GROUP(sb) / max(blocks_per_dir, (ext3_fsblk_t)BLOCK_COST);
+	max_debt = EXT4_BLOCKS_PER_GROUP(sb) / max(blocks_per_dir, (ext4_fsblk_t)BLOCK_COST);
 	if (max_debt * INODE_COST > inodes_per_group)
 		max_debt = inodes_per_group / INODE_COST;
 	if (max_debt > 255)
@@ -319,7 +319,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent)
 
 	for (i = 0; i < ngroups; i++) {
 		group = (parent_group + i) % ngroups;
-		desc = ext3_get_group_desc (sb, group, &bh);
+		desc = ext4_get_group_desc (sb, group, &bh);
 		if (!desc || !desc->bg_free_inodes_count)
 			continue;
 		if (le16_to_cpu(desc->bg_used_dirs_count) >= max_dirs)
@@ -334,7 +334,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent)
 fallback:
 	for (i = 0; i < ngroups; i++) {
 		group = (parent_group + i) % ngroups;
-		desc = ext3_get_group_desc (sb, group, &bh);
+		desc = ext4_get_group_desc (sb, group, &bh);
 		if (!desc || !desc->bg_free_inodes_count)
 			continue;
 		if (le16_to_cpu(desc->bg_free_inodes_count) >= avefreei)
@@ -355,9 +355,9 @@ fallback:
 
 static int find_group_other(struct super_block *sb, struct inode *parent)
 {
-	int parent_group = EXT3_I(parent)->i_block_group;
-	int ngroups = EXT3_SB(sb)->s_groups_count;
-	struct ext3_group_desc *desc;
+	int parent_group = EXT4_I(parent)->i_block_group;
+	int ngroups = EXT4_SB(sb)->s_groups_count;
+	struct ext4_group_desc *desc;
 	struct buffer_head *bh;
 	int group, i;
 
@@ -365,7 +365,7 @@ static int find_group_other(struct super_block *sb, struct inode *parent)
 	 * Try to place the inode in its parent directory
 	 */
 	group = parent_group;
-	desc = ext3_get_group_desc (sb, group, &bh);
+	desc = ext4_get_group_desc (sb, group, &bh);
 	if (desc && le16_to_cpu(desc->bg_free_inodes_count) &&
 			le16_to_cpu(desc->bg_free_blocks_count))
 		return group;
@@ -389,7 +389,7 @@ static int find_group_other(struct super_block *sb, struct inode *parent)
 		group += i;
 		if (group >= ngroups)
 			group -= ngroups;
-		desc = ext3_get_group_desc (sb, group, &bh);
+		desc = ext4_get_group_desc (sb, group, &bh);
 		if (desc && le16_to_cpu(desc->bg_free_inodes_count) &&
 				le16_to_cpu(desc->bg_free_blocks_count))
 			return group;
@@ -403,7 +403,7 @@ static int find_group_other(struct super_block *sb, struct inode *parent)
 	for (i = 0; i < ngroups; i++) {
 		if (++group >= ngroups)
 			group = 0;
-		desc = ext3_get_group_desc (sb, group, &bh);
+		desc = ext4_get_group_desc (sb, group, &bh);
 		if (desc && le16_to_cpu(desc->bg_free_inodes_count))
 			return group;
 	}
@@ -421,7 +421,7 @@ static int find_group_other(struct super_block *sb, struct inode *parent)
  * For other inodes, search forward from the parent directory's block
  * group to find a free inode.
  */
-struct inode *ext3_new_inode(handle_t *handle, struct inode * dir, int mode)
+struct inode *ext4_new_inode(handle_t *handle, struct inode * dir, int mode)
 {
 	struct super_block *sb;
 	struct buffer_head *bitmap_bh = NULL;
@@ -429,10 +429,10 @@ struct inode *ext3_new_inode(handle_t *handle, struct inode * dir, int mode)
 	int group;
 	unsigned long ino = 0;
 	struct inode * inode;
-	struct ext3_group_desc * gdp = NULL;
-	struct ext3_super_block * es;
-	struct ext3_inode_info *ei;
-	struct ext3_sb_info *sbi;
+	struct ext4_group_desc * gdp = NULL;
+	struct ext4_super_block * es;
+	struct ext4_inode_info *ei;
+	struct ext4_sb_info *sbi;
 	int err = 0;
 	struct inode *ret;
 	int i;
@@ -445,9 +445,9 @@ struct inode *ext3_new_inode(handle_t *handle, struct inode * dir, int mode)
 	inode = new_inode(sb);
 	if (!inode)
 		return ERR_PTR(-ENOMEM);
-	ei = EXT3_I(inode);
+	ei = EXT4_I(inode);
 
-	sbi = EXT3_SB(sb);
+	sbi = EXT4_SB(sb);
 	es = sbi->s_es;
 	if (S_ISDIR(mode)) {
 		if (test_opt (sb, OLDALLOC))
@@ -464,7 +464,7 @@ struct inode *ext3_new_inode(handle_t *handle, struct inode * dir, int mode)
 	for (i = 0; i < sbi->s_groups_count; i++) {
 		err = -EIO;
 
-		gdp = ext3_get_group_desc(sb, group, &bh2);
+		gdp = ext4_get_group_desc(sb, group, &bh2);
 		if (!gdp)
 			goto fail;
 
@@ -476,21 +476,21 @@ struct inode *ext3_new_inode(handle_t *handle, struct inode * dir, int mode)
 		ino = 0;
 
 repeat_in_this_group:
-		ino = ext3_find_next_zero_bit((unsigned long *)
-				bitmap_bh->b_data, EXT3_INODES_PER_GROUP(sb), ino);
-		if (ino < EXT3_INODES_PER_GROUP(sb)) {
+		ino = ext4_find_next_zero_bit((unsigned long *)
+				bitmap_bh->b_data, EXT4_INODES_PER_GROUP(sb), ino);
+		if (ino < EXT4_INODES_PER_GROUP(sb)) {
 
 			BUFFER_TRACE(bitmap_bh, "get_write_access");
-			err = ext3_journal_get_write_access(handle, bitmap_bh);
+			err = ext4_journal_get_write_access(handle, bitmap_bh);
 			if (err)
 				goto fail;
 
-			if (!ext3_set_bit_atomic(sb_bgl_lock(sbi, group),
+			if (!ext4_set_bit_atomic(sb_bgl_lock(sbi, group),
 						ino, bitmap_bh->b_data)) {
 				/* we won it */
 				BUFFER_TRACE(bitmap_bh,
-					"call ext3_journal_dirty_metadata");
-				err = ext3_journal_dirty_metadata(handle,
+					"call ext4_journal_dirty_metadata");
+				err = ext4_journal_dirty_metadata(handle,
 								bitmap_bh);
 				if (err)
 					goto fail;
@@ -499,7 +499,7 @@ repeat_in_this_group:
 			/* we lost it */
 			journal_release_buffer(handle, bitmap_bh);
 
-			if (++ino < EXT3_INODES_PER_GROUP(sb))
+			if (++ino < EXT4_INODES_PER_GROUP(sb))
 				goto repeat_in_this_group;
 		}
 
@@ -517,9 +517,9 @@ repeat_in_this_group:
 	goto out;
 
 got:
-	ino += group * EXT3_INODES_PER_GROUP(sb) + 1;
-	if (ino < EXT3_FIRST_INO(sb) || ino > le32_to_cpu(es->s_inodes_count)) {
-		ext3_error (sb, "ext3_new_inode",
+	ino += group * EXT4_INODES_PER_GROUP(sb) + 1;
+	if (ino < EXT4_FIRST_INO(sb) || ino > le32_to_cpu(es->s_inodes_count)) {
+		ext4_error (sb, "ext4_new_inode",
 			    "reserved inode or inode > inodes count - "
 			    "block_group = %d, inode=%lu", group, ino);
 		err = -EIO;
@@ -527,7 +527,7 @@ got:
 	}
 
 	BUFFER_TRACE(bh2, "get_write_access");
-	err = ext3_journal_get_write_access(handle, bh2);
+	err = ext4_journal_get_write_access(handle, bh2);
 	if (err) goto fail;
 	spin_lock(sb_bgl_lock(sbi, group));
 	gdp->bg_free_inodes_count =
@@ -537,8 +537,8 @@ got:
 			cpu_to_le16(le16_to_cpu(gdp->bg_used_dirs_count) + 1);
 	}
 	spin_unlock(sb_bgl_lock(sbi, group));
-	BUFFER_TRACE(bh2, "call ext3_journal_dirty_metadata");
-	err = ext3_journal_dirty_metadata(handle, bh2);
+	BUFFER_TRACE(bh2, "call ext4_journal_dirty_metadata");
+	err = ext4_journal_dirty_metadata(handle, bh2);
 	if (err) goto fail;
 
 	percpu_counter_dec(&sbi->s_freeinodes_counter);
@@ -566,13 +566,13 @@ got:
 	ei->i_dir_start_lookup = 0;
 	ei->i_disksize = 0;
 
-	ei->i_flags = EXT3_I(dir)->i_flags & ~EXT3_INDEX_FL;
+	ei->i_flags = EXT4_I(dir)->i_flags & ~EXT4_INDEX_FL;
 	if (S_ISLNK(mode))
-		ei->i_flags &= ~(EXT3_IMMUTABLE_FL|EXT3_APPEND_FL);
+		ei->i_flags &= ~(EXT4_IMMUTABLE_FL|EXT4_APPEND_FL);
 	/* dirsync only applies to directories */
 	if (!S_ISDIR(mode))
-		ei->i_flags &= ~EXT3_DIRSYNC_FL;
-#ifdef EXT3_FRAGMENTS
+		ei->i_flags &= ~EXT4_DIRSYNC_FL;
+#ifdef EXT4_FRAGMENTS
 	ei->i_faddr = 0;
 	ei->i_frag_no = 0;
 	ei->i_frag_size = 0;
@@ -583,7 +583,7 @@ got:
 	ei->i_block_alloc_info = NULL;
 	ei->i_block_group = group;
 
-	ext3_set_inode_flags(inode);
+	ext4_set_inode_flags(inode);
 	if (IS_DIRSYNC(inode))
 		handle->h_sync = 1;
 	insert_inode_hash(inode);
@@ -591,10 +591,10 @@ got:
 	inode->i_generation = sbi->s_next_generation++;
 	spin_unlock(&sbi->s_next_gen_lock);
 
-	ei->i_state = EXT3_STATE_NEW;
+	ei->i_state = EXT4_STATE_NEW;
 	ei->i_extra_isize =
-		(EXT3_INODE_SIZE(inode->i_sb) > EXT3_GOOD_OLD_INODE_SIZE) ?
-		sizeof(struct ext3_inode) - EXT3_GOOD_OLD_INODE_SIZE : 0;
+		(EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) ?
+		sizeof(struct ext4_inode) - EXT4_GOOD_OLD_INODE_SIZE : 0;
 
 	ret = inode;
 	if(DQUOT_ALLOC_INODE(inode)) {
@@ -602,24 +602,24 @@ got:
 		goto fail_drop;
 	}
 
-	err = ext3_init_acl(handle, inode, dir);
+	err = ext4_init_acl(handle, inode, dir);
 	if (err)
 		goto fail_free_drop;
 
-	err = ext3_init_security(handle,inode, dir);
+	err = ext4_init_security(handle,inode, dir);
 	if (err)
 		goto fail_free_drop;
 
-	err = ext3_mark_inode_dirty(handle, inode);
+	err = ext4_mark_inode_dirty(handle, inode);
 	if (err) {
-		ext3_std_error(sb, err);
+		ext4_std_error(sb, err);
 		goto fail_free_drop;
 	}
 
-	ext3_debug("allocating inode %lu\n", inode->i_ino);
+	ext4_debug("allocating inode %lu\n", inode->i_ino);
 	goto really_out;
 fail:
-	ext3_std_error(sb, err);
+	ext4_std_error(sb, err);
 out:
 	iput(inode);
 	ret = ERR_PTR(err);
@@ -640,9 +640,9 @@ fail_drop:
 }
 
 /* Verify that we are loading a valid orphan from disk */
-struct inode *ext3_orphan_get(struct super_block *sb, unsigned long ino)
+struct inode *ext4_orphan_get(struct super_block *sb, unsigned long ino)
 {
-	unsigned long max_ino = le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count);
+	unsigned long max_ino = le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count);
 	unsigned long block_group;
 	int bit;
 	struct buffer_head *bitmap_bh = NULL;
@@ -650,16 +650,16 @@ struct inode *ext3_orphan_get(struct super_block *sb, unsigned long ino)
 
 	/* Error cases - e2fsck has already cleaned up for us */
 	if (ino > max_ino) {
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "bad orphan ino %lu!  e2fsck was run?", ino);
 		goto out;
 	}
 
-	block_group = (ino - 1) / EXT3_INODES_PER_GROUP(sb);
-	bit = (ino - 1) % EXT3_INODES_PER_GROUP(sb);
+	block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb);
+	bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb);
 	bitmap_bh = read_inode_bitmap(sb, block_group);
 	if (!bitmap_bh) {
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "inode bitmap error for orphan %lu", ino);
 		goto out;
 	}
@@ -668,14 +668,14 @@ struct inode *ext3_orphan_get(struct super_block *sb, unsigned long ino)
 	 * is a valid orphan (no e2fsck run on fs).  Orphans also include
 	 * inodes that were being truncated, so we can't check i_nlink==0.
 	 */
-	if (!ext3_test_bit(bit, bitmap_bh->b_data) ||
+	if (!ext4_test_bit(bit, bitmap_bh->b_data) ||
 			!(inode = iget(sb, ino)) || is_bad_inode(inode) ||
 			NEXT_ORPHAN(inode) > max_ino) {
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "bad orphan inode %lu!  e2fsck was run?", ino);
-		printk(KERN_NOTICE "ext3_test_bit(bit=%d, block=%llu) = %d\n",
+		printk(KERN_NOTICE "ext4_test_bit(bit=%d, block=%llu) = %d\n",
 		       bit, (unsigned long long)bitmap_bh->b_blocknr,
-		       ext3_test_bit(bit, bitmap_bh->b_data));
+		       ext4_test_bit(bit, bitmap_bh->b_data));
 		printk(KERN_NOTICE "inode=%p\n", inode);
 		if (inode) {
 			printk(KERN_NOTICE "is_bad_inode(inode)=%d\n",
@@ -695,22 +695,22 @@ out:
 	return inode;
 }
 
-unsigned long ext3_count_free_inodes (struct super_block * sb)
+unsigned long ext4_count_free_inodes (struct super_block * sb)
 {
 	unsigned long desc_count;
-	struct ext3_group_desc *gdp;
+	struct ext4_group_desc *gdp;
 	int i;
-#ifdef EXT3FS_DEBUG
-	struct ext3_super_block *es;
+#ifdef EXT4FS_DEBUG
+	struct ext4_super_block *es;
 	unsigned long bitmap_count, x;
 	struct buffer_head *bitmap_bh = NULL;
 
-	es = EXT3_SB(sb)->s_es;
+	es = EXT4_SB(sb)->s_es;
 	desc_count = 0;
 	bitmap_count = 0;
 	gdp = NULL;
-	for (i = 0; i < EXT3_SB(sb)->s_groups_count; i++) {
-		gdp = ext3_get_group_desc (sb, i, NULL);
+	for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) {
+		gdp = ext4_get_group_desc (sb, i, NULL);
 		if (!gdp)
 			continue;
 		desc_count += le16_to_cpu(gdp->bg_free_inodes_count);
@@ -719,19 +719,19 @@ unsigned long ext3_count_free_inodes (struct super_block * sb)
 		if (!bitmap_bh)
 			continue;
 
-		x = ext3_count_free(bitmap_bh, EXT3_INODES_PER_GROUP(sb) / 8);
+		x = ext4_count_free(bitmap_bh, EXT4_INODES_PER_GROUP(sb) / 8);
 		printk("group %d: stored = %d, counted = %lu\n",
 			i, le16_to_cpu(gdp->bg_free_inodes_count), x);
 		bitmap_count += x;
 	}
 	brelse(bitmap_bh);
-	printk("ext3_count_free_inodes: stored = %u, computed = %lu, %lu\n",
+	printk("ext4_count_free_inodes: stored = %u, computed = %lu, %lu\n",
 		le32_to_cpu(es->s_free_inodes_count), desc_count, bitmap_count);
 	return desc_count;
 #else
 	desc_count = 0;
-	for (i = 0; i < EXT3_SB(sb)->s_groups_count; i++) {
-		gdp = ext3_get_group_desc (sb, i, NULL);
+	for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) {
+		gdp = ext4_get_group_desc (sb, i, NULL);
 		if (!gdp)
 			continue;
 		desc_count += le16_to_cpu(gdp->bg_free_inodes_count);
@@ -742,13 +742,13 @@ unsigned long ext3_count_free_inodes (struct super_block * sb)
 }
 
 /* Called at mount-time, super-block is locked */
-unsigned long ext3_count_dirs (struct super_block * sb)
+unsigned long ext4_count_dirs (struct super_block * sb)
 {
 	unsigned long count = 0;
 	int i;
 
-	for (i = 0; i < EXT3_SB(sb)->s_groups_count; i++) {
-		struct ext3_group_desc *gdp = ext3_get_group_desc (sb, i, NULL);
+	for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) {
+		struct ext4_group_desc *gdp = ext4_get_group_desc (sb, i, NULL);
 		if (!gdp)
 			continue;
 		count += le16_to_cpu(gdp->bg_used_dirs_count);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 03ba5bc..7275d60 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1,5 +1,5 @@
 /*
- *  linux/fs/ext3/inode.c
+ *  linux/fs/ext4/inode.c
  *
  * Copyright (C) 1992, 1993, 1994, 1995
  * Remy Card (card@masi.ibp.fr)
@@ -19,13 +19,13 @@
  *  64-bit file support on 64-bit platforms by Jakub Jelinek
  *	(jj@sunsite.ms.mff.cuni.cz)
  *
- *  Assorted race fixes, rewrite of ext3_get_block() by Al Viro, 2000
+ *  Assorted race fixes, rewrite of ext4_get_block() by Al Viro, 2000
  */
 
 #include <linux/module.h>
 #include <linux/fs.h>
 #include <linux/time.h>
-#include <linux/ext3_jbd.h>
+#include <linux/ext4_jbd.h>
 #include <linux/jbd.h>
 #include <linux/smp_lock.h>
 #include <linux/highuid.h>
@@ -40,21 +40,21 @@
 #include "xattr.h"
 #include "acl.h"
 
-static int ext3_writepage_trans_blocks(struct inode *inode);
+static int ext4_writepage_trans_blocks(struct inode *inode);
 
 /*
  * Test whether an inode is a fast symlink.
  */
-static int ext3_inode_is_fast_symlink(struct inode *inode)
+static int ext4_inode_is_fast_symlink(struct inode *inode)
 {
-	int ea_blocks = EXT3_I(inode)->i_file_acl ?
+	int ea_blocks = EXT4_I(inode)->i_file_acl ?
 		(inode->i_sb->s_blocksize >> 9) : 0;
 
 	return (S_ISLNK(inode->i_mode) && inode->i_blocks - ea_blocks == 0);
 }
 
 /*
- * The ext3 forget function must perform a revoke if we are freeing data
+ * The ext4 forget function must perform a revoke if we are freeing data
  * which has been journaled.  Metadata (eg. indirect blocks) must be
  * revoked in all cases.
  *
@@ -62,8 +62,8 @@ static int ext3_inode_is_fast_symlink(struct inode *inode)
  * but there may still be a record of it in the journal, and that record
  * still needs to be revoked.
  */
-int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode,
-			struct buffer_head *bh, ext3_fsblk_t blocknr)
+int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode,
+			struct buffer_head *bh, ext4_fsblk_t blocknr)
 {
 	int err;
 
@@ -81,11 +81,11 @@ int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode,
 	 * support it.  Otherwise, only skip the revoke on un-journaled
 	 * data blocks. */
 
-	if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ||
-	    (!is_metadata && !ext3_should_journal_data(inode))) {
+	if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ||
+	    (!is_metadata && !ext4_should_journal_data(inode))) {
 		if (bh) {
 			BUFFER_TRACE(bh, "call journal_forget");
-			return ext3_journal_forget(handle, bh);
+			return ext4_journal_forget(handle, bh);
 		}
 		return 0;
 	}
@@ -93,10 +93,10 @@ int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode,
 	/*
 	 * data!=journal && (is_metadata || should_journal_data(inode))
 	 */
-	BUFFER_TRACE(bh, "call ext3_journal_revoke");
-	err = ext3_journal_revoke(handle, blocknr, bh);
+	BUFFER_TRACE(bh, "call ext4_journal_revoke");
+	err = ext4_journal_revoke(handle, blocknr, bh);
 	if (err)
-		ext3_abort(inode->i_sb, __FUNCTION__,
+		ext4_abort(inode->i_sb, __FUNCTION__,
 			   "error %d when attempting revoke", err);
 	BUFFER_TRACE(bh, "exit");
 	return err;
@@ -115,7 +115,7 @@ static unsigned long blocks_for_truncate(struct inode *inode)
 	/* Give ourselves just enough room to cope with inodes in which
 	 * i_blocks is corrupt: we've seen disk corruptions in the past
 	 * which resulted in random data in an inode which looked enough
-	 * like a regular file for ext3 to try to delete it.  Things
+	 * like a regular file for ext4 to try to delete it.  Things
 	 * will go a bit crazy if that happens, but at least we should
 	 * try not to panic the whole kernel. */
 	if (needed < 2)
@@ -123,10 +123,10 @@ static unsigned long blocks_for_truncate(struct inode *inode)
 
 	/* But we need to bound the transaction so we don't overflow the
 	 * journal. */
-	if (needed > EXT3_MAX_TRANS_DATA)
-		needed = EXT3_MAX_TRANS_DATA;
+	if (needed > EXT4_MAX_TRANS_DATA)
+		needed = EXT4_MAX_TRANS_DATA;
 
-	return EXT3_DATA_TRANS_BLOCKS(inode->i_sb) + needed;
+	return EXT4_DATA_TRANS_BLOCKS(inode->i_sb) + needed;
 }
 
 /*
@@ -143,11 +143,11 @@ static handle_t *start_transaction(struct inode *inode)
 {
 	handle_t *result;
 
-	result = ext3_journal_start(inode, blocks_for_truncate(inode));
+	result = ext4_journal_start(inode, blocks_for_truncate(inode));
 	if (!IS_ERR(result))
 		return result;
 
-	ext3_std_error(inode->i_sb, PTR_ERR(result));
+	ext4_std_error(inode->i_sb, PTR_ERR(result));
 	return result;
 }
 
@@ -159,9 +159,9 @@ static handle_t *start_transaction(struct inode *inode)
  */
 static int try_to_extend_transaction(handle_t *handle, struct inode *inode)
 {
-	if (handle->h_buffer_credits > EXT3_RESERVE_TRANS_BLOCKS)
+	if (handle->h_buffer_credits > EXT4_RESERVE_TRANS_BLOCKS)
 		return 0;
-	if (!ext3_journal_extend(handle, blocks_for_truncate(inode)))
+	if (!ext4_journal_extend(handle, blocks_for_truncate(inode)))
 		return 0;
 	return 1;
 }
@@ -171,16 +171,16 @@ static int try_to_extend_transaction(handle_t *handle, struct inode *inode)
  * so before we call here everything must be consistently dirtied against
  * this transaction.
  */
-static int ext3_journal_test_restart(handle_t *handle, struct inode *inode)
+static int ext4_journal_test_restart(handle_t *handle, struct inode *inode)
 {
 	jbd_debug(2, "restarting handle %p\n", handle);
-	return ext3_journal_restart(handle, blocks_for_truncate(inode));
+	return ext4_journal_restart(handle, blocks_for_truncate(inode));
 }
 
 /*
  * Called at the last iput() if i_nlink is zero.
  */
-void ext3_delete_inode (struct inode * inode)
+void ext4_delete_inode (struct inode * inode)
 {
 	handle_t *handle;
 
@@ -196,7 +196,7 @@ void ext3_delete_inode (struct inode * inode)
 		 * make sure that the in-core orphan linked list is properly
 		 * cleaned up.
 		 */
-		ext3_orphan_del(NULL, inode);
+		ext4_orphan_del(NULL, inode);
 		goto no_delete;
 	}
 
@@ -204,17 +204,17 @@ void ext3_delete_inode (struct inode * inode)
 		handle->h_sync = 1;
 	inode->i_size = 0;
 	if (inode->i_blocks)
-		ext3_truncate(inode);
+		ext4_truncate(inode);
 	/*
-	 * Kill off the orphan record which ext3_truncate created.
+	 * Kill off the orphan record which ext4_truncate created.
 	 * AKPM: I think this can be inside the above `if'.
-	 * Note that ext3_orphan_del() has to be able to cope with the
+	 * Note that ext4_orphan_del() has to be able to cope with the
 	 * deletion of a non-existent orphan - this is because we don't
-	 * know if ext3_truncate() actually created an orphan record.
+	 * know if ext4_truncate() actually created an orphan record.
 	 * (Well, we could do this if we need to, but heck - it works)
 	 */
-	ext3_orphan_del(handle, inode);
-	EXT3_I(inode)->i_dtime	= get_seconds();
+	ext4_orphan_del(handle, inode);
+	EXT4_I(inode)->i_dtime	= get_seconds();
 
 	/*
 	 * One subtle ordering requirement: if anything has gone wrong
@@ -223,12 +223,12 @@ void ext3_delete_inode (struct inode * inode)
 	 * having errors), but we can't free the inode if the mark_dirty
 	 * fails.
 	 */
-	if (ext3_mark_inode_dirty(handle, inode))
+	if (ext4_mark_inode_dirty(handle, inode))
 		/* If that failed, just do the required in-core inode clear. */
 		clear_inode(inode);
 	else
-		ext3_free_inode(handle, inode);
-	ext3_journal_stop(handle);
+		ext4_free_inode(handle, inode);
+	ext4_journal_stop(handle);
 	return;
 no_delete:
 	clear_inode(inode);	/* We must guarantee clearing of inode... */
@@ -254,14 +254,14 @@ static int verify_chain(Indirect *from, Indirect *to)
 }
 
 /**
- *	ext3_block_to_path - parse the block number into array of offsets
+ *	ext4_block_to_path - parse the block number into array of offsets
  *	@inode: inode in question (we are only interested in its superblock)
  *	@i_block: block number to be parsed
  *	@offsets: array to store the offsets in
  *      @boundary: set this non-zero if the referred-to block is likely to be
  *             followed (on disk) by an indirect block.
  *
- *	To store the locations of file's data ext3 uses a data structure common
+ *	To store the locations of file's data ext4 uses a data structure common
  *	for UNIX filesystems - tree of pointers anchored in the inode, with
  *	data blocks at leaves and indirect blocks in intermediate nodes.
  *	This function translates the block number into path in that tree -
@@ -284,39 +284,39 @@ static int verify_chain(Indirect *from, Indirect *to)
  * get there at all.
  */
 
-static int ext3_block_to_path(struct inode *inode,
+static int ext4_block_to_path(struct inode *inode,
 			long i_block, int offsets[4], int *boundary)
 {
-	int ptrs = EXT3_ADDR_PER_BLOCK(inode->i_sb);
-	int ptrs_bits = EXT3_ADDR_PER_BLOCK_BITS(inode->i_sb);
-	const long direct_blocks = EXT3_NDIR_BLOCKS,
+	int ptrs = EXT4_ADDR_PER_BLOCK(inode->i_sb);
+	int ptrs_bits = EXT4_ADDR_PER_BLOCK_BITS(inode->i_sb);
+	const long direct_blocks = EXT4_NDIR_BLOCKS,
 		indirect_blocks = ptrs,
 		double_blocks = (1 << (ptrs_bits * 2));
 	int n = 0;
 	int final = 0;
 
 	if (i_block < 0) {
-		ext3_warning (inode->i_sb, "ext3_block_to_path", "block < 0");
+		ext4_warning (inode->i_sb, "ext4_block_to_path", "block < 0");
 	} else if (i_block < direct_blocks) {
 		offsets[n++] = i_block;
 		final = direct_blocks;
 	} else if ( (i_block -= direct_blocks) < indirect_blocks) {
-		offsets[n++] = EXT3_IND_BLOCK;
+		offsets[n++] = EXT4_IND_BLOCK;
 		offsets[n++] = i_block;
 		final = ptrs;
 	} else if ((i_block -= indirect_blocks) < double_blocks) {
-		offsets[n++] = EXT3_DIND_BLOCK;
+		offsets[n++] = EXT4_DIND_BLOCK;
 		offsets[n++] = i_block >> ptrs_bits;
 		offsets[n++] = i_block & (ptrs - 1);
 		final = ptrs;
 	} else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
-		offsets[n++] = EXT3_TIND_BLOCK;
+		offsets[n++] = EXT4_TIND_BLOCK;
 		offsets[n++] = i_block >> (ptrs_bits * 2);
 		offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
 		offsets[n++] = i_block & (ptrs - 1);
 		final = ptrs;
 	} else {
-		ext3_warning(inode->i_sb, "ext3_block_to_path", "block > big");
+		ext4_warning(inode->i_sb, "ext4_block_to_path", "block > big");
 	}
 	if (boundary)
 		*boundary = final - 1 - (i_block & (ptrs - 1));
@@ -324,7 +324,7 @@ static int ext3_block_to_path(struct inode *inode,
 }
 
 /**
- *	ext3_get_branch - read the chain of indirect blocks leading to data
+ *	ext4_get_branch - read the chain of indirect blocks leading to data
  *	@inode: inode in question
  *	@depth: depth of the chain (1 - direct pointer, etc.)
  *	@offsets: offsets of pointers in inode/indirect blocks
@@ -352,7 +352,7 @@ static int ext3_block_to_path(struct inode *inode,
  *	or when it reads all @depth-1 indirect blocks successfully and finds
  *	the whole chain, all way to the data (returns %NULL, *err == 0).
  */
-static Indirect *ext3_get_branch(struct inode *inode, int depth, int *offsets,
+static Indirect *ext4_get_branch(struct inode *inode, int depth, int *offsets,
 				 Indirect chain[4], int *err)
 {
 	struct super_block *sb = inode->i_sb;
@@ -361,7 +361,7 @@ static Indirect *ext3_get_branch(struct inode *inode, int depth, int *offsets,
 
 	*err = 0;
 	/* i_data is not going away, no lock needed */
-	add_chain (chain, NULL, EXT3_I(inode)->i_data + *offsets);
+	add_chain (chain, NULL, EXT4_I(inode)->i_data + *offsets);
 	if (!p->key)
 		goto no_block;
 	while (--depth) {
@@ -389,7 +389,7 @@ no_block:
 }
 
 /**
- *	ext3_find_near - find a place for allocation with sufficient locality
+ *	ext4_find_near - find a place for allocation with sufficient locality
  *	@inode: owner
  *	@ind: descriptor of indirect block.
  *
@@ -408,13 +408,13 @@ no_block:
  *
  *	Caller must make sure that @ind is valid and will stay that way.
  */
-static ext3_fsblk_t ext3_find_near(struct inode *inode, Indirect *ind)
+static ext4_fsblk_t ext4_find_near(struct inode *inode, Indirect *ind)
 {
-	struct ext3_inode_info *ei = EXT3_I(inode);
+	struct ext4_inode_info *ei = EXT4_I(inode);
 	__le32 *start = ind->bh ? (__le32*) ind->bh->b_data : ei->i_data;
 	__le32 *p;
-	ext3_fsblk_t bg_start;
-	ext3_grpblk_t colour;
+	ext4_fsblk_t bg_start;
+	ext4_grpblk_t colour;
 
 	/* Try to find previous block */
 	for (p = ind->p - 1; p >= start; p--) {
@@ -430,14 +430,14 @@ static ext3_fsblk_t ext3_find_near(struct inode *inode, Indirect *ind)
 	 * It is going to be referred to from the inode itself? OK, just put it
 	 * into the same cylinder group then.
 	 */
-	bg_start = ext3_group_first_block_no(inode->i_sb, ei->i_block_group);
+	bg_start = ext4_group_first_block_no(inode->i_sb, ei->i_block_group);
 	colour = (current->pid % 16) *
-			(EXT3_BLOCKS_PER_GROUP(inode->i_sb) / 16);
+			(EXT4_BLOCKS_PER_GROUP(inode->i_sb) / 16);
 	return bg_start + colour;
 }
 
 /**
- *	ext3_find_goal - find a prefered place for allocation.
+ *	ext4_find_goal - find a prefered place for allocation.
  *	@inode: owner
  *	@block:  block we want
  *	@chain:  chain of indirect blocks
@@ -448,12 +448,12 @@ static ext3_fsblk_t ext3_find_near(struct inode *inode, Indirect *ind)
  *	stores it in *@goal and returns zero.
  */
 
-static ext3_fsblk_t ext3_find_goal(struct inode *inode, long block,
+static ext4_fsblk_t ext4_find_goal(struct inode *inode, long block,
 		Indirect chain[4], Indirect *partial)
 {
-	struct ext3_block_alloc_info *block_i;
+	struct ext4_block_alloc_info *block_i;
 
-	block_i =  EXT3_I(inode)->i_block_alloc_info;
+	block_i =  EXT4_I(inode)->i_block_alloc_info;
 
 	/*
 	 * try the heuristic for sequential allocation,
@@ -464,11 +464,11 @@ static ext3_fsblk_t ext3_find_goal(struct inode *inode, long block,
 		return block_i->last_alloc_physical_block + 1;
 	}
 
-	return ext3_find_near(inode, partial);
+	return ext4_find_near(inode, partial);
 }
 
 /**
- *	ext3_blks_to_allocate: Look up the block map and count the number
+ *	ext4_blks_to_allocate: Look up the block map and count the number
  *	of direct blocks need to be allocated for the given branch.
  *
  *	@branch: chain of indirect blocks
@@ -479,7 +479,7 @@ static ext3_fsblk_t ext3_find_goal(struct inode *inode, long block,
  *	return the total number of blocks to be allocate, including the
  *	direct and indirect blocks.
  */
-static int ext3_blks_to_allocate(Indirect *branch, int k, unsigned long blks,
+static int ext4_blks_to_allocate(Indirect *branch, int k, unsigned long blks,
 		int blocks_to_boundary)
 {
 	unsigned long count = 0;
@@ -506,7 +506,7 @@ static int ext3_blks_to_allocate(Indirect *branch, int k, unsigned long blks,
 }
 
 /**
- *	ext3_alloc_blocks: multiple allocate blocks needed for a branch
+ *	ext4_alloc_blocks: multiple allocate blocks needed for a branch
  *	@indirect_blks: the number of blocks need to allocate for indirect
  *			blocks
  *
@@ -515,14 +515,14 @@ static int ext3_blks_to_allocate(Indirect *branch, int k, unsigned long blks,
  *	@blks:	on return it will store the total number of allocated
  *		direct blocks
  */
-static int ext3_alloc_blocks(handle_t *handle, struct inode *inode,
-			ext3_fsblk_t goal, int indirect_blks, int blks,
-			ext3_fsblk_t new_blocks[4], int *err)
+static int ext4_alloc_blocks(handle_t *handle, struct inode *inode,
+			ext4_fsblk_t goal, int indirect_blks, int blks,
+			ext4_fsblk_t new_blocks[4], int *err)
 {
 	int target, i;
 	unsigned long count = 0;
 	int index = 0;
-	ext3_fsblk_t current_block = 0;
+	ext4_fsblk_t current_block = 0;
 	int ret = 0;
 
 	/*
@@ -538,7 +538,7 @@ static int ext3_alloc_blocks(handle_t *handle, struct inode *inode,
 	while (1) {
 		count = target;
 		/* allocating blocks for indirect blocks and direct blocks */
-		current_block = ext3_new_blocks(handle,inode,goal,&count,err);
+		current_block = ext4_new_blocks(handle,inode,goal,&count,err);
 		if (*err)
 			goto failed_out;
 
@@ -562,12 +562,12 @@ static int ext3_alloc_blocks(handle_t *handle, struct inode *inode,
 	return ret;
 failed_out:
 	for (i = 0; i <index; i++)
-		ext3_free_blocks(handle, inode, new_blocks[i], 1);
+		ext4_free_blocks(handle, inode, new_blocks[i], 1);
 	return ret;
 }
 
 /**
- *	ext3_alloc_branch - allocate and set up a chain of blocks.
+ *	ext4_alloc_branch - allocate and set up a chain of blocks.
  *	@inode: owner
  *	@indirect_blks: number of allocated indirect blocks
  *	@blks: number of allocated direct blocks
@@ -578,21 +578,21 @@ failed_out:
  *	links them into chain and (if we are synchronous) writes them to disk.
  *	In other words, it prepares a branch that can be spliced onto the
  *	inode. It stores the information about that chain in the branch[], in
- *	the same format as ext3_get_branch() would do. We are calling it after
+ *	the same format as ext4_get_branch() would do. We are calling it after
  *	we had read the existing part of chain and partial points to the last
  *	triple of that (one with zero ->key). Upon the exit we have the same
- *	picture as after the successful ext3_get_block(), except that in one
+ *	picture as after the successful ext4_get_block(), except that in one
  *	place chain is disconnected - *branch->p is still zero (we did not
  *	set the last link), but branch->key contains the number that should
  *	be placed into *branch->p to fill that gap.
  *
  *	If allocation fails we free all blocks we've allocated (and forget
  *	their buffer_heads) and return the error value the from failed
- *	ext3_alloc_block() (normally -ENOSPC). Otherwise we set the chain
+ *	ext4_alloc_block() (normally -ENOSPC). Otherwise we set the chain
  *	as described above and return 0.
  */
-static int ext3_alloc_branch(handle_t *handle, struct inode *inode,
-			int indirect_blks, int *blks, ext3_fsblk_t goal,
+static int ext4_alloc_branch(handle_t *handle, struct inode *inode,
+			int indirect_blks, int *blks, ext4_fsblk_t goal,
 			int *offsets, Indirect *branch)
 {
 	int blocksize = inode->i_sb->s_blocksize;
@@ -600,10 +600,10 @@ static int ext3_alloc_branch(handle_t *handle, struct inode *inode,
 	int err = 0;
 	struct buffer_head *bh;
 	int num;
-	ext3_fsblk_t new_blocks[4];
-	ext3_fsblk_t current_block;
+	ext4_fsblk_t new_blocks[4];
+	ext4_fsblk_t current_block;
 
-	num = ext3_alloc_blocks(handle, inode, goal, indirect_blks,
+	num = ext4_alloc_blocks(handle, inode, goal, indirect_blks,
 				*blks, new_blocks, &err);
 	if (err)
 		return err;
@@ -622,7 +622,7 @@ static int ext3_alloc_branch(handle_t *handle, struct inode *inode,
 		branch[n].bh = bh;
 		lock_buffer(bh);
 		BUFFER_TRACE(bh, "call get_create_access");
-		err = ext3_journal_get_create_access(handle, bh);
+		err = ext4_journal_get_create_access(handle, bh);
 		if (err) {
 			unlock_buffer(bh);
 			brelse(bh);
@@ -647,8 +647,8 @@ static int ext3_alloc_branch(handle_t *handle, struct inode *inode,
 		set_buffer_uptodate(bh);
 		unlock_buffer(bh);
 
-		BUFFER_TRACE(bh, "call ext3_journal_dirty_metadata");
-		err = ext3_journal_dirty_metadata(handle, bh);
+		BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata");
+		err = ext4_journal_dirty_metadata(handle, bh);
 		if (err)
 			goto failed;
 	}
@@ -658,22 +658,22 @@ failed:
 	/* Allocation failed, free what we already allocated */
 	for (i = 1; i <= n ; i++) {
 		BUFFER_TRACE(branch[i].bh, "call journal_forget");
-		ext3_journal_forget(handle, branch[i].bh);
+		ext4_journal_forget(handle, branch[i].bh);
 	}
 	for (i = 0; i <indirect_blks; i++)
-		ext3_free_blocks(handle, inode, new_blocks[i], 1);
+		ext4_free_blocks(handle, inode, new_blocks[i], 1);
 
-	ext3_free_blocks(handle, inode, new_blocks[i], num);
+	ext4_free_blocks(handle, inode, new_blocks[i], num);
 
 	return err;
 }
 
 /**
- * ext3_splice_branch - splice the allocated branch onto inode.
+ * ext4_splice_branch - splice the allocated branch onto inode.
  * @inode: owner
  * @block: (logical) number of block we are adding
  * @chain: chain of indirect blocks (with a missing link - see
- *	ext3_alloc_branch)
+ *	ext4_alloc_branch)
  * @where: location of missing link
  * @num:   number of indirect blocks we are adding
  * @blks:  number of direct blocks we are adding
@@ -682,15 +682,15 @@ failed:
  * inode (->i_blocks, etc.). In case of success we end up with the full
  * chain to new block and return 0.
  */
-static int ext3_splice_branch(handle_t *handle, struct inode *inode,
+static int ext4_splice_branch(handle_t *handle, struct inode *inode,
 			long block, Indirect *where, int num, int blks)
 {
 	int i;
 	int err = 0;
-	struct ext3_block_alloc_info *block_i;
-	ext3_fsblk_t current_block;
+	struct ext4_block_alloc_info *block_i;
+	ext4_fsblk_t current_block;
 
-	block_i = EXT3_I(inode)->i_block_alloc_info;
+	block_i = EXT4_I(inode)->i_block_alloc_info;
 	/*
 	 * If we're splicing into a [td]indirect block (as opposed to the
 	 * inode) then we need to get write access to the [td]indirect block
@@ -698,7 +698,7 @@ static int ext3_splice_branch(handle_t *handle, struct inode *inode,
 	 */
 	if (where->bh) {
 		BUFFER_TRACE(where->bh, "get_write_access");
-		err = ext3_journal_get_write_access(handle, where->bh);
+		err = ext4_journal_get_write_access(handle, where->bh);
 		if (err)
 			goto err_out;
 	}
@@ -730,7 +730,7 @@ static int ext3_splice_branch(handle_t *handle, struct inode *inode,
 	/* We are done with atomic stuff, now do the rest of housekeeping */
 
 	inode->i_ctime = CURRENT_TIME_SEC;
-	ext3_mark_inode_dirty(handle, inode);
+	ext4_mark_inode_dirty(handle, inode);
 
 	/* had we spliced it onto indirect block? */
 	if (where->bh) {
@@ -740,11 +740,11 @@ static int ext3_splice_branch(handle_t *handle, struct inode *inode,
 		 * onto an indirect block at the very end of the file (the
 		 * file is growing) then we *will* alter the inode to reflect
 		 * the new i_size.  But that is not done here - it is done in
-		 * generic_commit_write->__mark_inode_dirty->ext3_dirty_inode.
+		 * generic_commit_write->__mark_inode_dirty->ext4_dirty_inode.
 		 */
 		jbd_debug(5, "splicing indirect only\n");
-		BUFFER_TRACE(where->bh, "call ext3_journal_dirty_metadata");
-		err = ext3_journal_dirty_metadata(handle, where->bh);
+		BUFFER_TRACE(where->bh, "call ext4_journal_dirty_metadata");
+		err = ext4_journal_dirty_metadata(handle, where->bh);
 		if (err)
 			goto err_out;
 	} else {
@@ -759,10 +759,10 @@ static int ext3_splice_branch(handle_t *handle, struct inode *inode,
 err_out:
 	for (i = 1; i <= num; i++) {
 		BUFFER_TRACE(where[i].bh, "call journal_forget");
-		ext3_journal_forget(handle, where[i].bh);
-		ext3_free_blocks(handle,inode,le32_to_cpu(where[i-1].key),1);
+		ext4_journal_forget(handle, where[i].bh);
+		ext4_free_blocks(handle,inode,le32_to_cpu(where[i-1].key),1);
 	}
-	ext3_free_blocks(handle, inode, le32_to_cpu(where[num].key), blks);
+	ext4_free_blocks(handle, inode, le32_to_cpu(where[num].key), blks);
 
 	return err;
 }
@@ -786,7 +786,7 @@ err_out:
  * return = 0, if plain lookup failed.
  * return < 0, error case.
  */
-int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
+int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
 		sector_t iblock, unsigned long maxblocks,
 		struct buffer_head *bh_result,
 		int create, int extend_disksize)
@@ -795,22 +795,22 @@ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
 	int offsets[4];
 	Indirect chain[4];
 	Indirect *partial;
-	ext3_fsblk_t goal;
+	ext4_fsblk_t goal;
 	int indirect_blks;
 	int blocks_to_boundary = 0;
 	int depth;
-	struct ext3_inode_info *ei = EXT3_I(inode);
+	struct ext4_inode_info *ei = EXT4_I(inode);
 	int count = 0;
-	ext3_fsblk_t first_block = 0;
+	ext4_fsblk_t first_block = 0;
 
 
 	J_ASSERT(handle != NULL || create == 0);
-	depth = ext3_block_to_path(inode,iblock,offsets,&blocks_to_boundary);
+	depth = ext4_block_to_path(inode,iblock,offsets,&blocks_to_boundary);
 
 	if (depth == 0)
 		goto out;
 
-	partial = ext3_get_branch(inode, depth, offsets, chain, &err);
+	partial = ext4_get_branch(inode, depth, offsets, chain, &err);
 
 	/* Simplest case - block found, no allocation needed */
 	if (!partial) {
@@ -819,7 +819,7 @@ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
 		count++;
 		/*map more blocks*/
 		while (count < maxblocks && count <= blocks_to_boundary) {
-			ext3_fsblk_t blk;
+			ext4_fsblk_t blk;
 
 			if (!verify_chain(chain, partial)) {
 				/*
@@ -852,7 +852,7 @@ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
 
 	/*
 	 * If the indirect block is missing while we are reading
-	 * the chain(ext3_get_branch() returns -EAGAIN err), or
+	 * the chain(ext4_get_branch() returns -EAGAIN err), or
 	 * if the chain has been changed after we grab the semaphore,
 	 * (either because another process truncated this branch, or
 	 * another get_block allocated this branch) re-grab the chain to see if
@@ -867,7 +867,7 @@ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
 			brelse(partial->bh);
 			partial--;
 		}
-		partial = ext3_get_branch(inode, depth, offsets, chain, &err);
+		partial = ext4_get_branch(inode, depth, offsets, chain, &err);
 		if (!partial) {
 			count++;
 			mutex_unlock(&ei->truncate_mutex);
@@ -883,9 +883,9 @@ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
 	 * allocation info here if necessary
 	*/
 	if (S_ISREG(inode->i_mode) && (!ei->i_block_alloc_info))
-		ext3_init_block_alloc_info(inode);
+		ext4_init_block_alloc_info(inode);
 
-	goal = ext3_find_goal(inode, iblock, chain, partial);
+	goal = ext4_find_goal(inode, iblock, chain, partial);
 
 	/* the number of blocks need to allocate for [d,t]indirect blocks */
 	indirect_blks = (chain + depth) - partial - 1;
@@ -894,28 +894,28 @@ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
 	 * Next look up the indirect map to count the totoal number of
 	 * direct blocks to allocate for this branch.
 	 */
-	count = ext3_blks_to_allocate(partial, indirect_blks,
+	count = ext4_blks_to_allocate(partial, indirect_blks,
 					maxblocks, blocks_to_boundary);
 	/*
-	 * Block out ext3_truncate while we alter the tree
+	 * Block out ext4_truncate while we alter the tree
 	 */
-	err = ext3_alloc_branch(handle, inode, indirect_blks, &count, goal,
+	err = ext4_alloc_branch(handle, inode, indirect_blks, &count, goal,
 				offsets + (partial - chain), partial);
 
 	/*
-	 * The ext3_splice_branch call will free and forget any buffers
+	 * The ext4_splice_branch call will free and forget any buffers
 	 * on the new chain if there is a failure, but that risks using
 	 * up transaction credits, especially for bitmaps where the
 	 * credits cannot be returned.  Can we handle this somehow?  We
 	 * may need to return -EAGAIN upwards in the worst case.  --sct
 	 */
 	if (!err)
-		err = ext3_splice_branch(handle, inode, iblock,
+		err = ext4_splice_branch(handle, inode, iblock,
 					partial, indirect_blks, count);
 	/*
 	 * i_disksize growing is protected by truncate_mutex.  Don't forget to
 	 * protect it if you're about to implement concurrent
-	 * ext3_get_block() -bzzz
+	 * ext4_get_block() -bzzz
 	*/
 	if (!err && extend_disksize && inode->i_size > ei->i_disksize)
 		ei->i_disksize = inode->i_size;
@@ -942,9 +942,9 @@ out:
 	return err;
 }
 
-#define DIO_CREDITS (EXT3_RESERVE_TRANS_BLOCKS + 32)
+#define DIO_CREDITS (EXT4_RESERVE_TRANS_BLOCKS + 32)
 
-static int ext3_get_block(struct inode *inode, sector_t iblock,
+static int ext4_get_block(struct inode *inode, sector_t iblock,
 			struct buffer_head *bh_result, int create)
 {
 	handle_t *handle = journal_current_handle();
@@ -962,29 +962,29 @@ static int ext3_get_block(struct inode *inode, sector_t iblock,
 		 * Huge direct-io writes can hold off commits for long
 		 * periods of time.  Let this commit run.
 		 */
-		ext3_journal_stop(handle);
-		handle = ext3_journal_start(inode, DIO_CREDITS);
+		ext4_journal_stop(handle);
+		handle = ext4_journal_start(inode, DIO_CREDITS);
 		if (IS_ERR(handle))
 			ret = PTR_ERR(handle);
 		goto get_block;
 	}
 
-	if (handle->h_buffer_credits <= EXT3_RESERVE_TRANS_BLOCKS) {
+	if (handle->h_buffer_credits <= EXT4_RESERVE_TRANS_BLOCKS) {
 		/*
 		 * Getting low on buffer credits...
 		 */
-		ret = ext3_journal_extend(handle, DIO_CREDITS);
+		ret = ext4_journal_extend(handle, DIO_CREDITS);
 		if (ret > 0) {
 			/*
 			 * Couldn't extend the transaction.  Start a new one.
 			 */
-			ret = ext3_journal_restart(handle, DIO_CREDITS);
+			ret = ext4_journal_restart(handle, DIO_CREDITS);
 		}
 	}
 
 get_block:
 	if (ret == 0) {
-		ret = ext3_get_blocks_handle(handle, inode, iblock,
+		ret = ext4_get_blocks_handle(handle, inode, iblock,
 					max_blocks, bh_result, create, 0);
 		if (ret > 0) {
 			bh_result->b_size = (ret << inode->i_blkbits);
@@ -997,7 +997,7 @@ get_block:
 /*
  * `handle' can be NULL if create is zero
  */
-struct buffer_head *ext3_getblk(handle_t *handle, struct inode *inode,
+struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode,
 				long block, int create, int *errp)
 {
 	struct buffer_head dummy;
@@ -1008,10 +1008,10 @@ struct buffer_head *ext3_getblk(handle_t *handle, struct inode *inode,
 	dummy.b_state = 0;
 	dummy.b_blocknr = -1000;
 	buffer_trace_init(&dummy.b_history);
-	err = ext3_get_blocks_handle(handle, inode, block, 1,
+	err = ext4_get_blocks_handle(handle, inode, block, 1,
 					&dummy, create, 1);
 	/*
-	 * ext3_get_blocks_handle() returns number of blocks
+	 * ext4_get_blocks_handle() returns number of blocks
 	 * mapped. 0 in case of a HOLE.
 	 */
 	if (err > 0) {
@@ -1035,19 +1035,19 @@ struct buffer_head *ext3_getblk(handle_t *handle, struct inode *inode,
 			 * Now that we do not always journal data, we should
 			 * keep in mind whether this should always journal the
 			 * new buffer as metadata.  For now, regular file
-			 * writes use ext3_get_block instead, so it's not a
+			 * writes use ext4_get_block instead, so it's not a
 			 * problem.
 			 */
 			lock_buffer(bh);
 			BUFFER_TRACE(bh, "call get_create_access");
-			fatal = ext3_journal_get_create_access(handle, bh);
+			fatal = ext4_journal_get_create_access(handle, bh);
 			if (!fatal && !buffer_uptodate(bh)) {
 				memset(bh->b_data,0,inode->i_sb->s_blocksize);
 				set_buffer_uptodate(bh);
 			}
 			unlock_buffer(bh);
-			BUFFER_TRACE(bh, "call ext3_journal_dirty_metadata");
-			err = ext3_journal_dirty_metadata(handle, bh);
+			BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata");
+			err = ext4_journal_dirty_metadata(handle, bh);
 			if (!fatal)
 				fatal = err;
 		} else {
@@ -1064,12 +1064,12 @@ err:
 	return NULL;
 }
 
-struct buffer_head *ext3_bread(handle_t *handle, struct inode *inode,
+struct buffer_head *ext4_bread(handle_t *handle, struct inode *inode,
 			       int block, int create, int *err)
 {
 	struct buffer_head * bh;
 
-	bh = ext3_getblk(handle, inode, block, create, err);
+	bh = ext4_getblk(handle, inode, block, create, err);
 	if (!bh)
 		return bh;
 	if (buffer_uptodate(bh))
@@ -1118,17 +1118,17 @@ static int walk_page_buffers(	handle_t *handle,
 /*
  * To preserve ordering, it is essential that the hole instantiation and
  * the data write be encapsulated in a single transaction.  We cannot
- * close off a transaction and start a new one between the ext3_get_block()
+ * close off a transaction and start a new one between the ext4_get_block()
  * and the commit_write().  So doing the journal_start at the start of
  * prepare_write() is the right place.
  *
- * Also, this function can nest inside ext3_writepage() ->
- * block_write_full_page(). In that case, we *know* that ext3_writepage()
+ * Also, this function can nest inside ext4_writepage() ->
+ * block_write_full_page(). In that case, we *know* that ext4_writepage()
  * has generated enough buffer credits to do the whole page.  So we won't
  * block on the journal in that case, which is good, because the caller may
  * be PF_MEMALLOC.
  *
- * By accident, ext3 can be reentered when a transaction is open via
+ * By accident, ext4 can be reentered when a transaction is open via
  * quota file writes.  If we were to commit the transaction while thus
  * reentered, there can be a deadlock - we would be holding a quota
  * lock, and the commit would never complete if another thread had a
@@ -1145,48 +1145,48 @@ static int do_journal_get_write_access(handle_t *handle,
 {
 	if (!buffer_mapped(bh) || buffer_freed(bh))
 		return 0;
-	return ext3_journal_get_write_access(handle, bh);
+	return ext4_journal_get_write_access(handle, bh);
 }
 
-static int ext3_prepare_write(struct file *file, struct page *page,
+static int ext4_prepare_write(struct file *file, struct page *page,
 			      unsigned from, unsigned to)
 {
 	struct inode *inode = page->mapping->host;
-	int ret, needed_blocks = ext3_writepage_trans_blocks(inode);
+	int ret, needed_blocks = ext4_writepage_trans_blocks(inode);
 	handle_t *handle;
 	int retries = 0;
 
 retry:
-	handle = ext3_journal_start(inode, needed_blocks);
+	handle = ext4_journal_start(inode, needed_blocks);
 	if (IS_ERR(handle)) {
 		ret = PTR_ERR(handle);
 		goto out;
 	}
-	if (test_opt(inode->i_sb, NOBH) && ext3_should_writeback_data(inode))
-		ret = nobh_prepare_write(page, from, to, ext3_get_block);
+	if (test_opt(inode->i_sb, NOBH) && ext4_should_writeback_data(inode))
+		ret = nobh_prepare_write(page, from, to, ext4_get_block);
 	else
-		ret = block_prepare_write(page, from, to, ext3_get_block);
+		ret = block_prepare_write(page, from, to, ext4_get_block);
 	if (ret)
 		goto prepare_write_failed;
 
-	if (ext3_should_journal_data(inode)) {
+	if (ext4_should_journal_data(inode)) {
 		ret = walk_page_buffers(handle, page_buffers(page),
 				from, to, NULL, do_journal_get_write_access);
 	}
 prepare_write_failed:
 	if (ret)
-		ext3_journal_stop(handle);
-	if (ret == -ENOSPC && ext3_should_retry_alloc(inode->i_sb, &retries))
+		ext4_journal_stop(handle);
+	if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
 		goto retry;
 out:
 	return ret;
 }
 
-int ext3_journal_dirty_data(handle_t *handle, struct buffer_head *bh)
+int ext4_journal_dirty_data(handle_t *handle, struct buffer_head *bh)
 {
 	int err = journal_dirty_data(handle, bh);
 	if (err)
-		ext3_journal_abort_handle(__FUNCTION__, __FUNCTION__,
+		ext4_journal_abort_handle(__FUNCTION__, __FUNCTION__,
 						bh, handle,err);
 	return err;
 }
@@ -1197,25 +1197,25 @@ static int commit_write_fn(handle_t *handle, struct buffer_head *bh)
 	if (!buffer_mapped(bh) || buffer_freed(bh))
 		return 0;
 	set_buffer_uptodate(bh);
-	return ext3_journal_dirty_metadata(handle, bh);
+	return ext4_journal_dirty_metadata(handle, bh);
 }
 
 /*
  * We need to pick up the new inode size which generic_commit_write gave us
  * `file' can be NULL - eg, when called from page_symlink().
  *
- * ext3 never places buffers on inode->i_mapping->private_list.  metadata
+ * ext4 never places buffers on inode->i_mapping->private_list.  metadata
  * buffers are managed internally.
  */
-static int ext3_ordered_commit_write(struct file *file, struct page *page,
+static int ext4_ordered_commit_write(struct file *file, struct page *page,
 			     unsigned from, unsigned to)
 {
-	handle_t *handle = ext3_journal_current_handle();
+	handle_t *handle = ext4_journal_current_handle();
 	struct inode *inode = page->mapping->host;
 	int ret = 0, ret2;
 
 	ret = walk_page_buffers(handle, page_buffers(page),
-		from, to, NULL, ext3_journal_dirty_data);
+		from, to, NULL, ext4_journal_dirty_data);
 
 	if (ret == 0) {
 		/*
@@ -1226,43 +1226,43 @@ static int ext3_ordered_commit_write(struct file *file, struct page *page,
 		loff_t new_i_size;
 
 		new_i_size = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
-		if (new_i_size > EXT3_I(inode)->i_disksize)
-			EXT3_I(inode)->i_disksize = new_i_size;
+		if (new_i_size > EXT4_I(inode)->i_disksize)
+			EXT4_I(inode)->i_disksize = new_i_size;
 		ret = generic_commit_write(file, page, from, to);
 	}
-	ret2 = ext3_journal_stop(handle);
+	ret2 = ext4_journal_stop(handle);
 	if (!ret)
 		ret = ret2;
 	return ret;
 }
 
-static int ext3_writeback_commit_write(struct file *file, struct page *page,
+static int ext4_writeback_commit_write(struct file *file, struct page *page,
 			     unsigned from, unsigned to)
 {
-	handle_t *handle = ext3_journal_current_handle();
+	handle_t *handle = ext4_journal_current_handle();
 	struct inode *inode = page->mapping->host;
 	int ret = 0, ret2;
 	loff_t new_i_size;
 
 	new_i_size = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
-	if (new_i_size > EXT3_I(inode)->i_disksize)
-		EXT3_I(inode)->i_disksize = new_i_size;
+	if (new_i_size > EXT4_I(inode)->i_disksize)
+		EXT4_I(inode)->i_disksize = new_i_size;
 
-	if (test_opt(inode->i_sb, NOBH) && ext3_should_writeback_data(inode))
+	if (test_opt(inode->i_sb, NOBH) && ext4_should_writeback_data(inode))
 		ret = nobh_commit_write(file, page, from, to);
 	else
 		ret = generic_commit_write(file, page, from, to);
 
-	ret2 = ext3_journal_stop(handle);
+	ret2 = ext4_journal_stop(handle);
 	if (!ret)
 		ret = ret2;
 	return ret;
 }
 
-static int ext3_journalled_commit_write(struct file *file,
+static int ext4_journalled_commit_write(struct file *file,
 			struct page *page, unsigned from, unsigned to)
 {
-	handle_t *handle = ext3_journal_current_handle();
+	handle_t *handle = ext4_journal_current_handle();
 	struct inode *inode = page->mapping->host;
 	int ret = 0, ret2;
 	int partial = 0;
@@ -1279,14 +1279,14 @@ static int ext3_journalled_commit_write(struct file *file,
 		SetPageUptodate(page);
 	if (pos > inode->i_size)
 		i_size_write(inode, pos);
-	EXT3_I(inode)->i_state |= EXT3_STATE_JDATA;
-	if (inode->i_size > EXT3_I(inode)->i_disksize) {
-		EXT3_I(inode)->i_disksize = inode->i_size;
-		ret2 = ext3_mark_inode_dirty(handle, inode);
+	EXT4_I(inode)->i_state |= EXT4_STATE_JDATA;
+	if (inode->i_size > EXT4_I(inode)->i_disksize) {
+		EXT4_I(inode)->i_disksize = inode->i_size;
+		ret2 = ext4_mark_inode_dirty(handle, inode);
 		if (!ret)
 			ret = ret2;
 	}
-	ret2 = ext3_journal_stop(handle);
+	ret2 = ext4_journal_stop(handle);
 	if (!ret)
 		ret = ret2;
 	return ret;
@@ -1297,7 +1297,7 @@ static int ext3_journalled_commit_write(struct file *file,
  * the swapper to find the on-disk block of a specific piece of data.
  *
  * Naturally, this is dangerous if the block concerned is still in the
- * journal.  If somebody makes a swapfile on an ext3 data-journaling
+ * journal.  If somebody makes a swapfile on an ext4 data-journaling
  * filesystem and enables swap, then they may get a nasty shock when the
  * data getting swapped to that swapfile suddenly gets overwritten by
  * the original zero's written out previously to the journal and
@@ -1306,13 +1306,13 @@ static int ext3_journalled_commit_write(struct file *file,
  * So, if we see any bmap calls here on a modified, data-journaled file,
  * take extra steps to flush any blocks which might be in the cache.
  */
-static sector_t ext3_bmap(struct address_space *mapping, sector_t block)
+static sector_t ext4_bmap(struct address_space *mapping, sector_t block)
 {
 	struct inode *inode = mapping->host;
 	journal_t *journal;
 	int err;
 
-	if (EXT3_I(inode)->i_state & EXT3_STATE_JDATA) {
+	if (EXT4_I(inode)->i_state & EXT4_STATE_JDATA) {
 		/*
 		 * This is a REALLY heavyweight approach, but the use of
 		 * bmap on dirty files is expected to be extremely rare:
@@ -1324,15 +1324,15 @@ static sector_t ext3_bmap(struct address_space *mapping, sector_t block)
 		 * in trouble if mortal users could trigger this path at
 		 * will.)
 		 *
-		 * NB. EXT3_STATE_JDATA is not set on files other than
+		 * NB. EXT4_STATE_JDATA is not set on files other than
 		 * regular files.  If somebody wants to bmap a directory
 		 * or symlink and gets confused because the buffer
 		 * hasn't yet been flushed to disk, they deserve
 		 * everything they get.
 		 */
 
-		EXT3_I(inode)->i_state &= ~EXT3_STATE_JDATA;
-		journal = EXT3_JOURNAL(inode);
+		EXT4_I(inode)->i_state &= ~EXT4_STATE_JDATA;
+		journal = EXT4_JOURNAL(inode);
 		journal_lock_updates(journal);
 		err = journal_flush(journal);
 		journal_unlock_updates(journal);
@@ -1341,7 +1341,7 @@ static sector_t ext3_bmap(struct address_space *mapping, sector_t block)
 			return 0;
 	}
 
-	return generic_block_bmap(mapping,block,ext3_get_block);
+	return generic_block_bmap(mapping,block,ext4_get_block);
 }
 
 static int bget_one(handle_t *handle, struct buffer_head *bh)
@@ -1359,14 +1359,14 @@ static int bput_one(handle_t *handle, struct buffer_head *bh)
 static int journal_dirty_data_fn(handle_t *handle, struct buffer_head *bh)
 {
 	if (buffer_mapped(bh))
-		return ext3_journal_dirty_data(handle, bh);
+		return ext4_journal_dirty_data(handle, bh);
 	return 0;
 }
 
 /*
  * Note that we always start a transaction even if we're not journalling
  * data.  This is to preserve ordering: any hole instantiation within
- * __block_write_full_page -> ext3_get_block() should be journalled
+ * __block_write_full_page -> ext4_get_block() should be journalled
  * along with the data so we don't crash and then get metadata which
  * refers to old data.
  *
@@ -1374,14 +1374,14 @@ static int journal_dirty_data_fn(handle_t *handle, struct buffer_head *bh)
  *
  * Problem:
  *
- *	ext3_writepage() -> kmalloc() -> __alloc_pages() -> page_launder() ->
- *		ext3_writepage()
+ *	ext4_writepage() -> kmalloc() -> __alloc_pages() -> page_launder() ->
+ *		ext4_writepage()
  *
  * Similar for:
  *
- *	ext3_file_write() -> generic_file_write() -> __alloc_pages() -> ...
+ *	ext4_file_write() -> generic_file_write() -> __alloc_pages() -> ...
  *
- * Same applies to ext3_get_block().  We will deadlock on various things like
+ * Same applies to ext4_get_block().  We will deadlock on various things like
  * lock_journal and i_truncate_mutex.
  *
  * Setting PF_MEMALLOC here doesn't work - too many internal memory
@@ -1415,7 +1415,7 @@ static int journal_dirty_data_fn(handle_t *handle, struct buffer_head *bh)
  * AKPM2: if all the page's buffers are mapped to disk and !data=journal,
  * we don't need to open a transaction here.
  */
-static int ext3_ordered_writepage(struct page *page,
+static int ext4_ordered_writepage(struct page *page,
 				struct writeback_control *wbc)
 {
 	struct inode *inode = page->mapping->host;
@@ -1430,10 +1430,10 @@ static int ext3_ordered_writepage(struct page *page,
 	 * We give up here if we're reentered, because it might be for a
 	 * different filesystem.
 	 */
-	if (ext3_journal_current_handle())
+	if (ext4_journal_current_handle())
 		goto out_fail;
 
-	handle = ext3_journal_start(inode, ext3_writepage_trans_blocks(inode));
+	handle = ext4_journal_start(inode, ext4_writepage_trans_blocks(inode));
 
 	if (IS_ERR(handle)) {
 		ret = PTR_ERR(handle);
@@ -1448,7 +1448,7 @@ static int ext3_ordered_writepage(struct page *page,
 	walk_page_buffers(handle, page_bufs, 0,
 			PAGE_CACHE_SIZE, NULL, bget_one);
 
-	ret = block_write_full_page(page, ext3_get_block, wbc);
+	ret = block_write_full_page(page, ext4_get_block, wbc);
 
 	/*
 	 * The page can become unlocked at any point now, and
@@ -1470,7 +1470,7 @@ static int ext3_ordered_writepage(struct page *page,
 	}
 	walk_page_buffers(handle, page_bufs, 0,
 			PAGE_CACHE_SIZE, NULL, bput_one);
-	err = ext3_journal_stop(handle);
+	err = ext4_journal_stop(handle);
 	if (!ret)
 		ret = err;
 	return ret;
@@ -1481,7 +1481,7 @@ out_fail:
 	return ret;
 }
 
-static int ext3_writeback_writepage(struct page *page,
+static int ext4_writeback_writepage(struct page *page,
 				struct writeback_control *wbc)
 {
 	struct inode *inode = page->mapping->host;
@@ -1489,21 +1489,21 @@ static int ext3_writeback_writepage(struct page *page,
 	int ret = 0;
 	int err;
 
-	if (ext3_journal_current_handle())
+	if (ext4_journal_current_handle())
 		goto out_fail;
 
-	handle = ext3_journal_start(inode, ext3_writepage_trans_blocks(inode));
+	handle = ext4_journal_start(inode, ext4_writepage_trans_blocks(inode));
 	if (IS_ERR(handle)) {
 		ret = PTR_ERR(handle);
 		goto out_fail;
 	}
 
-	if (test_opt(inode->i_sb, NOBH) && ext3_should_writeback_data(inode))
-		ret = nobh_writepage(page, ext3_get_block, wbc);
+	if (test_opt(inode->i_sb, NOBH) && ext4_should_writeback_data(inode))
+		ret = nobh_writepage(page, ext4_get_block, wbc);
 	else
-		ret = block_write_full_page(page, ext3_get_block, wbc);
+		ret = block_write_full_page(page, ext4_get_block, wbc);
 
-	err = ext3_journal_stop(handle);
+	err = ext4_journal_stop(handle);
 	if (!ret)
 		ret = err;
 	return ret;
@@ -1514,7 +1514,7 @@ out_fail:
 	return ret;
 }
 
-static int ext3_journalled_writepage(struct page *page,
+static int ext4_journalled_writepage(struct page *page,
 				struct writeback_control *wbc)
 {
 	struct inode *inode = page->mapping->host;
@@ -1522,10 +1522,10 @@ static int ext3_journalled_writepage(struct page *page,
 	int ret = 0;
 	int err;
 
-	if (ext3_journal_current_handle())
+	if (ext4_journal_current_handle())
 		goto no_write;
 
-	handle = ext3_journal_start(inode, ext3_writepage_trans_blocks(inode));
+	handle = ext4_journal_start(inode, ext4_writepage_trans_blocks(inode));
 	if (IS_ERR(handle)) {
 		ret = PTR_ERR(handle);
 		goto no_write;
@@ -1538,9 +1538,9 @@ static int ext3_journalled_writepage(struct page *page,
 		 */
 		ClearPageChecked(page);
 		ret = block_prepare_write(page, 0, PAGE_CACHE_SIZE,
-					ext3_get_block);
+					ext4_get_block);
 		if (ret != 0) {
-			ext3_journal_stop(handle);
+			ext4_journal_stop(handle);
 			goto out_unlock;
 		}
 		ret = walk_page_buffers(handle, page_buffers(page), 0,
@@ -1550,7 +1550,7 @@ static int ext3_journalled_writepage(struct page *page,
 				PAGE_CACHE_SIZE, NULL, commit_write_fn);
 		if (ret == 0)
 			ret = err;
-		EXT3_I(inode)->i_state |= EXT3_STATE_JDATA;
+		EXT4_I(inode)->i_state |= EXT4_STATE_JDATA;
 		unlock_page(page);
 	} else {
 		/*
@@ -1558,9 +1558,9 @@ static int ext3_journalled_writepage(struct page *page,
 		 * really know unless we go poke around in the buffer_heads.
 		 * But block_write_full_page will do the right thing.
 		 */
-		ret = block_write_full_page(page, ext3_get_block, wbc);
+		ret = block_write_full_page(page, ext4_get_block, wbc);
 	}
-	err = ext3_journal_stop(handle);
+	err = ext4_journal_stop(handle);
 	if (!ret)
 		ret = err;
 out:
@@ -1573,21 +1573,21 @@ out_unlock:
 	goto out;
 }
 
-static int ext3_readpage(struct file *file, struct page *page)
+static int ext4_readpage(struct file *file, struct page *page)
 {
-	return mpage_readpage(page, ext3_get_block);
+	return mpage_readpage(page, ext4_get_block);
 }
 
 static int
-ext3_readpages(struct file *file, struct address_space *mapping,
+ext4_readpages(struct file *file, struct address_space *mapping,
 		struct list_head *pages, unsigned nr_pages)
 {
-	return mpage_readpages(mapping, pages, nr_pages, ext3_get_block);
+	return mpage_readpages(mapping, pages, nr_pages, ext4_get_block);
 }
 
-static void ext3_invalidatepage(struct page *page, unsigned long offset)
+static void ext4_invalidatepage(struct page *page, unsigned long offset)
 {
-	journal_t *journal = EXT3_JOURNAL(page->mapping->host);
+	journal_t *journal = EXT4_JOURNAL(page->mapping->host);
 
 	/*
 	 * If it's a full truncate we just forget about the pending dirtying
@@ -1598,9 +1598,9 @@ static void ext3_invalidatepage(struct page *page, unsigned long offset)
 	journal_invalidatepage(journal, page, offset);
 }
 
-static int ext3_releasepage(struct page *page, gfp_t wait)
+static int ext4_releasepage(struct page *page, gfp_t wait)
 {
-	journal_t *journal = EXT3_JOURNAL(page->mapping->host);
+	journal_t *journal = EXT4_JOURNAL(page->mapping->host);
 
 	WARN_ON(PageChecked(page));
 	if (!page_has_buffers(page))
@@ -1616,13 +1616,13 @@ static int ext3_releasepage(struct page *page, gfp_t wait)
  * If the O_DIRECT write is intantiating holes inside i_size and the machine
  * crashes then stale disk data _may_ be exposed inside the file.
  */
-static ssize_t ext3_direct_IO(int rw, struct kiocb *iocb,
+static ssize_t ext4_direct_IO(int rw, struct kiocb *iocb,
 			const struct iovec *iov, loff_t offset,
 			unsigned long nr_segs)
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file->f_mapping->host;
-	struct ext3_inode_info *ei = EXT3_I(inode);
+	struct ext4_inode_info *ei = EXT4_I(inode);
 	handle_t *handle = NULL;
 	ssize_t ret;
 	int orphan = 0;
@@ -1631,13 +1631,13 @@ static ssize_t ext3_direct_IO(int rw, struct kiocb *iocb,
 	if (rw == WRITE) {
 		loff_t final_size = offset + count;
 
-		handle = ext3_journal_start(inode, DIO_CREDITS);
+		handle = ext4_journal_start(inode, DIO_CREDITS);
 		if (IS_ERR(handle)) {
 			ret = PTR_ERR(handle);
 			goto out;
 		}
 		if (final_size > inode->i_size) {
-			ret = ext3_orphan_add(handle, inode);
+			ret = ext4_orphan_add(handle, inode);
 			if (ret)
 				goto out_stop;
 			orphan = 1;
@@ -1647,10 +1647,10 @@ static ssize_t ext3_direct_IO(int rw, struct kiocb *iocb,
 
 	ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
 				 offset, nr_segs,
-				 ext3_get_block, NULL);
+				 ext4_get_block, NULL);
 
 	/*
-	 * Reacquire the handle: ext3_get_block() can restart the transaction
+	 * Reacquire the handle: ext4_get_block() can restart the transaction
 	 */
 	handle = journal_current_handle();
 
@@ -1659,7 +1659,7 @@ out_stop:
 		int err;
 
 		if (orphan && inode->i_nlink)
-			ext3_orphan_del(handle, inode);
+			ext4_orphan_del(handle, inode);
 		if (orphan && ret > 0) {
 			loff_t end = offset + ret;
 			if (end > inode->i_size) {
@@ -1669,13 +1669,13 @@ out_stop:
 				 * We're going to return a positive `ret'
 				 * here due to non-zero-length I/O, so there's
 				 * no way of reporting error returns from
-				 * ext3_mark_inode_dirty() to userspace.  So
+				 * ext4_mark_inode_dirty() to userspace.  So
 				 * ignore it.
 				 */
-				ext3_mark_inode_dirty(handle, inode);
+				ext4_mark_inode_dirty(handle, inode);
 			}
 		}
-		err = ext3_journal_stop(handle);
+		err = ext4_journal_stop(handle);
 		if (ret == 0)
 			ret = err;
 	}
@@ -1684,7 +1684,7 @@ out:
 }
 
 /*
- * Pages can be marked dirty completely asynchronously from ext3's journalling
+ * Pages can be marked dirty completely asynchronously from ext4's journalling
  * activity.  By filemap_sync_pte(), try_to_unmap_one(), etc.  We cannot do
  * much here because ->set_page_dirty is called under VFS locks.  The page is
  * not necessarily locked.
@@ -1696,73 +1696,73 @@ out:
  * So what we do is to mark the page "pending dirty" and next time writepage
  * is called, propagate that into the buffers appropriately.
  */
-static int ext3_journalled_set_page_dirty(struct page *page)
+static int ext4_journalled_set_page_dirty(struct page *page)
 {
 	SetPageChecked(page);
 	return __set_page_dirty_nobuffers(page);
 }
 
-static const struct address_space_operations ext3_ordered_aops = {
-	.readpage	= ext3_readpage,
-	.readpages	= ext3_readpages,
-	.writepage	= ext3_ordered_writepage,
+static const struct address_space_operations ext4_ordered_aops = {
+	.readpage	= ext4_readpage,
+	.readpages	= ext4_readpages,
+	.writepage	= ext4_ordered_writepage,
 	.sync_page	= block_sync_page,
-	.prepare_write	= ext3_prepare_write,
-	.commit_write	= ext3_ordered_commit_write,
-	.bmap		= ext3_bmap,
-	.invalidatepage	= ext3_invalidatepage,
-	.releasepage	= ext3_releasepage,
-	.direct_IO	= ext3_direct_IO,
+	.prepare_write	= ext4_prepare_write,
+	.commit_write	= ext4_ordered_commit_write,
+	.bmap		= ext4_bmap,
+	.invalidatepage	= ext4_invalidatepage,
+	.releasepage	= ext4_releasepage,
+	.direct_IO	= ext4_direct_IO,
 	.migratepage	= buffer_migrate_page,
 };
 
-static const struct address_space_operations ext3_writeback_aops = {
-	.readpage	= ext3_readpage,
-	.readpages	= ext3_readpages,
-	.writepage	= ext3_writeback_writepage,
+static const struct address_space_operations ext4_writeback_aops = {
+	.readpage	= ext4_readpage,
+	.readpages	= ext4_readpages,
+	.writepage	= ext4_writeback_writepage,
 	.sync_page	= block_sync_page,
-	.prepare_write	= ext3_prepare_write,
-	.commit_write	= ext3_writeback_commit_write,
-	.bmap		= ext3_bmap,
-	.invalidatepage	= ext3_invalidatepage,
-	.releasepage	= ext3_releasepage,
-	.direct_IO	= ext3_direct_IO,
+	.prepare_write	= ext4_prepare_write,
+	.commit_write	= ext4_writeback_commit_write,
+	.bmap		= ext4_bmap,
+	.invalidatepage	= ext4_invalidatepage,
+	.releasepage	= ext4_releasepage,
+	.direct_IO	= ext4_direct_IO,
 	.migratepage	= buffer_migrate_page,
 };
 
-static const struct address_space_operations ext3_journalled_aops = {
-	.readpage	= ext3_readpage,
-	.readpages	= ext3_readpages,
-	.writepage	= ext3_journalled_writepage,
+static const struct address_space_operations ext4_journalled_aops = {
+	.readpage	= ext4_readpage,
+	.readpages	= ext4_readpages,
+	.writepage	= ext4_journalled_writepage,
 	.sync_page	= block_sync_page,
-	.prepare_write	= ext3_prepare_write,
-	.commit_write	= ext3_journalled_commit_write,
-	.set_page_dirty	= ext3_journalled_set_page_dirty,
-	.bmap		= ext3_bmap,
-	.invalidatepage	= ext3_invalidatepage,
-	.releasepage	= ext3_releasepage,
+	.prepare_write	= ext4_prepare_write,
+	.commit_write	= ext4_journalled_commit_write,
+	.set_page_dirty	= ext4_journalled_set_page_dirty,
+	.bmap		= ext4_bmap,
+	.invalidatepage	= ext4_invalidatepage,
+	.releasepage	= ext4_releasepage,
 };
 
-void ext3_set_aops(struct inode *inode)
+void ext4_set_aops(struct inode *inode)
 {
-	if (ext3_should_order_data(inode))
-		inode->i_mapping->a_ops = &ext3_ordered_aops;
-	else if (ext3_should_writeback_data(inode))
-		inode->i_mapping->a_ops = &ext3_writeback_aops;
+	if (ext4_should_order_data(inode))
+		inode->i_mapping->a_ops = &ext4_ordered_aops;
+	else if (ext4_should_writeback_data(inode))
+		inode->i_mapping->a_ops = &ext4_writeback_aops;
 	else
-		inode->i_mapping->a_ops = &ext3_journalled_aops;
+		inode->i_mapping->a_ops = &ext4_journalled_aops;
 }
 
 /*
- * ext3_block_truncate_page() zeroes out a mapping from file offset `from'
+ * ext4_block_truncate_page() zeroes out a mapping from file offset `from'
  * up to the end of the block which corresponds to `from'.
  * This required during truncate. We need to physically zero the tail end
  * of that block so it doesn't yield old data if the file is later grown.
  */
-static int ext3_block_truncate_page(handle_t *handle, struct page *page,
+static int ext4_block_truncate_page(handle_t *handle, struct page *page,
 		struct address_space *mapping, loff_t from)
 {
-	ext3_fsblk_t index = from >> PAGE_CACHE_SHIFT;
+	ext4_fsblk_t index = from >> PAGE_CACHE_SHIFT;
 	unsigned offset = from & (PAGE_CACHE_SIZE-1);
 	unsigned blocksize, iblock, length, pos;
 	struct inode *inode = mapping->host;
@@ -1779,7 +1779,7 @@ static int ext3_block_truncate_page(handle_t *handle, struct page *page,
 	 * read-in the page - otherwise we create buffers to do the IO.
 	 */
 	if (!page_has_buffers(page) && test_opt(inode->i_sb, NOBH) &&
-	     ext3_should_writeback_data(inode) && PageUptodate(page)) {
+	     ext4_should_writeback_data(inode) && PageUptodate(page)) {
 		kaddr = kmap_atomic(page, KM_USER0);
 		memset(kaddr + offset, 0, length);
 		flush_dcache_page(page);
@@ -1808,7 +1808,7 @@ static int ext3_block_truncate_page(handle_t *handle, struct page *page,
 
 	if (!buffer_mapped(bh)) {
 		BUFFER_TRACE(bh, "unmapped");
-		ext3_get_block(inode, iblock, bh, 0);
+		ext4_get_block(inode, iblock, bh, 0);
 		/* unmapped? It's a hole - nothing to do */
 		if (!buffer_mapped(bh)) {
 			BUFFER_TRACE(bh, "still unmapped");
@@ -1829,9 +1829,9 @@ static int ext3_block_truncate_page(handle_t *handle, struct page *page,
 			goto unlock;
 	}
 
-	if (ext3_should_journal_data(inode)) {
+	if (ext4_should_journal_data(inode)) {
 		BUFFER_TRACE(bh, "get write access");
-		err = ext3_journal_get_write_access(handle, bh);
+		err = ext4_journal_get_write_access(handle, bh);
 		if (err)
 			goto unlock;
 	}
@@ -1844,11 +1844,11 @@ static int ext3_block_truncate_page(handle_t *handle, struct page *page,
 	BUFFER_TRACE(bh, "zeroed end of block");
 
 	err = 0;
-	if (ext3_should_journal_data(inode)) {
-		err = ext3_journal_dirty_metadata(handle, bh);
+	if (ext4_should_journal_data(inode)) {
+		err = ext4_journal_dirty_metadata(handle, bh);
 	} else {
-		if (ext3_should_order_data(inode))
-			err = ext3_journal_dirty_data(handle, bh);
+		if (ext4_should_order_data(inode))
+			err = ext4_journal_dirty_data(handle, bh);
 		mark_buffer_dirty(bh);
 	}
 
@@ -1872,14 +1872,14 @@ static inline int all_zeroes(__le32 *p, __le32 *q)
 }
 
 /**
- *	ext3_find_shared - find the indirect blocks for partial truncation.
+ *	ext4_find_shared - find the indirect blocks for partial truncation.
  *	@inode:	  inode in question
  *	@depth:	  depth of the affected branch
- *	@offsets: offsets of pointers in that branch (see ext3_block_to_path)
+ *	@offsets: offsets of pointers in that branch (see ext4_block_to_path)
  *	@chain:	  place to store the pointers to partial indirect blocks
  *	@top:	  place to the (detached) top of branch
  *
- *	This is a helper function used by ext3_truncate().
+ *	This is a helper function used by ext4_truncate().
  *
  *	When we do truncate() we may have to clean the ends of several
  *	indirect blocks but leave the blocks themselves alive. Block is
@@ -1887,7 +1887,7 @@ static inline int all_zeroes(__le32 *p, __le32 *q)
  *	from it (and it is on the path to the first completely truncated
  *	data block, indeed).  We have to free the top of that path along
  *	with everything to the right of the path. Since no allocation
- *	past the truncation point is possible until ext3_truncate()
+ *	past the truncation point is possible until ext4_truncate()
  *	finishes, we may safely do the latter, but top of branch may
  *	require special attention - pageout below the truncation point
  *	might try to populate it.
@@ -1906,7 +1906,7 @@ static inline int all_zeroes(__le32 *p, __le32 *q)
  *		c) free the subtrees growing from the inode past the @chain[0].
  *			(no partially truncated stuff there).  */
 
-static Indirect *ext3_find_shared(struct inode *inode, int depth,
+static Indirect *ext4_find_shared(struct inode *inode, int depth,
 			int offsets[4], Indirect chain[4], __le32 *top)
 {
 	Indirect *partial, *p;
@@ -1916,7 +1916,7 @@ static Indirect *ext3_find_shared(struct inode *inode, int depth,
 	/* Make k index the deepest non-null offest + 1 */
 	for (k = depth; k > 1 && !offsets[k-1]; k--)
 		;
-	partial = ext3_get_branch(inode, k, offsets, chain, &err);
+	partial = ext4_get_branch(inode, k, offsets, chain, &err);
 	/* Writer: pointers */
 	if (!partial)
 		partial = chain + k-1;
@@ -1939,7 +1939,7 @@ static Indirect *ext3_find_shared(struct inode *inode, int depth,
 		p->p--;
 	} else {
 		*top = *p->p;
-		/* Nope, don't do this in ext3.  Must leave the tree intact */
+		/* Nope, don't do this in ext4.  Must leave the tree intact */
 #if 0
 		*p->p = 0;
 #endif
@@ -1962,21 +1962,21 @@ no_top:
  * We release `count' blocks on disk, but (last - first) may be greater
  * than `count' because there can be holes in there.
  */
-static void ext3_clear_blocks(handle_t *handle, struct inode *inode,
-		struct buffer_head *bh, ext3_fsblk_t block_to_free,
+static void ext4_clear_blocks(handle_t *handle, struct inode *inode,
+		struct buffer_head *bh, ext4_fsblk_t block_to_free,
 		unsigned long count, __le32 *first, __le32 *last)
 {
 	__le32 *p;
 	if (try_to_extend_transaction(handle, inode)) {
 		if (bh) {
-			BUFFER_TRACE(bh, "call ext3_journal_dirty_metadata");
-			ext3_journal_dirty_metadata(handle, bh);
+			BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata");
+			ext4_journal_dirty_metadata(handle, bh);
 		}
-		ext3_mark_inode_dirty(handle, inode);
-		ext3_journal_test_restart(handle, inode);
+		ext4_mark_inode_dirty(handle, inode);
+		ext4_journal_test_restart(handle, inode);
 		if (bh) {
 			BUFFER_TRACE(bh, "retaking write access");
-			ext3_journal_get_write_access(handle, bh);
+			ext4_journal_get_write_access(handle, bh);
 		}
 	}
 
@@ -1995,15 +1995,15 @@ static void ext3_clear_blocks(handle_t *handle, struct inode *inode,
 
 			*p = 0;
 			bh = sb_find_get_block(inode->i_sb, nr);
-			ext3_forget(handle, 0, inode, bh, nr);
+			ext4_forget(handle, 0, inode, bh, nr);
 		}
 	}
 
-	ext3_free_blocks(handle, inode, block_to_free, count);
+	ext4_free_blocks(handle, inode, block_to_free, count);
 }
 
 /**
- * ext3_free_data - free a list of data blocks
+ * ext4_free_data - free a list of data blocks
  * @handle:	handle for this transaction
  * @inode:	inode we are dealing with
  * @this_bh:	indirect buffer_head which contains *@first and *@last
@@ -2021,23 +2021,23 @@ static void ext3_clear_blocks(handle_t *handle, struct inode *inode,
  * @this_bh will be %NULL if @first and @last point into the inode's direct
  * block pointers.
  */
-static void ext3_free_data(handle_t *handle, struct inode *inode,
+static void ext4_free_data(handle_t *handle, struct inode *inode,
 			   struct buffer_head *this_bh,
 			   __le32 *first, __le32 *last)
 {
-	ext3_fsblk_t block_to_free = 0;    /* Starting block # of a run */
+	ext4_fsblk_t block_to_free = 0;    /* Starting block # of a run */
 	unsigned long count = 0;	    /* Number of blocks in the run */
 	__le32 *block_to_free_p = NULL;	    /* Pointer into inode/ind
 					       corresponding to
 					       block_to_free */
-	ext3_fsblk_t nr;		    /* Current block # */
+	ext4_fsblk_t nr;		    /* Current block # */
 	__le32 *p;			    /* Pointer into inode/ind
 					       for current block */
 	int err;
 
 	if (this_bh) {				/* For indirect block */
 		BUFFER_TRACE(this_bh, "get_write_access");
-		err = ext3_journal_get_write_access(handle, this_bh);
+		err = ext4_journal_get_write_access(handle, this_bh);
 		/* Important: if we can't update the indirect pointers
 		 * to the blocks, we can't free them. */
 		if (err)
@@ -2055,7 +2055,7 @@ static void ext3_free_data(handle_t *handle, struct inode *inode,
 			} else if (nr == block_to_free + count) {
 				count++;
 			} else {
-				ext3_clear_blocks(handle, inode, this_bh,
+				ext4_clear_blocks(handle, inode, this_bh,
 						  block_to_free,
 						  count, block_to_free_p, p);
 				block_to_free = nr;
@@ -2066,17 +2066,17 @@ static void ext3_free_data(handle_t *handle, struct inode *inode,
 	}
 
 	if (count > 0)
-		ext3_clear_blocks(handle, inode, this_bh, block_to_free,
+		ext4_clear_blocks(handle, inode, this_bh, block_to_free,
 				  count, block_to_free_p, p);
 
 	if (this_bh) {
-		BUFFER_TRACE(this_bh, "call ext3_journal_dirty_metadata");
-		ext3_journal_dirty_metadata(handle, this_bh);
+		BUFFER_TRACE(this_bh, "call ext4_journal_dirty_metadata");
+		ext4_journal_dirty_metadata(handle, this_bh);
 	}
 }
 
 /**
- *	ext3_free_branches - free an array of branches
+ *	ext4_free_branches - free an array of branches
  *	@handle: JBD handle for this transaction
  *	@inode:	inode we are dealing with
  *	@parent_bh: the buffer_head which contains *@first and *@last
@@ -2088,11 +2088,11 @@ static void ext3_free_data(handle_t *handle, struct inode *inode,
  *	stored as little-endian 32-bit) and updating @inode->i_blocks
  *	appropriately.
  */
-static void ext3_free_branches(handle_t *handle, struct inode *inode,
+static void ext4_free_branches(handle_t *handle, struct inode *inode,
 			       struct buffer_head *parent_bh,
 			       __le32 *first, __le32 *last, int depth)
 {
-	ext3_fsblk_t nr;
+	ext4_fsblk_t nr;
 	__le32 *p;
 
 	if (is_handle_aborted(handle))
@@ -2100,7 +2100,7 @@ static void ext3_free_branches(handle_t *handle, struct inode *inode,
 
 	if (depth--) {
 		struct buffer_head *bh;
-		int addr_per_block = EXT3_ADDR_PER_BLOCK(inode->i_sb);
+		int addr_per_block = EXT4_ADDR_PER_BLOCK(inode->i_sb);
 		p = last;
 		while (--p >= first) {
 			nr = le32_to_cpu(*p);
@@ -2115,7 +2115,7 @@ static void ext3_free_branches(handle_t *handle, struct inode *inode,
 			 * (should be rare).
 			 */
 			if (!bh) {
-				ext3_error(inode->i_sb, "ext3_free_branches",
+				ext4_error(inode->i_sb, "ext4_free_branches",
 					   "Read failure, inode=%lu, block="E3FSBLK,
 					   inode->i_ino, nr);
 				continue;
@@ -2123,7 +2123,7 @@ static void ext3_free_branches(handle_t *handle, struct inode *inode,
 
 			/* This zaps the entire block.  Bottom up. */
 			BUFFER_TRACE(bh, "free child branches");
-			ext3_free_branches(handle, inode, bh,
+			ext4_free_branches(handle, inode, bh,
 					   (__le32*)bh->b_data,
 					   (__le32*)bh->b_data + addr_per_block,
 					   depth);
@@ -2138,7 +2138,7 @@ static void ext3_free_branches(handle_t *handle, struct inode *inode,
 			 * transaction.  But if it's part of the committing
 			 * transaction then journal_forget() will simply
 			 * brelse() it.  That means that if the underlying
-			 * block is reallocated in ext3_get_block(),
+			 * block is reallocated in ext4_get_block(),
 			 * unmap_underlying_metadata() will find this block
 			 * and will try to get rid of it.  damn, damn.
 			 *
@@ -2147,7 +2147,7 @@ static void ext3_free_branches(handle_t *handle, struct inode *inode,
 			 * revoke records must be emitted *before* clearing
 			 * this block's bit in the bitmaps.
 			 */
-			ext3_forget(handle, 1, inode, bh, bh->b_blocknr);
+			ext4_forget(handle, 1, inode, bh, bh->b_blocknr);
 
 			/*
 			 * Everything below this this pointer has been
@@ -2168,11 +2168,11 @@ static void ext3_free_branches(handle_t *handle, struct inode *inode,
 			if (is_handle_aborted(handle))
 				return;
 			if (try_to_extend_transaction(handle, inode)) {
-				ext3_mark_inode_dirty(handle, inode);
-				ext3_journal_test_restart(handle, inode);
+				ext4_mark_inode_dirty(handle, inode);
+				ext4_journal_test_restart(handle, inode);
 			}
 
-			ext3_free_blocks(handle, inode, nr, 1);
+			ext4_free_blocks(handle, inode, nr, 1);
 
 			if (parent_bh) {
 				/*
@@ -2180,12 +2180,12 @@ static void ext3_free_branches(handle_t *handle, struct inode *inode,
 				 * pointed to by an indirect block: journal it
 				 */
 				BUFFER_TRACE(parent_bh, "get_write_access");
-				if (!ext3_journal_get_write_access(handle,
+				if (!ext4_journal_get_write_access(handle,
 								   parent_bh)){
 					*p = 0;
 					BUFFER_TRACE(parent_bh,
-					"call ext3_journal_dirty_metadata");
-					ext3_journal_dirty_metadata(handle,
+					"call ext4_journal_dirty_metadata");
+					ext4_journal_dirty_metadata(handle,
 								    parent_bh);
 				}
 			}
@@ -2193,15 +2193,15 @@ static void ext3_free_branches(handle_t *handle, struct inode *inode,
 	} else {
 		/* We have reached the bottom of the tree. */
 		BUFFER_TRACE(parent_bh, "free data blocks");
-		ext3_free_data(handle, inode, parent_bh, first, last);
+		ext4_free_data(handle, inode, parent_bh, first, last);
 	}
 }
 
 /*
- * ext3_truncate()
+ * ext4_truncate()
  *
- * We block out ext3_get_block() block instantiations across the entire
- * transaction, and VFS/VM ensures that ext3_truncate() cannot run
+ * We block out ext4_get_block() block instantiations across the entire
+ * transaction, and VFS/VM ensures that ext4_truncate() cannot run
  * simultaneously on behalf of the same inode.
  *
  * As we work through the truncate and commmit bits of it to the journal there
@@ -2218,19 +2218,19 @@ static void ext3_free_branches(handle_t *handle, struct inode *inode,
  * truncate against the orphan inode list.
  *
  * The committed inode has the new, desired i_size (which is the same as
- * i_disksize in this case).  After a crash, ext3_orphan_cleanup() will see
+ * i_disksize in this case).  After a crash, ext4_orphan_cleanup() will see
  * that this inode's truncate did not complete and it will again call
- * ext3_truncate() to have another go.  So there will be instantiated blocks
- * to the right of the truncation point in a crashed ext3 filesystem.  But
+ * ext4_truncate() to have another go.  So there will be instantiated blocks
+ * to the right of the truncation point in a crashed ext4 filesystem.  But
  * that's fine - as long as they are linked from the inode, the post-crash
- * ext3_truncate() run will find them and release them.
+ * ext4_truncate() run will find them and release them.
  */
-void ext3_truncate(struct inode *inode)
+void ext4_truncate(struct inode *inode)
 {
 	handle_t *handle;
-	struct ext3_inode_info *ei = EXT3_I(inode);
+	struct ext4_inode_info *ei = EXT4_I(inode);
 	__le32 *i_data = ei->i_data;
-	int addr_per_block = EXT3_ADDR_PER_BLOCK(inode->i_sb);
+	int addr_per_block = EXT4_ADDR_PER_BLOCK(inode->i_sb);
 	struct address_space *mapping = inode->i_mapping;
 	int offsets[4];
 	Indirect chain[4];
@@ -2244,7 +2244,7 @@ void ext3_truncate(struct inode *inode)
 	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
 	    S_ISLNK(inode->i_mode)))
 		return;
-	if (ext3_inode_is_fast_symlink(inode))
+	if (ext4_inode_is_fast_symlink(inode))
 		return;
 	if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
 		return;
@@ -2275,12 +2275,12 @@ void ext3_truncate(struct inode *inode)
 	}
 
 	last_block = (inode->i_size + blocksize-1)
-					>> EXT3_BLOCK_SIZE_BITS(inode->i_sb);
+					>> EXT4_BLOCK_SIZE_BITS(inode->i_sb);
 
 	if (page)
-		ext3_block_truncate_page(handle, page, mapping, inode->i_size);
+		ext4_block_truncate_page(handle, page, mapping, inode->i_size);
 
-	n = ext3_block_to_path(inode, last_block, offsets, NULL);
+	n = ext4_block_to_path(inode, last_block, offsets, NULL);
 	if (n == 0)
 		goto out_stop;	/* error */
 
@@ -2293,7 +2293,7 @@ void ext3_truncate(struct inode *inode)
 	 * Implication: the file must always be in a sane, consistent
 	 * truncatable state while each transaction commits.
 	 */
-	if (ext3_orphan_add(handle, inode))
+	if (ext4_orphan_add(handle, inode))
 		goto out_stop;
 
 	/*
@@ -2301,28 +2301,28 @@ void ext3_truncate(struct inode *inode)
 	 * occurs before the truncate completes, so it is now safe to propagate
 	 * the new, shorter inode size (held for now in i_size) into the
 	 * on-disk inode. We do this via i_disksize, which is the value which
-	 * ext3 *really* writes onto the disk inode.
+	 * ext4 *really* writes onto the disk inode.
 	 */
 	ei->i_disksize = inode->i_size;
 
 	/*
-	 * From here we block out all ext3_get_block() callers who want to
+	 * From here we block out all ext4_get_block() callers who want to
 	 * modify the block allocation tree.
 	 */
 	mutex_lock(&ei->truncate_mutex);
 
 	if (n == 1) {		/* direct blocks */
-		ext3_free_data(handle, inode, NULL, i_data+offsets[0],
-			       i_data + EXT3_NDIR_BLOCKS);
+		ext4_free_data(handle, inode, NULL, i_data+offsets[0],
+			       i_data + EXT4_NDIR_BLOCKS);
 		goto do_indirects;
 	}
 
-	partial = ext3_find_shared(inode, n, offsets, chain, &nr);
+	partial = ext4_find_shared(inode, n, offsets, chain, &nr);
 	/* Kill the top of shared branch (not detached) */
 	if (nr) {
 		if (partial == chain) {
 			/* Shared branch grows from the inode */
-			ext3_free_branches(handle, inode, NULL,
+			ext4_free_branches(handle, inode, NULL,
 					   &nr, &nr+1, (chain+n-1) - partial);
 			*partial->p = 0;
 			/*
@@ -2332,14 +2332,14 @@ void ext3_truncate(struct inode *inode)
 		} else {
 			/* Shared branch grows from an indirect block */
 			BUFFER_TRACE(partial->bh, "get_write_access");
-			ext3_free_branches(handle, inode, partial->bh,
+			ext4_free_branches(handle, inode, partial->bh,
 					partial->p,
 					partial->p+1, (chain+n-1) - partial);
 		}
 	}
 	/* Clear the ends of indirect blocks on the shared branch */
 	while (partial > chain) {
-		ext3_free_branches(handle, inode, partial->bh, partial->p + 1,
+		ext4_free_branches(handle, inode, partial->bh, partial->p + 1,
 				   (__le32*)partial->bh->b_data+addr_per_block,
 				   (chain+n-1) - partial);
 		BUFFER_TRACE(partial->bh, "call brelse");
@@ -2350,32 +2350,32 @@ do_indirects:
 	/* Kill the remaining (whole) subtrees */
 	switch (offsets[0]) {
 	default:
-		nr = i_data[EXT3_IND_BLOCK];
+		nr = i_data[EXT4_IND_BLOCK];
 		if (nr) {
-			ext3_free_branches(handle, inode, NULL, &nr, &nr+1, 1);
-			i_data[EXT3_IND_BLOCK] = 0;
+			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 1);
+			i_data[EXT4_IND_BLOCK] = 0;
 		}
-	case EXT3_IND_BLOCK:
-		nr = i_data[EXT3_DIND_BLOCK];
+	case EXT4_IND_BLOCK:
+		nr = i_data[EXT4_DIND_BLOCK];
 		if (nr) {
-			ext3_free_branches(handle, inode, NULL, &nr, &nr+1, 2);
-			i_data[EXT3_DIND_BLOCK] = 0;
+			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 2);
+			i_data[EXT4_DIND_BLOCK] = 0;
 		}
-	case EXT3_DIND_BLOCK:
-		nr = i_data[EXT3_TIND_BLOCK];
+	case EXT4_DIND_BLOCK:
+		nr = i_data[EXT4_TIND_BLOCK];
 		if (nr) {
-			ext3_free_branches(handle, inode, NULL, &nr, &nr+1, 3);
-			i_data[EXT3_TIND_BLOCK] = 0;
+			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 3);
+			i_data[EXT4_TIND_BLOCK] = 0;
 		}
-	case EXT3_TIND_BLOCK:
+	case EXT4_TIND_BLOCK:
 		;
 	}
 
-	ext3_discard_reservation(inode);
+	ext4_discard_reservation(inode);
 
 	mutex_unlock(&ei->truncate_mutex);
 	inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
-	ext3_mark_inode_dirty(handle, inode);
+	ext4_mark_inode_dirty(handle, inode);
 
 	/*
 	 * In a multi-transaction truncate, we only make the final transaction
@@ -2388,25 +2388,25 @@ out_stop:
 	 * If this was a simple ftruncate(), and the file will remain alive
 	 * then we need to clear up the orphan record which we created above.
 	 * However, if this was a real unlink then we were called by
-	 * ext3_delete_inode(), and we allow that function to clean up the
+	 * ext4_delete_inode(), and we allow that function to clean up the
 	 * orphan info for us.
 	 */
 	if (inode->i_nlink)
-		ext3_orphan_del(handle, inode);
+		ext4_orphan_del(handle, inode);
 
-	ext3_journal_stop(handle);
+	ext4_journal_stop(handle);
 }
 
-static ext3_fsblk_t ext3_get_inode_block(struct super_block *sb,
-		unsigned long ino, struct ext3_iloc *iloc)
+static ext4_fsblk_t ext4_get_inode_block(struct super_block *sb,
+		unsigned long ino, struct ext4_iloc *iloc)
 {
 	unsigned long desc, group_desc, block_group;
 	unsigned long offset;
-	ext3_fsblk_t block;
+	ext4_fsblk_t block;
 	struct buffer_head *bh;
-	struct ext3_group_desc * gdp;
+	struct ext4_group_desc * gdp;
 
-	if (!ext3_valid_inum(sb, ino)) {
+	if (!ext4_valid_inum(sb, ino)) {
 		/*
 		 * This error is already checked for in namei.c unless we are
 		 * looking at an NFS filehandle, in which case no error
@@ -2415,54 +2415,54 @@ static ext3_fsblk_t ext3_get_inode_block(struct super_block *sb,
 		return 0;
 	}
 
-	block_group = (ino - 1) / EXT3_INODES_PER_GROUP(sb);
-	if (block_group >= EXT3_SB(sb)->s_groups_count) {
-		ext3_error(sb,"ext3_get_inode_block","group >= groups count");
+	block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb);
+	if (block_group >= EXT4_SB(sb)->s_groups_count) {
+		ext4_error(sb,"ext4_get_inode_block","group >= groups count");
 		return 0;
 	}
 	smp_rmb();
-	group_desc = block_group >> EXT3_DESC_PER_BLOCK_BITS(sb);
-	desc = block_group & (EXT3_DESC_PER_BLOCK(sb) - 1);
-	bh = EXT3_SB(sb)->s_group_desc[group_desc];
+	group_desc = block_group >> EXT4_DESC_PER_BLOCK_BITS(sb);
+	desc = block_group & (EXT4_DESC_PER_BLOCK(sb) - 1);
+	bh = EXT4_SB(sb)->s_group_desc[group_desc];
 	if (!bh) {
-		ext3_error (sb, "ext3_get_inode_block",
+		ext4_error (sb, "ext4_get_inode_block",
 			    "Descriptor not loaded");
 		return 0;
 	}
 
-	gdp = (struct ext3_group_desc *)bh->b_data;
+	gdp = (struct ext4_group_desc *)bh->b_data;
 	/*
 	 * Figure out the offset within the block group inode table
 	 */
-	offset = ((ino - 1) % EXT3_INODES_PER_GROUP(sb)) *
-		EXT3_INODE_SIZE(sb);
+	offset = ((ino - 1) % EXT4_INODES_PER_GROUP(sb)) *
+		EXT4_INODE_SIZE(sb);
 	block = le32_to_cpu(gdp[desc].bg_inode_table) +
-		(offset >> EXT3_BLOCK_SIZE_BITS(sb));
+		(offset >> EXT4_BLOCK_SIZE_BITS(sb));
 
 	iloc->block_group = block_group;
-	iloc->offset = offset & (EXT3_BLOCK_SIZE(sb) - 1);
+	iloc->offset = offset & (EXT4_BLOCK_SIZE(sb) - 1);
 	return block;
 }
 
 /*
- * ext3_get_inode_loc returns with an extra refcount against the inode's
+ * ext4_get_inode_loc returns with an extra refcount against the inode's
  * underlying buffer_head on success. If 'in_mem' is true, we have all
  * data in memory that is needed to recreate the on-disk version of this
  * inode.
  */
-static int __ext3_get_inode_loc(struct inode *inode,
-				struct ext3_iloc *iloc, int in_mem)
+static int __ext4_get_inode_loc(struct inode *inode,
+				struct ext4_iloc *iloc, int in_mem)
 {
-	ext3_fsblk_t block;
+	ext4_fsblk_t block;
 	struct buffer_head *bh;
 
-	block = ext3_get_inode_block(inode->i_sb, inode->i_ino, iloc);
+	block = ext4_get_inode_block(inode->i_sb, inode->i_ino, iloc);
 	if (!block)
 		return -EIO;
 
 	bh = sb_getblk(inode->i_sb, block);
 	if (!bh) {
-		ext3_error (inode->i_sb, "ext3_get_inode_loc",
+		ext4_error (inode->i_sb, "ext4_get_inode_loc",
 				"unable to read inode block - "
 				"inode=%lu, block="E3FSBLK,
 				 inode->i_ino, block);
@@ -2483,22 +2483,22 @@ static int __ext3_get_inode_loc(struct inode *inode,
 		 */
 		if (in_mem) {
 			struct buffer_head *bitmap_bh;
-			struct ext3_group_desc *desc;
+			struct ext4_group_desc *desc;
 			int inodes_per_buffer;
 			int inode_offset, i;
 			int block_group;
 			int start;
 
 			block_group = (inode->i_ino - 1) /
-					EXT3_INODES_PER_GROUP(inode->i_sb);
+					EXT4_INODES_PER_GROUP(inode->i_sb);
 			inodes_per_buffer = bh->b_size /
-				EXT3_INODE_SIZE(inode->i_sb);
+				EXT4_INODE_SIZE(inode->i_sb);
 			inode_offset = ((inode->i_ino - 1) %
-					EXT3_INODES_PER_GROUP(inode->i_sb));
+					EXT4_INODES_PER_GROUP(inode->i_sb));
 			start = inode_offset & ~(inodes_per_buffer - 1);
 
 			/* Is the inode bitmap in cache? */
-			desc = ext3_get_group_desc(inode->i_sb,
+			desc = ext4_get_group_desc(inode->i_sb,
 						block_group, NULL);
 			if (!desc)
 				goto make_io;
@@ -2520,7 +2520,7 @@ static int __ext3_get_inode_loc(struct inode *inode,
 			for (i = start; i < start + inodes_per_buffer; i++) {
 				if (i == inode_offset)
 					continue;
-				if (ext3_test_bit(i, bitmap_bh->b_data))
+				if (ext4_test_bit(i, bitmap_bh->b_data))
 					break;
 			}
 			brelse(bitmap_bh);
@@ -2544,7 +2544,7 @@ make_io:
 		submit_bh(READ_META, bh);
 		wait_on_buffer(bh);
 		if (!buffer_uptodate(bh)) {
-			ext3_error(inode->i_sb, "ext3_get_inode_loc",
+			ext4_error(inode->i_sb, "ext4_get_inode_loc",
 					"unable to read inode block - "
 					"inode=%lu, block="E3FSBLK,
 					inode->i_ino, block);
@@ -2557,48 +2557,48 @@ has_buffer:
 	return 0;
 }
 
-int ext3_get_inode_loc(struct inode *inode, struct ext3_iloc *iloc)
+int ext4_get_inode_loc(struct inode *inode, struct ext4_iloc *iloc)
 {
 	/* We have all inode data except xattrs in memory here. */
-	return __ext3_get_inode_loc(inode, iloc,
-		!(EXT3_I(inode)->i_state & EXT3_STATE_XATTR));
+	return __ext4_get_inode_loc(inode, iloc,
+		!(EXT4_I(inode)->i_state & EXT4_STATE_XATTR));
 }
 
-void ext3_set_inode_flags(struct inode *inode)
+void ext4_set_inode_flags(struct inode *inode)
 {
-	unsigned int flags = EXT3_I(inode)->i_flags;
+	unsigned int flags = EXT4_I(inode)->i_flags;
 
 	inode->i_flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC);
-	if (flags & EXT3_SYNC_FL)
+	if (flags & EXT4_SYNC_FL)
 		inode->i_flags |= S_SYNC;
-	if (flags & EXT3_APPEND_FL)
+	if (flags & EXT4_APPEND_FL)
 		inode->i_flags |= S_APPEND;
-	if (flags & EXT3_IMMUTABLE_FL)
+	if (flags & EXT4_IMMUTABLE_FL)
 		inode->i_flags |= S_IMMUTABLE;
-	if (flags & EXT3_NOATIME_FL)
+	if (flags & EXT4_NOATIME_FL)
 		inode->i_flags |= S_NOATIME;
-	if (flags & EXT3_DIRSYNC_FL)
+	if (flags & EXT4_DIRSYNC_FL)
 		inode->i_flags |= S_DIRSYNC;
 }
 
-void ext3_read_inode(struct inode * inode)
+void ext4_read_inode(struct inode * inode)
 {
-	struct ext3_iloc iloc;
-	struct ext3_inode *raw_inode;
-	struct ext3_inode_info *ei = EXT3_I(inode);
+	struct ext4_iloc iloc;
+	struct ext4_inode *raw_inode;
+	struct ext4_inode_info *ei = EXT4_I(inode);
 	struct buffer_head *bh;
 	int block;
 
-#ifdef CONFIG_EXT3_FS_POSIX_ACL
-	ei->i_acl = EXT3_ACL_NOT_CACHED;
-	ei->i_default_acl = EXT3_ACL_NOT_CACHED;
+#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+	ei->i_acl = EXT4_ACL_NOT_CACHED;
+	ei->i_default_acl = EXT4_ACL_NOT_CACHED;
 #endif
 	ei->i_block_alloc_info = NULL;
 
-	if (__ext3_get_inode_loc(inode, &iloc, 0))
+	if (__ext4_get_inode_loc(inode, &iloc, 0))
 		goto bad_inode;
 	bh = iloc.bh;
-	raw_inode = ext3_raw_inode(&iloc);
+	raw_inode = ext4_raw_inode(&iloc);
 	inode->i_mode = le16_to_cpu(raw_inode->i_mode);
 	inode->i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);
 	inode->i_gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low);
@@ -2623,7 +2623,7 @@ void ext3_read_inode(struct inode * inode)
 	 */
 	if (inode->i_nlink == 0) {
 		if (inode->i_mode == 0 ||
-		    !(EXT3_SB(inode->i_sb)->s_mount_state & EXT3_ORPHAN_FS)) {
+		    !(EXT4_SB(inode->i_sb)->s_mount_state & EXT4_ORPHAN_FS)) {
 			/* this inode is deleted */
 			brelse (bh);
 			goto bad_inode;
@@ -2635,7 +2635,7 @@ void ext3_read_inode(struct inode * inode)
 	}
 	inode->i_blocks = le32_to_cpu(raw_inode->i_blocks);
 	ei->i_flags = le32_to_cpu(raw_inode->i_flags);
-#ifdef EXT3_FRAGMENTS
+#ifdef EXT4_FRAGMENTS
 	ei->i_faddr = le32_to_cpu(raw_inode->i_faddr);
 	ei->i_frag_no = raw_inode->i_frag;
 	ei->i_frag_size = raw_inode->i_fsize;
@@ -2654,51 +2654,51 @@ void ext3_read_inode(struct inode * inode)
 	 * NOTE! The in-memory inode i_data array is in little-endian order
 	 * even on big-endian machines: we do NOT byteswap the block numbers!
 	 */
-	for (block = 0; block < EXT3_N_BLOCKS; block++)
+	for (block = 0; block < EXT4_N_BLOCKS; block++)
 		ei->i_data[block] = raw_inode->i_block[block];
 	INIT_LIST_HEAD(&ei->i_orphan);
 
-	if (inode->i_ino >= EXT3_FIRST_INO(inode->i_sb) + 1 &&
-	    EXT3_INODE_SIZE(inode->i_sb) > EXT3_GOOD_OLD_INODE_SIZE) {
+	if (inode->i_ino >= EXT4_FIRST_INO(inode->i_sb) + 1 &&
+	    EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) {
 		/*
 		 * When mke2fs creates big inodes it does not zero out
-		 * the unused bytes above EXT3_GOOD_OLD_INODE_SIZE,
+		 * the unused bytes above EXT4_GOOD_OLD_INODE_SIZE,
 		 * so ignore those first few inodes.
 		 */
 		ei->i_extra_isize = le16_to_cpu(raw_inode->i_extra_isize);
-		if (EXT3_GOOD_OLD_INODE_SIZE + ei->i_extra_isize >
-		    EXT3_INODE_SIZE(inode->i_sb))
+		if (EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize >
+		    EXT4_INODE_SIZE(inode->i_sb))
 			goto bad_inode;
 		if (ei->i_extra_isize == 0) {
 			/* The extra space is currently unused. Use it. */
-			ei->i_extra_isize = sizeof(struct ext3_inode) -
-					    EXT3_GOOD_OLD_INODE_SIZE;
+			ei->i_extra_isize = sizeof(struct ext4_inode) -
+					    EXT4_GOOD_OLD_INODE_SIZE;
 		} else {
 			__le32 *magic = (void *)raw_inode +
-					EXT3_GOOD_OLD_INODE_SIZE +
+					EXT4_GOOD_OLD_INODE_SIZE +
 					ei->i_extra_isize;
-			if (*magic == cpu_to_le32(EXT3_XATTR_MAGIC))
-				 ei->i_state |= EXT3_STATE_XATTR;
+			if (*magic == cpu_to_le32(EXT4_XATTR_MAGIC))
+				 ei->i_state |= EXT4_STATE_XATTR;
 		}
 	} else
 		ei->i_extra_isize = 0;
 
 	if (S_ISREG(inode->i_mode)) {
-		inode->i_op = &ext3_file_inode_operations;
-		inode->i_fop = &ext3_file_operations;
-		ext3_set_aops(inode);
+		inode->i_op = &ext4_file_inode_operations;
+		inode->i_fop = &ext4_file_operations;
+		ext4_set_aops(inode);
 	} else if (S_ISDIR(inode->i_mode)) {
-		inode->i_op = &ext3_dir_inode_operations;
-		inode->i_fop = &ext3_dir_operations;
+		inode->i_op = &ext4_dir_inode_operations;
+		inode->i_fop = &ext4_dir_operations;
 	} else if (S_ISLNK(inode->i_mode)) {
-		if (ext3_inode_is_fast_symlink(inode))
-			inode->i_op = &ext3_fast_symlink_inode_operations;
+		if (ext4_inode_is_fast_symlink(inode))
+			inode->i_op = &ext4_fast_symlink_inode_operations;
 		else {
-			inode->i_op = &ext3_symlink_inode_operations;
-			ext3_set_aops(inode);
+			inode->i_op = &ext4_symlink_inode_operations;
+			ext4_set_aops(inode);
 		}
 	} else {
-		inode->i_op = &ext3_special_inode_operations;
+		inode->i_op = &ext4_special_inode_operations;
 		if (raw_inode->i_block[0])
 			init_special_inode(inode, inode->i_mode,
 			   old_decode_dev(le32_to_cpu(raw_inode->i_block[0])));
@@ -2707,7 +2707,7 @@ void ext3_read_inode(struct inode * inode)
 			   new_decode_dev(le32_to_cpu(raw_inode->i_block[1])));
 	}
 	brelse (iloc.bh);
-	ext3_set_inode_flags(inode);
+	ext4_set_inode_flags(inode);
 	return;
 
 bad_inode:
@@ -2722,19 +2722,19 @@ bad_inode:
  *
  * The caller must have write access to iloc->bh.
  */
-static int ext3_do_update_inode(handle_t *handle,
+static int ext4_do_update_inode(handle_t *handle,
 				struct inode *inode,
-				struct ext3_iloc *iloc)
+				struct ext4_iloc *iloc)
 {
-	struct ext3_inode *raw_inode = ext3_raw_inode(iloc);
-	struct ext3_inode_info *ei = EXT3_I(inode);
+	struct ext4_inode *raw_inode = ext4_raw_inode(iloc);
+	struct ext4_inode_info *ei = EXT4_I(inode);
 	struct buffer_head *bh = iloc->bh;
 	int err = 0, rc, block;
 
 	/* For fields not not tracking in the in-memory inode,
 	 * initialise them to zero for new inodes. */
-	if (ei->i_state & EXT3_STATE_NEW)
-		memset(raw_inode, 0, EXT3_SB(inode->i_sb)->s_inode_size);
+	if (ei->i_state & EXT4_STATE_NEW)
+		memset(raw_inode, 0, EXT4_SB(inode->i_sb)->s_inode_size);
 
 	raw_inode->i_mode = cpu_to_le16(inode->i_mode);
 	if(!(test_opt(inode->i_sb, NO_UID32))) {
@@ -2769,7 +2769,7 @@ static int ext3_do_update_inode(handle_t *handle,
 	raw_inode->i_blocks = cpu_to_le32(inode->i_blocks);
 	raw_inode->i_dtime = cpu_to_le32(ei->i_dtime);
 	raw_inode->i_flags = cpu_to_le32(ei->i_flags);
-#ifdef EXT3_FRAGMENTS
+#ifdef EXT4_FRAGMENTS
 	raw_inode->i_faddr = cpu_to_le32(ei->i_faddr);
 	raw_inode->i_frag = ei->i_frag_no;
 	raw_inode->i_fsize = ei->i_frag_size;
@@ -2782,24 +2782,24 @@ static int ext3_do_update_inode(handle_t *handle,
 			cpu_to_le32(ei->i_disksize >> 32);
 		if (ei->i_disksize > 0x7fffffffULL) {
 			struct super_block *sb = inode->i_sb;
-			if (!EXT3_HAS_RO_COMPAT_FEATURE(sb,
-					EXT3_FEATURE_RO_COMPAT_LARGE_FILE) ||
-			    EXT3_SB(sb)->s_es->s_rev_level ==
-					cpu_to_le32(EXT3_GOOD_OLD_REV)) {
+			if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
+					EXT4_FEATURE_RO_COMPAT_LARGE_FILE) ||
+			    EXT4_SB(sb)->s_es->s_rev_level ==
+					cpu_to_le32(EXT4_GOOD_OLD_REV)) {
 			       /* If this is the first large file
 				* created, add a flag to the superblock.
 				*/
-				err = ext3_journal_get_write_access(handle,
-						EXT3_SB(sb)->s_sbh);
+				err = ext4_journal_get_write_access(handle,
+						EXT4_SB(sb)->s_sbh);
 				if (err)
 					goto out_brelse;
-				ext3_update_dynamic_rev(sb);
-				EXT3_SET_RO_COMPAT_FEATURE(sb,
-					EXT3_FEATURE_RO_COMPAT_LARGE_FILE);
+				ext4_update_dynamic_rev(sb);
+				EXT4_SET_RO_COMPAT_FEATURE(sb,
+					EXT4_FEATURE_RO_COMPAT_LARGE_FILE);
 				sb->s_dirt = 1;
 				handle->h_sync = 1;
-				err = ext3_journal_dirty_metadata(handle,
-						EXT3_SB(sb)->s_sbh);
+				err = ext4_journal_dirty_metadata(handle,
+						EXT4_SB(sb)->s_sbh);
 			}
 		}
 	}
@@ -2815,26 +2815,26 @@ static int ext3_do_update_inode(handle_t *handle,
 				cpu_to_le32(new_encode_dev(inode->i_rdev));
 			raw_inode->i_block[2] = 0;
 		}
-	} else for (block = 0; block < EXT3_N_BLOCKS; block++)
+	} else for (block = 0; block < EXT4_N_BLOCKS; block++)
 		raw_inode->i_block[block] = ei->i_data[block];
 
 	if (ei->i_extra_isize)
 		raw_inode->i_extra_isize = cpu_to_le16(ei->i_extra_isize);
 
-	BUFFER_TRACE(bh, "call ext3_journal_dirty_metadata");
-	rc = ext3_journal_dirty_metadata(handle, bh);
+	BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata");
+	rc = ext4_journal_dirty_metadata(handle, bh);
 	if (!err)
 		err = rc;
-	ei->i_state &= ~EXT3_STATE_NEW;
+	ei->i_state &= ~EXT4_STATE_NEW;
 
 out_brelse:
 	brelse (bh);
-	ext3_std_error(inode->i_sb, err);
+	ext4_std_error(inode->i_sb, err);
 	return err;
 }
 
 /*
- * ext3_write_inode()
+ * ext4_write_inode()
  *
  * We are called from a few places:
  *
@@ -2851,7 +2851,7 @@ out_brelse:
  *
  * In all cases it is actually safe for us to return without doing anything,
  * because the inode has been copied into a raw inode buffer in
- * ext3_mark_inode_dirty().  This is a correctness thing for O_SYNC and for
+ * ext4_mark_inode_dirty().  This is a correctness thing for O_SYNC and for
  * knfsd.
  *
  * Note that we are absolutely dependent upon all inode dirtiers doing the
@@ -2868,12 +2868,12 @@ out_brelse:
  * `stuff()' is running, and the new i_size will be lost.  Plus the inode
  * will no longer be on the superblock's dirty inode list.
  */
-int ext3_write_inode(struct inode *inode, int wait)
+int ext4_write_inode(struct inode *inode, int wait)
 {
 	if (current->flags & PF_MEMALLOC)
 		return 0;
 
-	if (ext3_journal_current_handle()) {
+	if (ext4_journal_current_handle()) {
 		jbd_debug(0, "called recursively, non-PF_MEMALLOC!\n");
 		dump_stack();
 		return -EIO;
@@ -2882,11 +2882,11 @@ int ext3_write_inode(struct inode *inode, int wait)
 	if (!wait)
 		return 0;
 
-	return ext3_force_commit(inode->i_sb);
+	return ext4_force_commit(inode->i_sb);
 }
 
 /*
- * ext3_setattr()
+ * ext4_setattr()
  *
  * Called from notify_change.
  *
@@ -2902,7 +2902,7 @@ int ext3_write_inode(struct inode *inode, int wait)
  *
  * Called with inode->sem down.
  */
-int ext3_setattr(struct dentry *dentry, struct iattr *attr)
+int ext4_setattr(struct dentry *dentry, struct iattr *attr)
 {
 	struct inode *inode = dentry->d_inode;
 	int error, rc = 0;
@@ -2918,15 +2918,15 @@ int ext3_setattr(struct dentry *dentry, struct iattr *attr)
 
 		/* (user+group)*(old+new) structure, inode write (sb,
 		 * inode block, ? - but truncate inode update has it) */
-		handle = ext3_journal_start(inode, 2*(EXT3_QUOTA_INIT_BLOCKS(inode->i_sb)+
-					EXT3_QUOTA_DEL_BLOCKS(inode->i_sb))+3);
+		handle = ext4_journal_start(inode, 2*(EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)+
+					EXT4_QUOTA_DEL_BLOCKS(inode->i_sb))+3);
 		if (IS_ERR(handle)) {
 			error = PTR_ERR(handle);
 			goto err_out;
 		}
 		error = DQUOT_TRANSFER(inode, attr) ? -EDQUOT : 0;
 		if (error) {
-			ext3_journal_stop(handle);
+			ext4_journal_stop(handle);
 			return error;
 		}
 		/* Update corresponding info in inode so that everything is in
@@ -2935,41 +2935,41 @@ int ext3_setattr(struct dentry *dentry, struct iattr *attr)
 			inode->i_uid = attr->ia_uid;
 		if (attr->ia_valid & ATTR_GID)
 			inode->i_gid = attr->ia_gid;
-		error = ext3_mark_inode_dirty(handle, inode);
-		ext3_journal_stop(handle);
+		error = ext4_mark_inode_dirty(handle, inode);
+		ext4_journal_stop(handle);
 	}
 
 	if (S_ISREG(inode->i_mode) &&
 	    attr->ia_valid & ATTR_SIZE && attr->ia_size < inode->i_size) {
 		handle_t *handle;
 
-		handle = ext3_journal_start(inode, 3);
+		handle = ext4_journal_start(inode, 3);
 		if (IS_ERR(handle)) {
 			error = PTR_ERR(handle);
 			goto err_out;
 		}
 
-		error = ext3_orphan_add(handle, inode);
-		EXT3_I(inode)->i_disksize = attr->ia_size;
-		rc = ext3_mark_inode_dirty(handle, inode);
+		error = ext4_orphan_add(handle, inode);
+		EXT4_I(inode)->i_disksize = attr->ia_size;
+		rc = ext4_mark_inode_dirty(handle, inode);
 		if (!error)
 			error = rc;
-		ext3_journal_stop(handle);
+		ext4_journal_stop(handle);
 	}
 
 	rc = inode_setattr(inode, attr);
 
-	/* If inode_setattr's call to ext3_truncate failed to get a
+	/* If inode_setattr's call to ext4_truncate failed to get a
 	 * transaction handle at all, we need to clean up the in-core
 	 * orphan list manually. */
 	if (inode->i_nlink)
-		ext3_orphan_del(NULL, inode);
+		ext4_orphan_del(NULL, inode);
 
 	if (!rc && (ia_valid & ATTR_MODE))
-		rc = ext3_acl_chmod(inode);
+		rc = ext4_acl_chmod(inode);
 
 err_out:
-	ext3_std_error(inode->i_sb, error);
+	ext4_std_error(inode->i_sb, error);
 	if (!error)
 		error = rc;
 	return error;
@@ -2988,9 +2988,9 @@ err_out:
  * N+5 group descriptor summary blocks
  * 1 inode block
  * 1 superblock.
- * 2 * EXT3_SINGLEDATA_TRANS_BLOCKS for the quote files
+ * 2 * EXT4_SINGLEDATA_TRANS_BLOCKS for the quote files
  *
- * 3 * (N + 5) + 2 + 2 * EXT3_SINGLEDATA_TRANS_BLOCKS
+ * 3 * (N + 5) + 2 + 2 * EXT4_SINGLEDATA_TRANS_BLOCKS
  *
  * With ordered or writeback data it's the same, less the N data blocks.
  *
@@ -3003,13 +3003,13 @@ err_out:
  * block and work out the exact number of indirects which are touched.  Pah.
  */
 
-static int ext3_writepage_trans_blocks(struct inode *inode)
+static int ext4_writepage_trans_blocks(struct inode *inode)
 {
-	int bpp = ext3_journal_blocks_per_page(inode);
-	int indirects = (EXT3_NDIR_BLOCKS % bpp) ? 5 : 3;
+	int bpp = ext4_journal_blocks_per_page(inode);
+	int indirects = (EXT4_NDIR_BLOCKS % bpp) ? 5 : 3;
 	int ret;
 
-	if (ext3_should_journal_data(inode))
+	if (ext4_should_journal_data(inode))
 		ret = 3 * (bpp + indirects) + 2;
 	else
 		ret = 2 * (bpp + indirects) + 2;
@@ -3017,26 +3017,26 @@ static int ext3_writepage_trans_blocks(struct inode *inode)
 #ifdef CONFIG_QUOTA
 	/* We know that structure was already allocated during DQUOT_INIT so
 	 * we will be updating only the data blocks + inodes */
-	ret += 2*EXT3_QUOTA_TRANS_BLOCKS(inode->i_sb);
+	ret += 2*EXT4_QUOTA_TRANS_BLOCKS(inode->i_sb);
 #endif
 
 	return ret;
 }
 
 /*
- * The caller must have previously called ext3_reserve_inode_write().
+ * The caller must have previously called ext4_reserve_inode_write().
  * Give this, we know that the caller already has write access to iloc->bh.
  */
-int ext3_mark_iloc_dirty(handle_t *handle,
-		struct inode *inode, struct ext3_iloc *iloc)
+int ext4_mark_iloc_dirty(handle_t *handle,
+		struct inode *inode, struct ext4_iloc *iloc)
 {
 	int err = 0;
 
 	/* the do_update_inode consumes one bh->b_count */
 	get_bh(iloc->bh);
 
-	/* ext3_do_update_inode() does journal_dirty_metadata */
-	err = ext3_do_update_inode(handle, inode, iloc);
+	/* ext4_do_update_inode() does journal_dirty_metadata */
+	err = ext4_do_update_inode(handle, inode, iloc);
 	put_bh(iloc->bh);
 	return err;
 }
@@ -3047,22 +3047,22 @@ int ext3_mark_iloc_dirty(handle_t *handle,
  */
 
 int
-ext3_reserve_inode_write(handle_t *handle, struct inode *inode,
-			 struct ext3_iloc *iloc)
+ext4_reserve_inode_write(handle_t *handle, struct inode *inode,
+			 struct ext4_iloc *iloc)
 {
 	int err = 0;
 	if (handle) {
-		err = ext3_get_inode_loc(inode, iloc);
+		err = ext4_get_inode_loc(inode, iloc);
 		if (!err) {
 			BUFFER_TRACE(iloc->bh, "get_write_access");
-			err = ext3_journal_get_write_access(handle, iloc->bh);
+			err = ext4_journal_get_write_access(handle, iloc->bh);
 			if (err) {
 				brelse(iloc->bh);
 				iloc->bh = NULL;
 			}
 		}
 	}
-	ext3_std_error(inode->i_sb, err);
+	ext4_std_error(inode->i_sb, err);
 	return err;
 }
 
@@ -3087,20 +3087,20 @@ ext3_reserve_inode_write(handle_t *handle, struct inode *inode,
  * to do a write_super() to free up some memory.  It has the desired
  * effect.
  */
-int ext3_mark_inode_dirty(handle_t *handle, struct inode *inode)
+int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode)
 {
-	struct ext3_iloc iloc;
+	struct ext4_iloc iloc;
 	int err;
 
 	might_sleep();
-	err = ext3_reserve_inode_write(handle, inode, &iloc);
+	err = ext4_reserve_inode_write(handle, inode, &iloc);
 	if (!err)
-		err = ext3_mark_iloc_dirty(handle, inode, &iloc);
+		err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 	return err;
 }
 
 /*
- * ext3_dirty_inode() is called from __mark_inode_dirty()
+ * ext4_dirty_inode() is called from __mark_inode_dirty()
  *
  * We're really interested in the case where a file is being extended.
  * i_size has been changed by generic_commit_write() and we thus need
@@ -3113,12 +3113,12 @@ int ext3_mark_inode_dirty(handle_t *handle, struct inode *inode)
  * so would cause a commit on atime updates, which we don't bother doing.
  * We handle synchronous inodes at the highest possible level.
  */
-void ext3_dirty_inode(struct inode *inode)
+void ext4_dirty_inode(struct inode *inode)
 {
-	handle_t *current_handle = ext3_journal_current_handle();
+	handle_t *current_handle = ext4_journal_current_handle();
 	handle_t *handle;
 
-	handle = ext3_journal_start(inode, 2);
+	handle = ext4_journal_start(inode, 2);
 	if (IS_ERR(handle))
 		goto out;
 	if (current_handle &&
@@ -3129,9 +3129,9 @@ void ext3_dirty_inode(struct inode *inode)
 	} else {
 		jbd_debug(5, "marking dirty.  outer handle=%p\n",
 				current_handle);
-		ext3_mark_inode_dirty(handle, inode);
+		ext4_mark_inode_dirty(handle, inode);
 	}
-	ext3_journal_stop(handle);
+	ext4_journal_stop(handle);
 out:
 	return;
 }
@@ -3140,32 +3140,32 @@ out:
 /*
  * Bind an inode's backing buffer_head into this transaction, to prevent
  * it from being flushed to disk early.  Unlike
- * ext3_reserve_inode_write, this leaves behind no bh reference and
+ * ext4_reserve_inode_write, this leaves behind no bh reference and
  * returns no iloc structure, so the caller needs to repeat the iloc
  * lookup to mark the inode dirty later.
  */
-static int ext3_pin_inode(handle_t *handle, struct inode *inode)
+static int ext4_pin_inode(handle_t *handle, struct inode *inode)
 {
-	struct ext3_iloc iloc;
+	struct ext4_iloc iloc;
 
 	int err = 0;
 	if (handle) {
-		err = ext3_get_inode_loc(inode, &iloc);
+		err = ext4_get_inode_loc(inode, &iloc);
 		if (!err) {
 			BUFFER_TRACE(iloc.bh, "get_write_access");
 			err = journal_get_write_access(handle, iloc.bh);
 			if (!err)
-				err = ext3_journal_dirty_metadata(handle,
+				err = ext4_journal_dirty_metadata(handle,
 								  iloc.bh);
 			brelse(iloc.bh);
 		}
 	}
-	ext3_std_error(inode->i_sb, err);
+	ext4_std_error(inode->i_sb, err);
 	return err;
 }
 #endif
 
-int ext3_change_inode_journal_flag(struct inode *inode, int val)
+int ext4_change_inode_journal_flag(struct inode *inode, int val)
 {
 	journal_t *journal;
 	handle_t *handle;
@@ -3181,7 +3181,7 @@ int ext3_change_inode_journal_flag(struct inode *inode, int val)
 	 * nobody is changing anything.
 	 */
 
-	journal = EXT3_JOURNAL(inode);
+	journal = EXT4_JOURNAL(inode);
 	if (is_journal_aborted(journal) || IS_RDONLY(inode))
 		return -EROFS;
 
@@ -3197,23 +3197,23 @@ int ext3_change_inode_journal_flag(struct inode *inode, int val)
 	 */
 
 	if (val)
-		EXT3_I(inode)->i_flags |= EXT3_JOURNAL_DATA_FL;
+		EXT4_I(inode)->i_flags |= EXT4_JOURNAL_DATA_FL;
 	else
-		EXT3_I(inode)->i_flags &= ~EXT3_JOURNAL_DATA_FL;
-	ext3_set_aops(inode);
+		EXT4_I(inode)->i_flags &= ~EXT4_JOURNAL_DATA_FL;
+	ext4_set_aops(inode);
 
 	journal_unlock_updates(journal);
 
 	/* Finally we can mark the inode as dirty. */
 
-	handle = ext3_journal_start(inode, 1);
+	handle = ext4_journal_start(inode, 1);
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
 
-	err = ext3_mark_inode_dirty(handle, inode);
+	err = ext4_mark_inode_dirty(handle, inode);
 	handle->h_sync = 1;
-	ext3_journal_stop(handle);
-	ext3_std_error(inode->i_sb, err);
+	ext4_journal_stop(handle);
+	ext4_std_error(inode->i_sb, err);
 
 	return err;
 }
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 12daa68..a567af1 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -1,5 +1,5 @@
 /*
- * linux/fs/ext3/ioctl.c
+ * linux/fs/ext4/ioctl.c
  *
  * Copyright (C) 1993, 1994, 1995
  * Remy Card (card@masi.ibp.fr)
@@ -10,30 +10,30 @@
 #include <linux/fs.h>
 #include <linux/jbd.h>
 #include <linux/capability.h>
-#include <linux/ext3_fs.h>
-#include <linux/ext3_jbd.h>
+#include <linux/ext4_fs.h>
+#include <linux/ext4_jbd.h>
 #include <linux/time.h>
 #include <linux/compat.h>
 #include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 
-int ext3_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
+int ext4_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
 		unsigned long arg)
 {
-	struct ext3_inode_info *ei = EXT3_I(inode);
+	struct ext4_inode_info *ei = EXT4_I(inode);
 	unsigned int flags;
 	unsigned short rsv_window_size;
 
-	ext3_debug ("cmd = %u, arg = %lu\n", cmd, arg);
+	ext4_debug ("cmd = %u, arg = %lu\n", cmd, arg);
 
 	switch (cmd) {
-	case EXT3_IOC_GETFLAGS:
-		flags = ei->i_flags & EXT3_FL_USER_VISIBLE;
+	case EXT4_IOC_GETFLAGS:
+		flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
 		return put_user(flags, (int __user *) arg);
-	case EXT3_IOC_SETFLAGS: {
+	case EXT4_IOC_SETFLAGS: {
 		handle_t *handle = NULL;
 		int err;
-		struct ext3_iloc iloc;
+		struct ext4_iloc iloc;
 		unsigned int oldflags;
 		unsigned int jflag;
 
@@ -47,13 +47,13 @@ int ext3_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
 			return -EFAULT;
 
 		if (!S_ISDIR(inode->i_mode))
-			flags &= ~EXT3_DIRSYNC_FL;
+			flags &= ~EXT4_DIRSYNC_FL;
 
 		mutex_lock(&inode->i_mutex);
 		oldflags = ei->i_flags;
 
 		/* The JOURNAL_DATA flag is modifiable only by root */
-		jflag = flags & EXT3_JOURNAL_DATA_FL;
+		jflag = flags & EXT4_JOURNAL_DATA_FL;
 
 		/*
 		 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
@@ -61,7 +61,7 @@ int ext3_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
 		 *
 		 * This test looks nicer. Thanks to Pauline Middelink
 		 */
-		if ((flags ^ oldflags) & (EXT3_APPEND_FL | EXT3_IMMUTABLE_FL)) {
+		if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
 			if (!capable(CAP_LINUX_IMMUTABLE)) {
 				mutex_unlock(&inode->i_mutex);
 				return -EPERM;
@@ -72,7 +72,7 @@ int ext3_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
 		 * The JOURNAL_DATA flag can only be changed by
 		 * the relevant capability.
 		 */
-		if ((jflag ^ oldflags) & (EXT3_JOURNAL_DATA_FL)) {
+		if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
 			if (!capable(CAP_SYS_RESOURCE)) {
 				mutex_unlock(&inode->i_mutex);
 				return -EPERM;
@@ -80,44 +80,44 @@ int ext3_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
 		}
 
 
-		handle = ext3_journal_start(inode, 1);
+		handle = ext4_journal_start(inode, 1);
 		if (IS_ERR(handle)) {
 			mutex_unlock(&inode->i_mutex);
 			return PTR_ERR(handle);
 		}
 		if (IS_SYNC(inode))
 			handle->h_sync = 1;
-		err = ext3_reserve_inode_write(handle, inode, &iloc);
+		err = ext4_reserve_inode_write(handle, inode, &iloc);
 		if (err)
 			goto flags_err;
 
-		flags = flags & EXT3_FL_USER_MODIFIABLE;
-		flags |= oldflags & ~EXT3_FL_USER_MODIFIABLE;
+		flags = flags & EXT4_FL_USER_MODIFIABLE;
+		flags |= oldflags & ~EXT4_FL_USER_MODIFIABLE;
 		ei->i_flags = flags;
 
-		ext3_set_inode_flags(inode);
+		ext4_set_inode_flags(inode);
 		inode->i_ctime = CURRENT_TIME_SEC;
 
-		err = ext3_mark_iloc_dirty(handle, inode, &iloc);
+		err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 flags_err:
-		ext3_journal_stop(handle);
+		ext4_journal_stop(handle);
 		if (err) {
 			mutex_unlock(&inode->i_mutex);
 			return err;
 		}
 
-		if ((jflag ^ oldflags) & (EXT3_JOURNAL_DATA_FL))
-			err = ext3_change_inode_journal_flag(inode, jflag);
+		if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
+			err = ext4_change_inode_journal_flag(inode, jflag);
 		mutex_unlock(&inode->i_mutex);
 		return err;
 	}
-	case EXT3_IOC_GETVERSION:
-	case EXT3_IOC_GETVERSION_OLD:
+	case EXT4_IOC_GETVERSION:
+	case EXT4_IOC_GETVERSION_OLD:
 		return put_user(inode->i_generation, (int __user *) arg);
-	case EXT3_IOC_SETVERSION:
-	case EXT3_IOC_SETVERSION_OLD: {
+	case EXT4_IOC_SETVERSION:
+	case EXT4_IOC_SETVERSION_OLD: {
 		handle_t *handle;
-		struct ext3_iloc iloc;
+		struct ext4_iloc iloc;
 		__u32 generation;
 		int err;
 
@@ -128,20 +128,20 @@ flags_err:
 		if (get_user(generation, (int __user *) arg))
 			return -EFAULT;
 
-		handle = ext3_journal_start(inode, 1);
+		handle = ext4_journal_start(inode, 1);
 		if (IS_ERR(handle))
 			return PTR_ERR(handle);
-		err = ext3_reserve_inode_write(handle, inode, &iloc);
+		err = ext4_reserve_inode_write(handle, inode, &iloc);
 		if (err == 0) {
 			inode->i_ctime = CURRENT_TIME_SEC;
 			inode->i_generation = generation;
-			err = ext3_mark_iloc_dirty(handle, inode, &iloc);
+			err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 		}
-		ext3_journal_stop(handle);
+		ext4_journal_stop(handle);
 		return err;
 	}
 #ifdef CONFIG_JBD_DEBUG
-	case EXT3_IOC_WAIT_FOR_READONLY:
+	case EXT4_IOC_WAIT_FOR_READONLY:
 		/*
 		 * This is racy - by the time we're woken up and running,
 		 * the superblock could be released.  And the module could
@@ -155,16 +155,16 @@ flags_err:
 			int ret = 0;
 
 			set_current_state(TASK_INTERRUPTIBLE);
-			add_wait_queue(&EXT3_SB(sb)->ro_wait_queue, &wait);
-			if (timer_pending(&EXT3_SB(sb)->turn_ro_timer)) {
+			add_wait_queue(&EXT4_SB(sb)->ro_wait_queue, &wait);
+			if (timer_pending(&EXT4_SB(sb)->turn_ro_timer)) {
 				schedule();
 				ret = 1;
 			}
-			remove_wait_queue(&EXT3_SB(sb)->ro_wait_queue, &wait);
+			remove_wait_queue(&EXT4_SB(sb)->ro_wait_queue, &wait);
 			return ret;
 		}
 #endif
-	case EXT3_IOC_GETRSVSZ:
+	case EXT4_IOC_GETRSVSZ:
 		if (test_opt(inode->i_sb, RESERVATION)
 			&& S_ISREG(inode->i_mode)
 			&& ei->i_block_alloc_info) {
@@ -172,7 +172,7 @@ flags_err:
 			return put_user(rsv_window_size, (int __user *)arg);
 		}
 		return -ENOTTY;
-	case EXT3_IOC_SETRSVSZ: {
+	case EXT4_IOC_SETRSVSZ: {
 
 		if (!test_opt(inode->i_sb, RESERVATION) ||!S_ISREG(inode->i_mode))
 			return -ENOTTY;
@@ -186,8 +186,8 @@ flags_err:
 		if (get_user(rsv_window_size, (int __user *)arg))
 			return -EFAULT;
 
-		if (rsv_window_size > EXT3_MAX_RESERVE_BLOCKS)
-			rsv_window_size = EXT3_MAX_RESERVE_BLOCKS;
+		if (rsv_window_size > EXT4_MAX_RESERVE_BLOCKS)
+			rsv_window_size = EXT4_MAX_RESERVE_BLOCKS;
 
 		/*
 		 * need to allocate reservation structure for this inode
@@ -195,17 +195,17 @@ flags_err:
 		 */
 		mutex_lock(&ei->truncate_mutex);
 		if (!ei->i_block_alloc_info)
-			ext3_init_block_alloc_info(inode);
+			ext4_init_block_alloc_info(inode);
 
 		if (ei->i_block_alloc_info){
-			struct ext3_reserve_window_node *rsv = &ei->i_block_alloc_info->rsv_window_node;
+			struct ext4_reserve_window_node *rsv = &ei->i_block_alloc_info->rsv_window_node;
 			rsv->rsv_goal_size = rsv_window_size;
 		}
 		mutex_unlock(&ei->truncate_mutex);
 		return 0;
 	}
-	case EXT3_IOC_GROUP_EXTEND: {
-		ext3_fsblk_t n_blocks_count;
+	case EXT4_IOC_GROUP_EXTEND: {
+		ext4_fsblk_t n_blocks_count;
 		struct super_block *sb = inode->i_sb;
 		int err;
 
@@ -218,15 +218,15 @@ flags_err:
 		if (get_user(n_blocks_count, (__u32 __user *)arg))
 			return -EFAULT;
 
-		err = ext3_group_extend(sb, EXT3_SB(sb)->s_es, n_blocks_count);
-		journal_lock_updates(EXT3_SB(sb)->s_journal);
-		journal_flush(EXT3_SB(sb)->s_journal);
-		journal_unlock_updates(EXT3_SB(sb)->s_journal);
+		err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
+		journal_lock_updates(EXT4_SB(sb)->s_journal);
+		journal_flush(EXT4_SB(sb)->s_journal);
+		journal_unlock_updates(EXT4_SB(sb)->s_journal);
 
 		return err;
 	}
-	case EXT3_IOC_GROUP_ADD: {
-		struct ext3_new_group_data input;
+	case EXT4_IOC_GROUP_ADD: {
+		struct ext4_new_group_data input;
 		struct super_block *sb = inode->i_sb;
 		int err;
 
@@ -236,14 +236,14 @@ flags_err:
 		if (IS_RDONLY(inode))
 			return -EROFS;
 
-		if (copy_from_user(&input, (struct ext3_new_group_input __user *)arg,
+		if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
 				sizeof(input)))
 			return -EFAULT;
 
-		err = ext3_group_add(sb, &input);
-		journal_lock_updates(EXT3_SB(sb)->s_journal);
-		journal_flush(EXT3_SB(sb)->s_journal);
-		journal_unlock_updates(EXT3_SB(sb)->s_journal);
+		err = ext4_group_add(sb, &input);
+		journal_lock_updates(EXT4_SB(sb)->s_journal);
+		journal_flush(EXT4_SB(sb)->s_journal);
+		journal_unlock_updates(EXT4_SB(sb)->s_journal);
 
 		return err;
 	}
@@ -255,52 +255,52 @@ flags_err:
 }
 
 #ifdef CONFIG_COMPAT
-long ext3_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	struct inode *inode = file->f_dentry->d_inode;
 	int ret;
 
 	/* These are just misnamed, they actually get/put from/to user an int */
 	switch (cmd) {
-	case EXT3_IOC32_GETFLAGS:
-		cmd = EXT3_IOC_GETFLAGS;
+	case EXT4_IOC32_GETFLAGS:
+		cmd = EXT4_IOC_GETFLAGS;
 		break;
-	case EXT3_IOC32_SETFLAGS:
-		cmd = EXT3_IOC_SETFLAGS;
+	case EXT4_IOC32_SETFLAGS:
+		cmd = EXT4_IOC_SETFLAGS;
 		break;
-	case EXT3_IOC32_GETVERSION:
-		cmd = EXT3_IOC_GETVERSION;
+	case EXT4_IOC32_GETVERSION:
+		cmd = EXT4_IOC_GETVERSION;
 		break;
-	case EXT3_IOC32_SETVERSION:
-		cmd = EXT3_IOC_SETVERSION;
+	case EXT4_IOC32_SETVERSION:
+		cmd = EXT4_IOC_SETVERSION;
 		break;
-	case EXT3_IOC32_GROUP_EXTEND:
-		cmd = EXT3_IOC_GROUP_EXTEND;
+	case EXT4_IOC32_GROUP_EXTEND:
+		cmd = EXT4_IOC_GROUP_EXTEND;
 		break;
-	case EXT3_IOC32_GETVERSION_OLD:
-		cmd = EXT3_IOC_GETVERSION_OLD;
+	case EXT4_IOC32_GETVERSION_OLD:
+		cmd = EXT4_IOC_GETVERSION_OLD;
 		break;
-	case EXT3_IOC32_SETVERSION_OLD:
-		cmd = EXT3_IOC_SETVERSION_OLD;
+	case EXT4_IOC32_SETVERSION_OLD:
+		cmd = EXT4_IOC_SETVERSION_OLD;
 		break;
 #ifdef CONFIG_JBD_DEBUG
-	case EXT3_IOC32_WAIT_FOR_READONLY:
-		cmd = EXT3_IOC_WAIT_FOR_READONLY;
+	case EXT4_IOC32_WAIT_FOR_READONLY:
+		cmd = EXT4_IOC_WAIT_FOR_READONLY;
 		break;
 #endif
-	case EXT3_IOC32_GETRSVSZ:
-		cmd = EXT3_IOC_GETRSVSZ;
+	case EXT4_IOC32_GETRSVSZ:
+		cmd = EXT4_IOC_GETRSVSZ;
 		break;
-	case EXT3_IOC32_SETRSVSZ:
-		cmd = EXT3_IOC_SETRSVSZ;
+	case EXT4_IOC32_SETRSVSZ:
+		cmd = EXT4_IOC_SETRSVSZ;
 		break;
-	case EXT3_IOC_GROUP_ADD:
+	case EXT4_IOC_GROUP_ADD:
 		break;
 	default:
 		return -ENOIOCTLCMD;
 	}
 	lock_kernel();
-	ret = ext3_ioctl(inode, file, cmd, (unsigned long) compat_ptr(arg));
+	ret = ext4_ioctl(inode, file, cmd, (unsigned long) compat_ptr(arg));
 	unlock_kernel();
 	return ret;
 }
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 906731a..956b381 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1,5 +1,5 @@
 /*
- *  linux/fs/ext3/namei.c
+ *  linux/fs/ext4/namei.c
  *
  * Copyright (C) 1992, 1993, 1994, 1995
  * Remy Card (card@masi.ibp.fr)
@@ -28,8 +28,8 @@
 #include <linux/pagemap.h>
 #include <linux/jbd.h>
 #include <linux/time.h>
-#include <linux/ext3_fs.h>
-#include <linux/ext3_jbd.h>
+#include <linux/ext4_fs.h>
+#include <linux/ext4_jbd.h>
 #include <linux/fcntl.h>
 #include <linux/stat.h>
 #include <linux/string.h>
@@ -50,7 +50,7 @@
 #define NAMEI_RA_SIZE        (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS)
 #define NAMEI_RA_INDEX(c,b)  (((c) * NAMEI_RA_BLOCKS) + (b))
 
-static struct buffer_head *ext3_append(handle_t *handle,
+static struct buffer_head *ext4_append(handle_t *handle,
 					struct inode *inode,
 					u32 *block, int *err)
 {
@@ -58,10 +58,10 @@ static struct buffer_head *ext3_append(handle_t *handle,
 
 	*block = inode->i_size >> inode->i_sb->s_blocksize_bits;
 
-	if ((bh = ext3_bread(handle, inode, *block, 1, err))) {
+	if ((bh = ext4_bread(handle, inode, *block, 1, err))) {
 		inode->i_size += inode->i_sb->s_blocksize;
-		EXT3_I(inode)->i_disksize = inode->i_size;
-		ext3_journal_get_write_access(handle,bh);
+		EXT4_I(inode)->i_disksize = inode->i_size;
+		ext4_journal_get_write_access(handle,bh);
 	}
 	return bh;
 }
@@ -144,7 +144,7 @@ struct dx_map_entry
 	u32 offs;
 };
 
-#ifdef CONFIG_EXT3_INDEX
+#ifdef CONFIG_EXT4_INDEX
 static inline unsigned dx_get_block (struct dx_entry *entry);
 static void dx_set_block (struct dx_entry *entry, unsigned value);
 static inline unsigned dx_get_hash (struct dx_entry *entry);
@@ -161,20 +161,20 @@ static struct dx_frame *dx_probe(struct dentry *dentry,
 				 struct dx_frame *frame,
 				 int *err);
 static void dx_release (struct dx_frame *frames);
-static int dx_make_map (struct ext3_dir_entry_2 *de, int size,
+static int dx_make_map (struct ext4_dir_entry_2 *de, int size,
 			struct dx_hash_info *hinfo, struct dx_map_entry map[]);
 static void dx_sort_map(struct dx_map_entry *map, unsigned count);
-static struct ext3_dir_entry_2 *dx_move_dirents (char *from, char *to,
+static struct ext4_dir_entry_2 *dx_move_dirents (char *from, char *to,
 		struct dx_map_entry *offsets, int count);
-static struct ext3_dir_entry_2* dx_pack_dirents (char *base, int size);
+static struct ext4_dir_entry_2* dx_pack_dirents (char *base, int size);
 static void dx_insert_block (struct dx_frame *frame, u32 hash, u32 block);
-static int ext3_htree_next_block(struct inode *dir, __u32 hash,
+static int ext4_htree_next_block(struct inode *dir, __u32 hash,
 				 struct dx_frame *frame,
 				 struct dx_frame *frames,
 				 __u32 *start_hash);
-static struct buffer_head * ext3_dx_find_entry(struct dentry *dentry,
-		       struct ext3_dir_entry_2 **res_dir, int *err);
-static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
+static struct buffer_head * ext4_dx_find_entry(struct dentry *dentry,
+		       struct ext4_dir_entry_2 **res_dir, int *err);
+static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
 			     struct inode *inode);
 
 /*
@@ -224,14 +224,14 @@ static inline void dx_set_limit (struct dx_entry *entries, unsigned value)
 
 static inline unsigned dx_root_limit (struct inode *dir, unsigned infosize)
 {
-	unsigned entry_space = dir->i_sb->s_blocksize - EXT3_DIR_REC_LEN(1) -
-		EXT3_DIR_REC_LEN(2) - infosize;
+	unsigned entry_space = dir->i_sb->s_blocksize - EXT4_DIR_REC_LEN(1) -
+		EXT4_DIR_REC_LEN(2) - infosize;
 	return 0? 20: entry_space / sizeof(struct dx_entry);
 }
 
 static inline unsigned dx_node_limit (struct inode *dir)
 {
-	unsigned entry_space = dir->i_sb->s_blocksize - EXT3_DIR_REC_LEN(0);
+	unsigned entry_space = dir->i_sb->s_blocksize - EXT4_DIR_REC_LEN(0);
 	return 0? 22: entry_space / sizeof(struct dx_entry);
 }
 
@@ -257,7 +257,7 @@ struct stats
 	unsigned bcount;
 };
 
-static struct stats dx_show_leaf(struct dx_hash_info *hinfo, struct ext3_dir_entry_2 *de,
+static struct stats dx_show_leaf(struct dx_hash_info *hinfo, struct ext4_dir_entry_2 *de,
 				 int size, int show_names)
 {
 	unsigned names = 0, space = 0;
@@ -274,14 +274,14 @@ static struct stats dx_show_leaf(struct dx_hash_info *hinfo, struct ext3_dir_ent
 				int len = de->name_len;
 				char *name = de->name;
 				while (len--) printk("%c", *name++);
-				ext3fs_dirhash(de->name, de->name_len, &h);
+				ext4fs_dirhash(de->name, de->name_len, &h);
 				printk(":%x.%u ", h.hash,
 				       ((char *) de - base));
 			}
-			space += EXT3_DIR_REC_LEN(de->name_len);
+			space += EXT4_DIR_REC_LEN(de->name_len);
 			names++;
 		}
-		de = (struct ext3_dir_entry_2 *) ((char *) de + le16_to_cpu(de->rec_len));
+		de = (struct ext4_dir_entry_2 *) ((char *) de + le16_to_cpu(de->rec_len));
 	}
 	printk("(%i)\n", names);
 	return (struct stats) { names, space, 1 };
@@ -302,10 +302,10 @@ struct stats dx_show_entries(struct dx_hash_info *hinfo, struct inode *dir,
 		u32 range = i < count - 1? (dx_get_hash(entries + 1) - hash): ~hash;
 		struct stats stats;
 		printk("%s%3u:%03u hash %8x/%8x ",levels?"":"   ", i, block, hash, range);
-		if (!(bh = ext3_bread (NULL,dir, block, 0,&err))) continue;
+		if (!(bh = ext4_bread (NULL,dir, block, 0,&err))) continue;
 		stats = levels?
 		   dx_show_entries(hinfo, dir, ((struct dx_node *) bh->b_data)->entries, levels - 1):
-		   dx_show_leaf(hinfo, (struct ext3_dir_entry_2 *) bh->b_data, blocksize, 0);
+		   dx_show_leaf(hinfo, (struct ext4_dir_entry_2 *) bh->b_data, blocksize, 0);
 		names += stats.names;
 		space += stats.space;
 		bcount += stats.bcount;
@@ -341,13 +341,13 @@ dx_probe(struct dentry *dentry, struct inode *dir,
 	frame->bh = NULL;
 	if (dentry)
 		dir = dentry->d_parent->d_inode;
-	if (!(bh = ext3_bread (NULL,dir, 0, 0, err)))
+	if (!(bh = ext4_bread (NULL,dir, 0, 0, err)))
 		goto fail;
 	root = (struct dx_root *) bh->b_data;
 	if (root->info.hash_version != DX_HASH_TEA &&
 	    root->info.hash_version != DX_HASH_HALF_MD4 &&
 	    root->info.hash_version != DX_HASH_LEGACY) {
-		ext3_warning(dir->i_sb, __FUNCTION__,
+		ext4_warning(dir->i_sb, __FUNCTION__,
 			     "Unrecognised inode hash code %d",
 			     root->info.hash_version);
 		brelse(bh);
@@ -355,13 +355,13 @@ dx_probe(struct dentry *dentry, struct inode *dir,
 		goto fail;
 	}
 	hinfo->hash_version = root->info.hash_version;
-	hinfo->seed = EXT3_SB(dir->i_sb)->s_hash_seed;
+	hinfo->seed = EXT4_SB(dir->i_sb)->s_hash_seed;
 	if (dentry)
-		ext3fs_dirhash(dentry->d_name.name, dentry->d_name.len, hinfo);
+		ext4fs_dirhash(dentry->d_name.name, dentry->d_name.len, hinfo);
 	hash = hinfo->hash;
 
 	if (root->info.unused_flags & 1) {
-		ext3_warning(dir->i_sb, __FUNCTION__,
+		ext4_warning(dir->i_sb, __FUNCTION__,
 			     "Unimplemented inode hash flags: %#06x",
 			     root->info.unused_flags);
 		brelse(bh);
@@ -370,7 +370,7 @@ dx_probe(struct dentry *dentry, struct inode *dir,
 	}
 
 	if ((indirect = root->info.indirect_levels) > 1) {
-		ext3_warning(dir->i_sb, __FUNCTION__,
+		ext4_warning(dir->i_sb, __FUNCTION__,
 			     "Unimplemented inode hash depth: %#06x",
 			     root->info.indirect_levels);
 		brelse(bh);
@@ -421,7 +421,7 @@ dx_probe(struct dentry *dentry, struct inode *dir,
 		frame->entries = entries;
 		frame->at = at;
 		if (!indirect--) return frame;
-		if (!(bh = ext3_bread (NULL,dir, dx_get_block(at), 0, err)))
+		if (!(bh = ext4_bread (NULL,dir, dx_get_block(at), 0, err)))
 			goto fail2;
 		at = entries = ((struct dx_node *) bh->b_data)->entries;
 		assert (dx_get_limit(entries) == dx_node_limit (dir));
@@ -463,7 +463,7 @@ static void dx_release (struct dx_frame *frames)
  * If start_hash is non-null, it will be filled in with the starting
  * hash of the next page.
  */
-static int ext3_htree_next_block(struct inode *dir, __u32 hash,
+static int ext4_htree_next_block(struct inode *dir, __u32 hash,
 				 struct dx_frame *frame,
 				 struct dx_frame *frames,
 				 __u32 *start_hash)
@@ -509,7 +509,7 @@ static int ext3_htree_next_block(struct inode *dir, __u32 hash,
 	 * block so no check is necessary
 	 */
 	while (num_frames--) {
-		if (!(bh = ext3_bread(NULL, dir, dx_get_block(p->at),
+		if (!(bh = ext4_bread(NULL, dir, dx_get_block(p->at),
 				      0, &err)))
 			return err; /* Failure */
 		p++;
@@ -524,9 +524,9 @@ static int ext3_htree_next_block(struct inode *dir, __u32 hash,
 /*
  * p is at least 6 bytes before the end of page
  */
-static inline struct ext3_dir_entry_2 *ext3_next_entry(struct ext3_dir_entry_2 *p)
+static inline struct ext4_dir_entry_2 *ext4_next_entry(struct ext4_dir_entry_2 *p)
 {
-	return (struct ext3_dir_entry_2 *)((char*)p + le16_to_cpu(p->rec_len));
+	return (struct ext4_dir_entry_2 *)((char*)p + le16_to_cpu(p->rec_len));
 }
 
 /*
@@ -540,26 +540,26 @@ static int htree_dirblock_to_tree(struct file *dir_file,
 				  __u32 start_hash, __u32 start_minor_hash)
 {
 	struct buffer_head *bh;
-	struct ext3_dir_entry_2 *de, *top;
+	struct ext4_dir_entry_2 *de, *top;
 	int err, count = 0;
 
 	dxtrace(printk("In htree dirblock_to_tree: block %d\n", block));
-	if (!(bh = ext3_bread (NULL, dir, block, 0, &err)))
+	if (!(bh = ext4_bread (NULL, dir, block, 0, &err)))
 		return err;
 
-	de = (struct ext3_dir_entry_2 *) bh->b_data;
-	top = (struct ext3_dir_entry_2 *) ((char *) de +
+	de = (struct ext4_dir_entry_2 *) bh->b_data;
+	top = (struct ext4_dir_entry_2 *) ((char *) de +
 					   dir->i_sb->s_blocksize -
-					   EXT3_DIR_REC_LEN(0));
-	for (; de < top; de = ext3_next_entry(de)) {
-		ext3fs_dirhash(de->name, de->name_len, hinfo);
+					   EXT4_DIR_REC_LEN(0));
+	for (; de < top; de = ext4_next_entry(de)) {
+		ext4fs_dirhash(de->name, de->name_len, hinfo);
 		if ((hinfo->hash < start_hash) ||
 		    ((hinfo->hash == start_hash) &&
 		     (hinfo->minor_hash < start_minor_hash)))
 			continue;
 		if (de->inode == 0)
 			continue;
-		if ((err = ext3_htree_store_dirent(dir_file,
+		if ((err = ext4_htree_store_dirent(dir_file,
 				   hinfo->hash, hinfo->minor_hash, de)) != 0) {
 			brelse(bh);
 			return err;
@@ -579,11 +579,11 @@ static int htree_dirblock_to_tree(struct file *dir_file,
  * This function returns the number of entries inserted into the tree,
  * or a negative error code.
  */
-int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
+int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
 			 __u32 start_minor_hash, __u32 *next_hash)
 {
 	struct dx_hash_info hinfo;
-	struct ext3_dir_entry_2 *de;
+	struct ext4_dir_entry_2 *de;
 	struct dx_frame frames[2], *frame;
 	struct inode *dir;
 	int block, err;
@@ -594,9 +594,9 @@ int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
 	dxtrace(printk("In htree_fill_tree, start hash: %x:%x\n", start_hash,
 		       start_minor_hash));
 	dir = dir_file->f_dentry->d_inode;
-	if (!(EXT3_I(dir)->i_flags & EXT3_INDEX_FL)) {
-		hinfo.hash_version = EXT3_SB(dir->i_sb)->s_def_hash_version;
-		hinfo.seed = EXT3_SB(dir->i_sb)->s_hash_seed;
+	if (!(EXT4_I(dir)->i_flags & EXT4_INDEX_FL)) {
+		hinfo.hash_version = EXT4_SB(dir->i_sb)->s_def_hash_version;
+		hinfo.seed = EXT4_SB(dir->i_sb)->s_hash_seed;
 		count = htree_dirblock_to_tree(dir_file, dir, 0, &hinfo,
 					       start_hash, start_minor_hash);
 		*next_hash = ~0;
@@ -610,15 +610,15 @@ int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
 
 	/* Add '.' and '..' from the htree header */
 	if (!start_hash && !start_minor_hash) {
-		de = (struct ext3_dir_entry_2 *) frames[0].bh->b_data;
-		if ((err = ext3_htree_store_dirent(dir_file, 0, 0, de)) != 0)
+		de = (struct ext4_dir_entry_2 *) frames[0].bh->b_data;
+		if ((err = ext4_htree_store_dirent(dir_file, 0, 0, de)) != 0)
 			goto errout;
 		count++;
 	}
 	if (start_hash < 2 || (start_hash ==2 && start_minor_hash==0)) {
-		de = (struct ext3_dir_entry_2 *) frames[0].bh->b_data;
-		de = ext3_next_entry(de);
-		if ((err = ext3_htree_store_dirent(dir_file, 2, 0, de)) != 0)
+		de = (struct ext4_dir_entry_2 *) frames[0].bh->b_data;
+		de = ext4_next_entry(de);
+		if ((err = ext4_htree_store_dirent(dir_file, 2, 0, de)) != 0)
 			goto errout;
 		count++;
 	}
@@ -633,7 +633,7 @@ int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
 		}
 		count += ret;
 		hashval = ~0;
-		ret = ext3_htree_next_block(dir, HASH_NB_ALWAYS,
+		ret = ext4_htree_next_block(dir, HASH_NB_ALWAYS,
 					    frame, frames, &hashval);
 		*next_hash = hashval;
 		if (ret < 0) {
@@ -663,7 +663,7 @@ errout:
  * Directory block splitting, compacting
  */
 
-static int dx_make_map (struct ext3_dir_entry_2 *de, int size,
+static int dx_make_map (struct ext4_dir_entry_2 *de, int size,
 			struct dx_hash_info *hinfo, struct dx_map_entry *map_tail)
 {
 	int count = 0;
@@ -673,7 +673,7 @@ static int dx_make_map (struct ext3_dir_entry_2 *de, int size,
 	while ((char *) de < base + size)
 	{
 		if (de->name_len && de->inode) {
-			ext3fs_dirhash(de->name, de->name_len, &h);
+			ext4fs_dirhash(de->name, de->name_len, &h);
 			map_tail--;
 			map_tail->hash = h.hash;
 			map_tail->offs = (u32) ((char *) de - base);
@@ -681,7 +681,7 @@ static int dx_make_map (struct ext3_dir_entry_2 *de, int size,
 			cond_resched();
 		}
 		/* XXX: do we need to check rec_len == 0 case? -Chris */
-		de = (struct ext3_dir_entry_2 *) ((char *) de + le16_to_cpu(de->rec_len));
+		de = (struct ext4_dir_entry_2 *) ((char *) de + le16_to_cpu(de->rec_len));
 	}
 	return count;
 }
@@ -730,21 +730,21 @@ static void dx_insert_block(struct dx_frame *frame, u32 hash, u32 block)
 #endif
 
 
-static void ext3_update_dx_flag(struct inode *inode)
+static void ext4_update_dx_flag(struct inode *inode)
 {
-	if (!EXT3_HAS_COMPAT_FEATURE(inode->i_sb,
-				     EXT3_FEATURE_COMPAT_DIR_INDEX))
-		EXT3_I(inode)->i_flags &= ~EXT3_INDEX_FL;
+	if (!EXT4_HAS_COMPAT_FEATURE(inode->i_sb,
+				     EXT4_FEATURE_COMPAT_DIR_INDEX))
+		EXT4_I(inode)->i_flags &= ~EXT4_INDEX_FL;
 }
 
 /*
- * NOTE! unlike strncmp, ext3_match returns 1 for success, 0 for failure.
+ * NOTE! unlike strncmp, ext4_match returns 1 for success, 0 for failure.
  *
- * `len <= EXT3_NAME_LEN' is guaranteed by caller.
+ * `len <= EXT4_NAME_LEN' is guaranteed by caller.
  * `de != NULL' is guaranteed by caller.
  */
-static inline int ext3_match (int len, const char * const name,
-			      struct ext3_dir_entry_2 * de)
+static inline int ext4_match (int len, const char * const name,
+			      struct ext4_dir_entry_2 * de)
 {
 	if (len != de->name_len)
 		return 0;
@@ -760,24 +760,24 @@ static inline int search_dirblock(struct buffer_head * bh,
 				  struct inode *dir,
 				  struct dentry *dentry,
 				  unsigned long offset,
-				  struct ext3_dir_entry_2 ** res_dir)
+				  struct ext4_dir_entry_2 ** res_dir)
 {
-	struct ext3_dir_entry_2 * de;
+	struct ext4_dir_entry_2 * de;
 	char * dlimit;
 	int de_len;
 	const char *name = dentry->d_name.name;
 	int namelen = dentry->d_name.len;
 
-	de = (struct ext3_dir_entry_2 *) bh->b_data;
+	de = (struct ext4_dir_entry_2 *) bh->b_data;
 	dlimit = bh->b_data + dir->i_sb->s_blocksize;
 	while ((char *) de < dlimit) {
 		/* this code is executed quadratically often */
 		/* do minimal checking `by hand' */
 
 		if ((char *) de + namelen <= dlimit &&
-		    ext3_match (namelen, name, de)) {
+		    ext4_match (namelen, name, de)) {
 			/* found a match - just to be sure, do a full check */
-			if (!ext3_check_dir_entry("ext3_find_entry",
+			if (!ext4_check_dir_entry("ext4_find_entry",
 						  dir, de, bh, offset))
 				return -1;
 			*res_dir = de;
@@ -788,14 +788,14 @@ static inline int search_dirblock(struct buffer_head * bh,
 		if (de_len <= 0)
 			return -1;
 		offset += de_len;
-		de = (struct ext3_dir_entry_2 *) ((char *) de + de_len);
+		de = (struct ext4_dir_entry_2 *) ((char *) de + de_len);
 	}
 	return 0;
 }
 
 
 /*
- *	ext3_find_entry()
+ *	ext4_find_entry()
  *
  * finds an entry in the specified directory with the wanted name. It
  * returns the cache buffer in which the entry was found, and the entry
@@ -805,8 +805,8 @@ static inline int search_dirblock(struct buffer_head * bh,
  * The returned buffer_head has ->b_count elevated.  The caller is expected
  * to brelse() it when appropriate.
  */
-static struct buffer_head * ext3_find_entry (struct dentry *dentry,
-					struct ext3_dir_entry_2 ** res_dir)
+static struct buffer_head * ext4_find_entry (struct dentry *dentry,
+					struct ext4_dir_entry_2 ** res_dir)
 {
 	struct super_block * sb;
 	struct buffer_head * bh_use[NAMEI_RA_SIZE];
@@ -828,11 +828,11 @@ static struct buffer_head * ext3_find_entry (struct dentry *dentry,
 	blocksize = sb->s_blocksize;
 	namelen = dentry->d_name.len;
 	name = dentry->d_name.name;
-	if (namelen > EXT3_NAME_LEN)
+	if (namelen > EXT4_NAME_LEN)
 		return NULL;
-#ifdef CONFIG_EXT3_INDEX
+#ifdef CONFIG_EXT4_INDEX
 	if (is_dx(dir)) {
-		bh = ext3_dx_find_entry(dentry, res_dir, &err);
+		bh = ext4_dx_find_entry(dentry, res_dir, &err);
 		/*
 		 * On success, or if the error was file not found,
 		 * return.  Otherwise, fall back to doing a search the
@@ -840,11 +840,11 @@ static struct buffer_head * ext3_find_entry (struct dentry *dentry,
 		 */
 		if (bh || (err != ERR_BAD_DX_DIR))
 			return bh;
-		dxtrace(printk("ext3_find_entry: dx failed, falling back\n"));
+		dxtrace(printk("ext4_find_entry: dx failed, falling back\n"));
 	}
 #endif
-	nblocks = dir->i_size >> EXT3_BLOCK_SIZE_BITS(sb);
-	start = EXT3_I(dir)->i_dir_start_lookup;
+	nblocks = dir->i_size >> EXT4_BLOCK_SIZE_BITS(sb);
+	start = EXT4_I(dir)->i_dir_start_lookup;
 	if (start >= nblocks)
 		start = 0;
 	block = start;
@@ -868,7 +868,7 @@ restart:
 					break;
 				}
 				num++;
-				bh = ext3_getblk(NULL, dir, b++, 0, &err);
+				bh = ext4_getblk(NULL, dir, b++, 0, &err);
 				bh_use[ra_max] = bh;
 				if (bh)
 					ll_rw_block(READ_META, 1, &bh);
@@ -879,15 +879,15 @@ restart:
 		wait_on_buffer(bh);
 		if (!buffer_uptodate(bh)) {
 			/* read error, skip block & hope for the best */
-			ext3_error(sb, __FUNCTION__, "reading directory #%lu "
+			ext4_error(sb, __FUNCTION__, "reading directory #%lu "
 				   "offset %lu", dir->i_ino, block);
 			brelse(bh);
 			goto next;
 		}
 		i = search_dirblock(bh, dir, dentry,
-			    block << EXT3_BLOCK_SIZE_BITS(sb), res_dir);
+			    block << EXT4_BLOCK_SIZE_BITS(sb), res_dir);
 		if (i == 1) {
-			EXT3_I(dir)->i_dir_start_lookup = block;
+			EXT4_I(dir)->i_dir_start_lookup = block;
 			ret = bh;
 			goto cleanup_and_exit;
 		} else {
@@ -905,7 +905,7 @@ restart:
 	 * search the last part of the directory before giving up.
 	 */
 	block = nblocks;
-	nblocks = dir->i_size >> EXT3_BLOCK_SIZE_BITS(sb);
+	nblocks = dir->i_size >> EXT4_BLOCK_SIZE_BITS(sb);
 	if (block < nblocks) {
 		start = 0;
 		goto restart;
@@ -918,15 +918,15 @@ cleanup_and_exit:
 	return ret;
 }
 
-#ifdef CONFIG_EXT3_INDEX
-static struct buffer_head * ext3_dx_find_entry(struct dentry *dentry,
-		       struct ext3_dir_entry_2 **res_dir, int *err)
+#ifdef CONFIG_EXT4_INDEX
+static struct buffer_head * ext4_dx_find_entry(struct dentry *dentry,
+		       struct ext4_dir_entry_2 **res_dir, int *err)
 {
 	struct super_block * sb;
 	struct dx_hash_info	hinfo;
 	u32 hash;
 	struct dx_frame frames[2], *frame;
-	struct ext3_dir_entry_2 *de, *top;
+	struct ext4_dir_entry_2 *de, *top;
 	struct buffer_head *bh;
 	unsigned long block;
 	int retval;
@@ -948,16 +948,16 @@ static struct buffer_head * ext3_dx_find_entry(struct dentry *dentry,
 	hash = hinfo.hash;
 	do {
 		block = dx_get_block(frame->at);
-		if (!(bh = ext3_bread (NULL,dir, block, 0, err)))
+		if (!(bh = ext4_bread (NULL,dir, block, 0, err)))
 			goto errout;
-		de = (struct ext3_dir_entry_2 *) bh->b_data;
-		top = (struct ext3_dir_entry_2 *) ((char *) de + sb->s_blocksize -
-				       EXT3_DIR_REC_LEN(0));
-		for (; de < top; de = ext3_next_entry(de))
-		if (ext3_match (namelen, name, de)) {
-			if (!ext3_check_dir_entry("ext3_find_entry",
+		de = (struct ext4_dir_entry_2 *) bh->b_data;
+		top = (struct ext4_dir_entry_2 *) ((char *) de + sb->s_blocksize -
+				       EXT4_DIR_REC_LEN(0));
+		for (; de < top; de = ext4_next_entry(de))
+		if (ext4_match (namelen, name, de)) {
+			if (!ext4_check_dir_entry("ext4_find_entry",
 						  dir, de, bh,
-				  (block<<EXT3_BLOCK_SIZE_BITS(sb))
+				  (block<<EXT4_BLOCK_SIZE_BITS(sb))
 					  +((char *)de - bh->b_data))) {
 				brelse (bh);
 				goto errout;
@@ -968,10 +968,10 @@ static struct buffer_head * ext3_dx_find_entry(struct dentry *dentry,
 		}
 		brelse (bh);
 		/* Check to see if we should continue to search */
-		retval = ext3_htree_next_block(dir, hash, frame,
+		retval = ext4_htree_next_block(dir, hash, frame,
 					       frames, NULL);
 		if (retval < 0) {
-			ext3_warning(sb, __FUNCTION__,
+			ext4_warning(sb, __FUNCTION__,
 			     "error reading index page in directory #%lu",
 			     dir->i_ino);
 			*err = retval;
@@ -987,22 +987,22 @@ errout:
 }
 #endif
 
-static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *ext4_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
 {
 	struct inode * inode;
-	struct ext3_dir_entry_2 * de;
+	struct ext4_dir_entry_2 * de;
 	struct buffer_head * bh;
 
-	if (dentry->d_name.len > EXT3_NAME_LEN)
+	if (dentry->d_name.len > EXT4_NAME_LEN)
 		return ERR_PTR(-ENAMETOOLONG);
 
-	bh = ext3_find_entry(dentry, &de);
+	bh = ext4_find_entry(dentry, &de);
 	inode = NULL;
 	if (bh) {
 		unsigned long ino = le32_to_cpu(de->inode);
 		brelse (bh);
-		if (!ext3_valid_inum(dir->i_sb, ino)) {
-			ext3_error(dir->i_sb, "ext3_lookup",
+		if (!ext4_valid_inum(dir->i_sb, ino)) {
+			ext4_error(dir->i_sb, "ext4_lookup",
 				   "bad inode number: %lu", ino);
 			inode = NULL;
 		} else
@@ -1015,28 +1015,28 @@ static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, str
 }
 
 
-struct dentry *ext3_get_parent(struct dentry *child)
+struct dentry *ext4_get_parent(struct dentry *child)
 {
 	unsigned long ino;
 	struct dentry *parent;
 	struct inode *inode;
 	struct dentry dotdot;
-	struct ext3_dir_entry_2 * de;
+	struct ext4_dir_entry_2 * de;
 	struct buffer_head *bh;
 
 	dotdot.d_name.name = "..";
 	dotdot.d_name.len = 2;
 	dotdot.d_parent = child; /* confusing, isn't it! */
 
-	bh = ext3_find_entry(&dotdot, &de);
+	bh = ext4_find_entry(&dotdot, &de);
 	inode = NULL;
 	if (!bh)
 		return ERR_PTR(-ENOENT);
 	ino = le32_to_cpu(de->inode);
 	brelse(bh);
 
-	if (!ext3_valid_inum(child->d_inode->i_sb, ino)) {
-		ext3_error(child->d_inode->i_sb, "ext3_get_parent",
+	if (!ext4_valid_inum(child->d_inode->i_sb, ino)) {
+		ext4_error(child->d_inode->i_sb, "ext4_get_parent",
 			   "bad inode number: %lu", ino);
 		inode = NULL;
 	} else
@@ -1054,65 +1054,65 @@ struct dentry *ext3_get_parent(struct dentry *child)
 }
 
 #define S_SHIFT 12
-static unsigned char ext3_type_by_mode[S_IFMT >> S_SHIFT] = {
-	[S_IFREG >> S_SHIFT]	= EXT3_FT_REG_FILE,
-	[S_IFDIR >> S_SHIFT]	= EXT3_FT_DIR,
-	[S_IFCHR >> S_SHIFT]	= EXT3_FT_CHRDEV,
-	[S_IFBLK >> S_SHIFT]	= EXT3_FT_BLKDEV,
-	[S_IFIFO >> S_SHIFT]	= EXT3_FT_FIFO,
-	[S_IFSOCK >> S_SHIFT]	= EXT3_FT_SOCK,
-	[S_IFLNK >> S_SHIFT]	= EXT3_FT_SYMLINK,
+static unsigned char ext4_type_by_mode[S_IFMT >> S_SHIFT] = {
+	[S_IFREG >> S_SHIFT]	= EXT4_FT_REG_FILE,
+	[S_IFDIR >> S_SHIFT]	= EXT4_FT_DIR,
+	[S_IFCHR >> S_SHIFT]	= EXT4_FT_CHRDEV,
+	[S_IFBLK >> S_SHIFT]	= EXT4_FT_BLKDEV,
+	[S_IFIFO >> S_SHIFT]	= EXT4_FT_FIFO,
+	[S_IFSOCK >> S_SHIFT]	= EXT4_FT_SOCK,
+	[S_IFLNK >> S_SHIFT]	= EXT4_FT_SYMLINK,
 };
 
-static inline void ext3_set_de_type(struct super_block *sb,
-				struct ext3_dir_entry_2 *de,
+static inline void ext4_set_de_type(struct super_block *sb,
+				struct ext4_dir_entry_2 *de,
 				umode_t mode) {
-	if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_FILETYPE))
-		de->file_type = ext3_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
+	if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE))
+		de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
 }
 
-#ifdef CONFIG_EXT3_INDEX
-static struct ext3_dir_entry_2 *
+#ifdef CONFIG_EXT4_INDEX
+static struct ext4_dir_entry_2 *
 dx_move_dirents(char *from, char *to, struct dx_map_entry *map, int count)
 {
 	unsigned rec_len = 0;
 
 	while (count--) {
-		struct ext3_dir_entry_2 *de = (struct ext3_dir_entry_2 *) (from + map->offs);
-		rec_len = EXT3_DIR_REC_LEN(de->name_len);
+		struct ext4_dir_entry_2 *de = (struct ext4_dir_entry_2 *) (from + map->offs);
+		rec_len = EXT4_DIR_REC_LEN(de->name_len);
 		memcpy (to, de, rec_len);
-		((struct ext3_dir_entry_2 *) to)->rec_len =
+		((struct ext4_dir_entry_2 *) to)->rec_len =
 				cpu_to_le16(rec_len);
 		de->inode = 0;
 		map++;
 		to += rec_len;
 	}
-	return (struct ext3_dir_entry_2 *) (to - rec_len);
+	return (struct ext4_dir_entry_2 *) (to - rec_len);
 }
 
-static struct ext3_dir_entry_2* dx_pack_dirents(char *base, int size)
+static struct ext4_dir_entry_2* dx_pack_dirents(char *base, int size)
 {
-	struct ext3_dir_entry_2 *next, *to, *prev, *de = (struct ext3_dir_entry_2 *) base;
+	struct ext4_dir_entry_2 *next, *to, *prev, *de = (struct ext4_dir_entry_2 *) base;
 	unsigned rec_len = 0;
 
 	prev = to = de;
 	while ((char*)de < base + size) {
-		next = (struct ext3_dir_entry_2 *) ((char *) de +
+		next = (struct ext4_dir_entry_2 *) ((char *) de +
 						    le16_to_cpu(de->rec_len));
 		if (de->inode && de->name_len) {
-			rec_len = EXT3_DIR_REC_LEN(de->name_len);
+			rec_len = EXT4_DIR_REC_LEN(de->name_len);
 			if (de > to)
 				memmove(to, de, rec_len);
 			to->rec_len = cpu_to_le16(rec_len);
 			prev = to;
-			to = (struct ext3_dir_entry_2 *) (((char *) to) + rec_len);
+			to = (struct ext4_dir_entry_2 *) (((char *) to) + rec_len);
 		}
 		de = next;
 	}
 	return prev;
 }
 
-static struct ext3_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
+static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
 			struct buffer_head **bh,struct dx_frame *frame,
 			struct dx_hash_info *hinfo, int *error)
 {
@@ -1124,10 +1124,10 @@ static struct ext3_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
 	struct dx_map_entry *map;
 	char *data1 = (*bh)->b_data, *data2;
 	unsigned split;
-	struct ext3_dir_entry_2 *de = NULL, *de2;
+	struct ext4_dir_entry_2 *de = NULL, *de2;
 	int	err;
 
-	bh2 = ext3_append (handle, dir, &newblock, error);
+	bh2 = ext4_append (handle, dir, &newblock, error);
 	if (!(bh2)) {
 		brelse(*bh);
 		*bh = NULL;
@@ -1135,17 +1135,17 @@ static struct ext3_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
 	}
 
 	BUFFER_TRACE(*bh, "get_write_access");
-	err = ext3_journal_get_write_access(handle, *bh);
+	err = ext4_journal_get_write_access(handle, *bh);
 	if (err) {
 	journal_error:
 		brelse(*bh);
 		brelse(bh2);
 		*bh = NULL;
-		ext3_std_error(dir->i_sb, err);
+		ext4_std_error(dir->i_sb, err);
 		goto errout;
 	}
 	BUFFER_TRACE(frame->bh, "get_write_access");
-	err = ext3_journal_get_write_access(handle, frame->bh);
+	err = ext4_journal_get_write_access(handle, frame->bh);
 	if (err)
 		goto journal_error;
 
@@ -1153,7 +1153,7 @@ static struct ext3_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
 
 	/* create map in the end of data2 block */
 	map = (struct dx_map_entry *) (data2 + blocksize);
-	count = dx_make_map ((struct ext3_dir_entry_2 *) data1,
+	count = dx_make_map ((struct ext4_dir_entry_2 *) data1,
 			     blocksize, hinfo, map);
 	map -= count;
 	split = count/2; // need to adjust to actual middle
@@ -1168,8 +1168,8 @@ static struct ext3_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
 	de = dx_pack_dirents(data1,blocksize);
 	de->rec_len = cpu_to_le16(data1 + blocksize - (char *) de);
 	de2->rec_len = cpu_to_le16(data2 + blocksize - (char *) de2);
-	dxtrace(dx_show_leaf (hinfo, (struct ext3_dir_entry_2 *) data1, blocksize, 1));
-	dxtrace(dx_show_leaf (hinfo, (struct ext3_dir_entry_2 *) data2, blocksize, 1));
+	dxtrace(dx_show_leaf (hinfo, (struct ext4_dir_entry_2 *) data1, blocksize, 1));
+	dxtrace(dx_show_leaf (hinfo, (struct ext4_dir_entry_2 *) data2, blocksize, 1));
 
 	/* Which block gets the new entry? */
 	if (hinfo->hash >= hash2)
@@ -1178,10 +1178,10 @@ static struct ext3_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
 		de = de2;
 	}
 	dx_insert_block (frame, hash2 + continued, newblock);
-	err = ext3_journal_dirty_metadata (handle, bh2);
+	err = ext4_journal_dirty_metadata (handle, bh2);
 	if (err)
 		goto journal_error;
-	err = ext3_journal_dirty_metadata (handle, frame->bh);
+	err = ext4_journal_dirty_metadata (handle, frame->bh);
 	if (err)
 		goto journal_error;
 	brelse (bh2);
@@ -1204,7 +1204,7 @@ errout:
  * all other cases bh is released.
  */
 static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
-			     struct inode *inode, struct ext3_dir_entry_2 *de,
+			     struct inode *inode, struct ext4_dir_entry_2 *de,
 			     struct buffer_head * bh)
 {
 	struct inode	*dir = dentry->d_parent->d_inode;
@@ -1215,51 +1215,51 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
 	int		nlen, rlen, err;
 	char		*top;
 
-	reclen = EXT3_DIR_REC_LEN(namelen);
+	reclen = EXT4_DIR_REC_LEN(namelen);
 	if (!de) {
-		de = (struct ext3_dir_entry_2 *)bh->b_data;
+		de = (struct ext4_dir_entry_2 *)bh->b_data;
 		top = bh->b_data + dir->i_sb->s_blocksize - reclen;
 		while ((char *) de <= top) {
-			if (!ext3_check_dir_entry("ext3_add_entry", dir, de,
+			if (!ext4_check_dir_entry("ext4_add_entry", dir, de,
 						  bh, offset)) {
 				brelse (bh);
 				return -EIO;
 			}
-			if (ext3_match (namelen, name, de)) {
+			if (ext4_match (namelen, name, de)) {
 				brelse (bh);
 				return -EEXIST;
 			}
-			nlen = EXT3_DIR_REC_LEN(de->name_len);
+			nlen = EXT4_DIR_REC_LEN(de->name_len);
 			rlen = le16_to_cpu(de->rec_len);
 			if ((de->inode? rlen - nlen: rlen) >= reclen)
 				break;
-			de = (struct ext3_dir_entry_2 *)((char *)de + rlen);
+			de = (struct ext4_dir_entry_2 *)((char *)de + rlen);
 			offset += rlen;
 		}
 		if ((char *) de > top)
 			return -ENOSPC;
 	}
 	BUFFER_TRACE(bh, "get_write_access");
-	err = ext3_journal_get_write_access(handle, bh);
+	err = ext4_journal_get_write_access(handle, bh);
 	if (err) {
-		ext3_std_error(dir->i_sb, err);
+		ext4_std_error(dir->i_sb, err);
 		brelse(bh);
 		return err;
 	}
 
 	/* By now the buffer is marked for journaling */
-	nlen = EXT3_DIR_REC_LEN(de->name_len);
+	nlen = EXT4_DIR_REC_LEN(de->name_len);
 	rlen = le16_to_cpu(de->rec_len);
 	if (de->inode) {
-		struct ext3_dir_entry_2 *de1 = (struct ext3_dir_entry_2 *)((char *)de + nlen);
+		struct ext4_dir_entry_2 *de1 = (struct ext4_dir_entry_2 *)((char *)de + nlen);
 		de1->rec_len = cpu_to_le16(rlen - nlen);
 		de->rec_len = cpu_to_le16(nlen);
 		de = de1;
 	}
-	de->file_type = EXT3_FT_UNKNOWN;
+	de->file_type = EXT4_FT_UNKNOWN;
 	if (inode) {
 		de->inode = cpu_to_le32(inode->i_ino);
-		ext3_set_de_type(dir->i_sb, de, inode->i_mode);
+		ext4_set_de_type(dir->i_sb, de, inode->i_mode);
 	} else
 		de->inode = 0;
 	de->name_len = namelen;
@@ -1270,24 +1270,24 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
 	 * on this.
 	 *
 	 * XXX similarly, too many callers depend on
-	 * ext3_new_inode() setting the times, but error
+	 * ext4_new_inode() setting the times, but error
 	 * recovery deletes the inode, so the worst that can
 	 * happen is that the times are slightly out of date
 	 * and/or different from the directory change time.
 	 */
 	dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
-	ext3_update_dx_flag(dir);
+	ext4_update_dx_flag(dir);
 	dir->i_version++;
-	ext3_mark_inode_dirty(handle, dir);
-	BUFFER_TRACE(bh, "call ext3_journal_dirty_metadata");
-	err = ext3_journal_dirty_metadata(handle, bh);
+	ext4_mark_inode_dirty(handle, dir);
+	BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata");
+	err = ext4_journal_dirty_metadata(handle, bh);
 	if (err)
-		ext3_std_error(dir->i_sb, err);
+		ext4_std_error(dir->i_sb, err);
 	brelse(bh);
 	return 0;
 }
 
-#ifdef CONFIG_EXT3_INDEX
+#ifdef CONFIG_EXT4_INDEX
 /*
  * This converts a one block unindexed directory to a 3 block indexed
  * directory, and adds the dentry to the indexed directory.
@@ -1302,7 +1302,7 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
 	struct dx_root	*root;
 	struct dx_frame	frames[2], *frame;
 	struct dx_entry *entries;
-	struct ext3_dir_entry_2	*de, *de2;
+	struct ext4_dir_entry_2	*de, *de2;
 	char		*data1, *top;
 	unsigned	len;
 	int		retval;
@@ -1313,38 +1313,38 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
 
 	blocksize =  dir->i_sb->s_blocksize;
 	dxtrace(printk("Creating index\n"));
-	retval = ext3_journal_get_write_access(handle, bh);
+	retval = ext4_journal_get_write_access(handle, bh);
 	if (retval) {
-		ext3_std_error(dir->i_sb, retval);
+		ext4_std_error(dir->i_sb, retval);
 		brelse(bh);
 		return retval;
 	}
 	root = (struct dx_root *) bh->b_data;
 
-	bh2 = ext3_append (handle, dir, &block, &retval);
+	bh2 = ext4_append (handle, dir, &block, &retval);
 	if (!(bh2)) {
 		brelse(bh);
 		return retval;
 	}
-	EXT3_I(dir)->i_flags |= EXT3_INDEX_FL;
+	EXT4_I(dir)->i_flags |= EXT4_INDEX_FL;
 	data1 = bh2->b_data;
 
 	/* The 0th block becomes the root, move the dirents out */
 	fde = &root->dotdot;
-	de = (struct ext3_dir_entry_2 *)((char *)fde + le16_to_cpu(fde->rec_len));
+	de = (struct ext4_dir_entry_2 *)((char *)fde + le16_to_cpu(fde->rec_len));
 	len = ((char *) root) + blocksize - (char *) de;
 	memcpy (data1, de, len);
-	de = (struct ext3_dir_entry_2 *) data1;
+	de = (struct ext4_dir_entry_2 *) data1;
 	top = data1 + len;
 	while ((char *)(de2=(void*)de+le16_to_cpu(de->rec_len)) < top)
 		de = de2;
 	de->rec_len = cpu_to_le16(data1 + blocksize - (char *) de);
 	/* Initialize the root; the dot dirents already exist */
-	de = (struct ext3_dir_entry_2 *) (&root->dotdot);
-	de->rec_len = cpu_to_le16(blocksize - EXT3_DIR_REC_LEN(2));
+	de = (struct ext4_dir_entry_2 *) (&root->dotdot);
+	de->rec_len = cpu_to_le16(blocksize - EXT4_DIR_REC_LEN(2));
 	memset (&root->info, 0, sizeof(root->info));
 	root->info.info_length = sizeof(root->info);
-	root->info.hash_version = EXT3_SB(dir->i_sb)->s_def_hash_version;
+	root->info.hash_version = EXT4_SB(dir->i_sb)->s_def_hash_version;
 	entries = root->entries;
 	dx_set_block (entries, 1);
 	dx_set_count (entries, 1);
@@ -1352,8 +1352,8 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
 
 	/* Initialize as for dx_probe */
 	hinfo.hash_version = root->info.hash_version;
-	hinfo.seed = EXT3_SB(dir->i_sb)->s_hash_seed;
-	ext3fs_dirhash(name, namelen, &hinfo);
+	hinfo.seed = EXT4_SB(dir->i_sb)->s_hash_seed;
+	ext4fs_dirhash(name, namelen, &hinfo);
 	frame = frames;
 	frame->entries = entries;
 	frame->at = entries;
@@ -1369,25 +1369,25 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
 #endif
 
 /*
- *	ext3_add_entry()
+ *	ext4_add_entry()
  *
  * adds a file entry to the specified directory, using the same
- * semantics as ext3_find_entry(). It returns NULL if it failed.
+ * semantics as ext4_find_entry(). It returns NULL if it failed.
  *
  * NOTE!! The inode part of 'de' is left at 0 - which means you
  * may not sleep between calling this and putting something into
  * the entry, as someone else might have used it while you slept.
  */
-static int ext3_add_entry (handle_t *handle, struct dentry *dentry,
+static int ext4_add_entry (handle_t *handle, struct dentry *dentry,
 	struct inode *inode)
 {
 	struct inode *dir = dentry->d_parent->d_inode;
 	unsigned long offset;
 	struct buffer_head * bh;
-	struct ext3_dir_entry_2 *de;
+	struct ext4_dir_entry_2 *de;
 	struct super_block * sb;
 	int	retval;
-#ifdef CONFIG_EXT3_INDEX
+#ifdef CONFIG_EXT4_INDEX
 	int	dx_fallback=0;
 #endif
 	unsigned blocksize;
@@ -1397,46 +1397,46 @@ static int ext3_add_entry (handle_t *handle, struct dentry *dentry,
 	blocksize = sb->s_blocksize;
 	if (!dentry->d_name.len)
 		return -EINVAL;
-#ifdef CONFIG_EXT3_INDEX
+#ifdef CONFIG_EXT4_INDEX
 	if (is_dx(dir)) {
-		retval = ext3_dx_add_entry(handle, dentry, inode);
+		retval = ext4_dx_add_entry(handle, dentry, inode);
 		if (!retval || (retval != ERR_BAD_DX_DIR))
 			return retval;
-		EXT3_I(dir)->i_flags &= ~EXT3_INDEX_FL;
+		EXT4_I(dir)->i_flags &= ~EXT4_INDEX_FL;
 		dx_fallback++;
-		ext3_mark_inode_dirty(handle, dir);
+		ext4_mark_inode_dirty(handle, dir);
 	}
 #endif
 	blocks = dir->i_size >> sb->s_blocksize_bits;
 	for (block = 0, offset = 0; block < blocks; block++) {
-		bh = ext3_bread(handle, dir, block, 0, &retval);
+		bh = ext4_bread(handle, dir, block, 0, &retval);
 		if(!bh)
 			return retval;
 		retval = add_dirent_to_buf(handle, dentry, inode, NULL, bh);
 		if (retval != -ENOSPC)
 			return retval;
 
-#ifdef CONFIG_EXT3_INDEX
+#ifdef CONFIG_EXT4_INDEX
 		if (blocks == 1 && !dx_fallback &&
-		    EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_DIR_INDEX))
+		    EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX))
 			return make_indexed_dir(handle, dentry, inode, bh);
 #endif
 		brelse(bh);
 	}
-	bh = ext3_append(handle, dir, &block, &retval);
+	bh = ext4_append(handle, dir, &block, &retval);
 	if (!bh)
 		return retval;
-	de = (struct ext3_dir_entry_2 *) bh->b_data;
+	de = (struct ext4_dir_entry_2 *) bh->b_data;
 	de->inode = 0;
 	de->rec_len = cpu_to_le16(blocksize);
 	return add_dirent_to_buf(handle, dentry, inode, de, bh);
 }
 
-#ifdef CONFIG_EXT3_INDEX
+#ifdef CONFIG_EXT4_INDEX
 /*
  * Returns 0 for success, or a negative error value
  */
-static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
+static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
 			     struct inode *inode)
 {
 	struct dx_frame frames[2], *frame;
@@ -1445,7 +1445,7 @@ static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
 	struct buffer_head * bh;
 	struct inode *dir = dentry->d_parent->d_inode;
 	struct super_block * sb = dir->i_sb;
-	struct ext3_dir_entry_2 *de;
+	struct ext4_dir_entry_2 *de;
 	int err;
 
 	frame = dx_probe(dentry, NULL, &hinfo, frames, &err);
@@ -1454,11 +1454,11 @@ static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
 	entries = frame->entries;
 	at = frame->at;
 
-	if (!(bh = ext3_bread(handle,dir, dx_get_block(frame->at), 0, &err)))
+	if (!(bh = ext4_bread(handle,dir, dx_get_block(frame->at), 0, &err)))
 		goto cleanup;
 
 	BUFFER_TRACE(bh, "get_write_access");
-	err = ext3_journal_get_write_access(handle, bh);
+	err = ext4_journal_get_write_access(handle, bh);
 	if (err)
 		goto journal_error;
 
@@ -1482,12 +1482,12 @@ static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
 
 		if (levels && (dx_get_count(frames->entries) ==
 			       dx_get_limit(frames->entries))) {
-			ext3_warning(sb, __FUNCTION__,
+			ext4_warning(sb, __FUNCTION__,
 				     "Directory index full!");
 			err = -ENOSPC;
 			goto cleanup;
 		}
-		bh2 = ext3_append (handle, dir, &newblock, &err);
+		bh2 = ext4_append (handle, dir, &newblock, &err);
 		if (!(bh2))
 			goto cleanup;
 		node2 = (struct dx_node *)(bh2->b_data);
@@ -1495,7 +1495,7 @@ static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
 		node2->fake.rec_len = cpu_to_le16(sb->s_blocksize);
 		node2->fake.inode = 0;
 		BUFFER_TRACE(frame->bh, "get_write_access");
-		err = ext3_journal_get_write_access(handle, frame->bh);
+		err = ext4_journal_get_write_access(handle, frame->bh);
 		if (err)
 			goto journal_error;
 		if (levels) {
@@ -1504,7 +1504,7 @@ static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
 			dxtrace(printk("Split index %i/%i\n", icount1, icount2));
 
 			BUFFER_TRACE(frame->bh, "get_write_access"); /* index root */
-			err = ext3_journal_get_write_access(handle,
+			err = ext4_journal_get_write_access(handle,
 							     frames[0].bh);
 			if (err)
 				goto journal_error;
@@ -1525,7 +1525,7 @@ static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
 			dxtrace(dx_show_index ("node", frames[1].entries));
 			dxtrace(dx_show_index ("node",
 			       ((struct dx_node *) bh2->b_data)->entries));
-			err = ext3_journal_dirty_metadata(handle, bh2);
+			err = ext4_journal_dirty_metadata(handle, bh2);
 			if (err)
 				goto journal_error;
 			brelse (bh2);
@@ -1545,12 +1545,12 @@ static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
 			frame->at = at = at - entries + entries2;
 			frame->entries = entries = entries2;
 			frame->bh = bh2;
-			err = ext3_journal_get_write_access(handle,
+			err = ext4_journal_get_write_access(handle,
 							     frame->bh);
 			if (err)
 				goto journal_error;
 		}
-		ext3_journal_dirty_metadata(handle, frames[0].bh);
+		ext4_journal_dirty_metadata(handle, frames[0].bh);
 	}
 	de = do_split(handle, dir, &bh, frame, &hinfo, &err);
 	if (!de)
@@ -1560,7 +1560,7 @@ static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
 	goto cleanup;
 
 journal_error:
-	ext3_std_error(dir->i_sb, err);
+	ext4_std_error(dir->i_sb, err);
 cleanup:
 	if (bh)
 		brelse(bh);
@@ -1570,26 +1570,26 @@ cleanup:
 #endif
 
 /*
- * ext3_delete_entry deletes a directory entry by merging it with the
+ * ext4_delete_entry deletes a directory entry by merging it with the
  * previous entry
  */
-static int ext3_delete_entry (handle_t *handle,
+static int ext4_delete_entry (handle_t *handle,
 			      struct inode * dir,
-			      struct ext3_dir_entry_2 * de_del,
+			      struct ext4_dir_entry_2 * de_del,
 			      struct buffer_head * bh)
 {
-	struct ext3_dir_entry_2 * de, * pde;
+	struct ext4_dir_entry_2 * de, * pde;
 	int i;
 
 	i = 0;
 	pde = NULL;
-	de = (struct ext3_dir_entry_2 *) bh->b_data;
+	de = (struct ext4_dir_entry_2 *) bh->b_data;
 	while (i < bh->b_size) {
-		if (!ext3_check_dir_entry("ext3_delete_entry", dir, de, bh, i))
+		if (!ext4_check_dir_entry("ext4_delete_entry", dir, de, bh, i))
 			return -EIO;
 		if (de == de_del)  {
 			BUFFER_TRACE(bh, "get_write_access");
-			ext3_journal_get_write_access(handle, bh);
+			ext4_journal_get_write_access(handle, bh);
 			if (pde)
 				pde->rec_len =
 					cpu_to_le16(le16_to_cpu(pde->rec_len) +
@@ -1597,43 +1597,43 @@ static int ext3_delete_entry (handle_t *handle,
 			else
 				de->inode = 0;
 			dir->i_version++;
-			BUFFER_TRACE(bh, "call ext3_journal_dirty_metadata");
-			ext3_journal_dirty_metadata(handle, bh);
+			BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata");
+			ext4_journal_dirty_metadata(handle, bh);
 			return 0;
 		}
 		i += le16_to_cpu(de->rec_len);
 		pde = de;
-		de = (struct ext3_dir_entry_2 *)
+		de = (struct ext4_dir_entry_2 *)
 			((char *) de + le16_to_cpu(de->rec_len));
 	}
 	return -ENOENT;
 }
 
 /*
- * ext3_mark_inode_dirty is somewhat expensive, so unlike ext2 we
+ * ext4_mark_inode_dirty is somewhat expensive, so unlike ext2 we
  * do not perform it in these functions.  We perform it at the call site,
  * if it is needed.
  */
-static inline void ext3_inc_count(handle_t *handle, struct inode *inode)
+static inline void ext4_inc_count(handle_t *handle, struct inode *inode)
 {
 	inc_nlink(inode);
 }
 
-static inline void ext3_dec_count(handle_t *handle, struct inode *inode)
+static inline void ext4_dec_count(handle_t *handle, struct inode *inode)
 {
 	drop_nlink(inode);
 }
 
-static int ext3_add_nondir(handle_t *handle,
+static int ext4_add_nondir(handle_t *handle,
 		struct dentry *dentry, struct inode *inode)
 {
-	int err = ext3_add_entry(handle, dentry, inode);
+	int err = ext4_add_entry(handle, dentry, inode);
 	if (!err) {
-		ext3_mark_inode_dirty(handle, inode);
+		ext4_mark_inode_dirty(handle, inode);
 		d_instantiate(dentry, inode);
 		return 0;
 	}
-	ext3_dec_count(handle, inode);
+	ext4_dec_count(handle, inode);
 	iput(inode);
 	return err;
 }
@@ -1646,7 +1646,7 @@ static int ext3_add_nondir(handle_t *handle,
  * If the create succeeds, we fill in the inode information
  * with d_instantiate().
  */
-static int ext3_create (struct inode * dir, struct dentry * dentry, int mode,
+static int ext4_create (struct inode * dir, struct dentry * dentry, int mode,
 		struct nameidata *nd)
 {
 	handle_t *handle;
@@ -1654,30 +1654,30 @@ static int ext3_create (struct inode * dir, struct dentry * dentry, int mode,
 	int err, retries = 0;
 
 retry:
-	handle = ext3_journal_start(dir, EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
-					EXT3_INDEX_EXTRA_TRANS_BLOCKS + 3 +
-					2*EXT3_QUOTA_INIT_BLOCKS(dir->i_sb));
+	handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
+					EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
+					2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
 
 	if (IS_DIRSYNC(dir))
 		handle->h_sync = 1;
 
-	inode = ext3_new_inode (handle, dir, mode);
+	inode = ext4_new_inode (handle, dir, mode);
 	err = PTR_ERR(inode);
 	if (!IS_ERR(inode)) {
-		inode->i_op = &ext3_file_inode_operations;
-		inode->i_fop = &ext3_file_operations;
-		ext3_set_aops(inode);
-		err = ext3_add_nondir(handle, dentry, inode);
+		inode->i_op = &ext4_file_inode_operations;
+		inode->i_fop = &ext4_file_operations;
+		ext4_set_aops(inode);
+		err = ext4_add_nondir(handle, dentry, inode);
 	}
-	ext3_journal_stop(handle);
-	if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries))
+	ext4_journal_stop(handle);
+	if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
 		goto retry;
 	return err;
 }
 
-static int ext3_mknod (struct inode * dir, struct dentry *dentry,
+static int ext4_mknod (struct inode * dir, struct dentry *dentry,
 			int mode, dev_t rdev)
 {
 	handle_t *handle;
@@ -1688,100 +1688,100 @@ static int ext3_mknod (struct inode * dir, struct dentry *dentry,
 		return -EINVAL;
 
 retry:
-	handle = ext3_journal_start(dir, EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
-					EXT3_INDEX_EXTRA_TRANS_BLOCKS + 3 +
-					2*EXT3_QUOTA_INIT_BLOCKS(dir->i_sb));
+	handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
+					EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
+					2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
 
 	if (IS_DIRSYNC(dir))
 		handle->h_sync = 1;
 
-	inode = ext3_new_inode (handle, dir, mode);
+	inode = ext4_new_inode (handle, dir, mode);
 	err = PTR_ERR(inode);
 	if (!IS_ERR(inode)) {
 		init_special_inode(inode, inode->i_mode, rdev);
-#ifdef CONFIG_EXT3_FS_XATTR
-		inode->i_op = &ext3_special_inode_operations;
+#ifdef CONFIG_EXT4DEV_FS_XATTR
+		inode->i_op = &ext4_special_inode_operations;
 #endif
-		err = ext3_add_nondir(handle, dentry, inode);
+		err = ext4_add_nondir(handle, dentry, inode);
 	}
-	ext3_journal_stop(handle);
-	if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries))
+	ext4_journal_stop(handle);
+	if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
 		goto retry;
 	return err;
 }
 
-static int ext3_mkdir(struct inode * dir, struct dentry * dentry, int mode)
+static int ext4_mkdir(struct inode * dir, struct dentry * dentry, int mode)
 {
 	handle_t *handle;
 	struct inode * inode;
 	struct buffer_head * dir_block;
-	struct ext3_dir_entry_2 * de;
+	struct ext4_dir_entry_2 * de;
 	int err, retries = 0;
 
-	if (dir->i_nlink >= EXT3_LINK_MAX)
+	if (dir->i_nlink >= EXT4_LINK_MAX)
 		return -EMLINK;
 
 retry:
-	handle = ext3_journal_start(dir, EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
-					EXT3_INDEX_EXTRA_TRANS_BLOCKS + 3 +
-					2*EXT3_QUOTA_INIT_BLOCKS(dir->i_sb));
+	handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
+					EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
+					2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
 
 	if (IS_DIRSYNC(dir))
 		handle->h_sync = 1;
 
-	inode = ext3_new_inode (handle, dir, S_IFDIR | mode);
+	inode = ext4_new_inode (handle, dir, S_IFDIR | mode);
 	err = PTR_ERR(inode);
 	if (IS_ERR(inode))
 		goto out_stop;
 
-	inode->i_op = &ext3_dir_inode_operations;
-	inode->i_fop = &ext3_dir_operations;
-	inode->i_size = EXT3_I(inode)->i_disksize = inode->i_sb->s_blocksize;
-	dir_block = ext3_bread (handle, inode, 0, 1, &err);
+	inode->i_op = &ext4_dir_inode_operations;
+	inode->i_fop = &ext4_dir_operations;
+	inode->i_size = EXT4_I(inode)->i_disksize = inode->i_sb->s_blocksize;
+	dir_block = ext4_bread (handle, inode, 0, 1, &err);
 	if (!dir_block) {
 		drop_nlink(inode); /* is this nlink == 0? */
-		ext3_mark_inode_dirty(handle, inode);
+		ext4_mark_inode_dirty(handle, inode);
 		iput (inode);
 		goto out_stop;
 	}
 	BUFFER_TRACE(dir_block, "get_write_access");
-	ext3_journal_get_write_access(handle, dir_block);
-	de = (struct ext3_dir_entry_2 *) dir_block->b_data;
+	ext4_journal_get_write_access(handle, dir_block);
+	de = (struct ext4_dir_entry_2 *) dir_block->b_data;
 	de->inode = cpu_to_le32(inode->i_ino);
 	de->name_len = 1;
-	de->rec_len = cpu_to_le16(EXT3_DIR_REC_LEN(de->name_len));
+	de->rec_len = cpu_to_le16(EXT4_DIR_REC_LEN(de->name_len));
 	strcpy (de->name, ".");
-	ext3_set_de_type(dir->i_sb, de, S_IFDIR);
-	de = (struct ext3_dir_entry_2 *)
+	ext4_set_de_type(dir->i_sb, de, S_IFDIR);
+	de = (struct ext4_dir_entry_2 *)
 			((char *) de + le16_to_cpu(de->rec_len));
 	de->inode = cpu_to_le32(dir->i_ino);
-	de->rec_len = cpu_to_le16(inode->i_sb->s_blocksize-EXT3_DIR_REC_LEN(1));
+	de->rec_len = cpu_to_le16(inode->i_sb->s_blocksize-EXT4_DIR_REC_LEN(1));
 	de->name_len = 2;
 	strcpy (de->name, "..");
-	ext3_set_de_type(dir->i_sb, de, S_IFDIR);
+	ext4_set_de_type(dir->i_sb, de, S_IFDIR);
 	inode->i_nlink = 2;
-	BUFFER_TRACE(dir_block, "call ext3_journal_dirty_metadata");
-	ext3_journal_dirty_metadata(handle, dir_block);
+	BUFFER_TRACE(dir_block, "call ext4_journal_dirty_metadata");
+	ext4_journal_dirty_metadata(handle, dir_block);
 	brelse (dir_block);
-	ext3_mark_inode_dirty(handle, inode);
-	err = ext3_add_entry (handle, dentry, inode);
+	ext4_mark_inode_dirty(handle, inode);
+	err = ext4_add_entry (handle, dentry, inode);
 	if (err) {
 		inode->i_nlink = 0;
-		ext3_mark_inode_dirty(handle, inode);
+		ext4_mark_inode_dirty(handle, inode);
 		iput (inode);
 		goto out_stop;
 	}
 	inc_nlink(dir);
-	ext3_update_dx_flag(dir);
-	ext3_mark_inode_dirty(handle, dir);
+	ext4_update_dx_flag(dir);
+	ext4_mark_inode_dirty(handle, dir);
 	d_instantiate(dentry, inode);
 out_stop:
-	ext3_journal_stop(handle);
-	if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries))
+	ext4_journal_stop(handle);
+	if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
 		goto retry;
 	return err;
 }
@@ -1793,59 +1793,59 @@ static int empty_dir (struct inode * inode)
 {
 	unsigned long offset;
 	struct buffer_head * bh;
-	struct ext3_dir_entry_2 * de, * de1;
+	struct ext4_dir_entry_2 * de, * de1;
 	struct super_block * sb;
 	int err = 0;
 
 	sb = inode->i_sb;
-	if (inode->i_size < EXT3_DIR_REC_LEN(1) + EXT3_DIR_REC_LEN(2) ||
-	    !(bh = ext3_bread (NULL, inode, 0, 0, &err))) {
+	if (inode->i_size < EXT4_DIR_REC_LEN(1) + EXT4_DIR_REC_LEN(2) ||
+	    !(bh = ext4_bread (NULL, inode, 0, 0, &err))) {
 		if (err)
-			ext3_error(inode->i_sb, __FUNCTION__,
+			ext4_error(inode->i_sb, __FUNCTION__,
 				   "error %d reading directory #%lu offset 0",
 				   err, inode->i_ino);
 		else
-			ext3_warning(inode->i_sb, __FUNCTION__,
+			ext4_warning(inode->i_sb, __FUNCTION__,
 				     "bad directory (dir #%lu) - no data block",
 				     inode->i_ino);
 		return 1;
 	}
-	de = (struct ext3_dir_entry_2 *) bh->b_data;
-	de1 = (struct ext3_dir_entry_2 *)
+	de = (struct ext4_dir_entry_2 *) bh->b_data;
+	de1 = (struct ext4_dir_entry_2 *)
 			((char *) de + le16_to_cpu(de->rec_len));
 	if (le32_to_cpu(de->inode) != inode->i_ino ||
 			!le32_to_cpu(de1->inode) ||
 			strcmp (".", de->name) ||
 			strcmp ("..", de1->name)) {
-		ext3_warning (inode->i_sb, "empty_dir",
+		ext4_warning (inode->i_sb, "empty_dir",
 			      "bad directory (dir #%lu) - no `.' or `..'",
 			      inode->i_ino);
 		brelse (bh);
 		return 1;
 	}
 	offset = le16_to_cpu(de->rec_len) + le16_to_cpu(de1->rec_len);
-	de = (struct ext3_dir_entry_2 *)
+	de = (struct ext4_dir_entry_2 *)
 			((char *) de1 + le16_to_cpu(de1->rec_len));
 	while (offset < inode->i_size ) {
 		if (!bh ||
 			(void *) de >= (void *) (bh->b_data+sb->s_blocksize)) {
 			err = 0;
 			brelse (bh);
-			bh = ext3_bread (NULL, inode,
-				offset >> EXT3_BLOCK_SIZE_BITS(sb), 0, &err);
+			bh = ext4_bread (NULL, inode,
+				offset >> EXT4_BLOCK_SIZE_BITS(sb), 0, &err);
 			if (!bh) {
 				if (err)
-					ext3_error(sb, __FUNCTION__,
+					ext4_error(sb, __FUNCTION__,
 						   "error %d reading directory"
 						   " #%lu offset %lu",
 						   err, inode->i_ino, offset);
 				offset += sb->s_blocksize;
 				continue;
 			}
-			de = (struct ext3_dir_entry_2 *) bh->b_data;
+			de = (struct ext4_dir_entry_2 *) bh->b_data;
 		}
-		if (!ext3_check_dir_entry("empty_dir", inode, de, bh, offset)) {
-			de = (struct ext3_dir_entry_2 *)(bh->b_data +
+		if (!ext4_check_dir_entry("empty_dir", inode, de, bh, offset)) {
+			de = (struct ext4_dir_entry_2 *)(bh->b_data +
 							 sb->s_blocksize);
 			offset = (offset | (sb->s_blocksize - 1)) + 1;
 			continue;
@@ -1855,57 +1855,57 @@ static int empty_dir (struct inode * inode)
 			return 0;
 		}
 		offset += le16_to_cpu(de->rec_len);
-		de = (struct ext3_dir_entry_2 *)
+		de = (struct ext4_dir_entry_2 *)
 				((char *) de + le16_to_cpu(de->rec_len));
 	}
 	brelse (bh);
 	return 1;
 }
 
-/* ext3_orphan_add() links an unlinked or truncated inode into a list of
+/* ext4_orphan_add() links an unlinked or truncated inode into a list of
  * such inodes, starting at the superblock, in case we crash before the
  * file is closed/deleted, or in case the inode truncate spans multiple
  * transactions and the last transaction is not recovered after a crash.
  *
  * At filesystem recovery time, we walk this list deleting unlinked
- * inodes and truncating linked inodes in ext3_orphan_cleanup().
+ * inodes and truncating linked inodes in ext4_orphan_cleanup().
  */
-int ext3_orphan_add(handle_t *handle, struct inode *inode)
+int ext4_orphan_add(handle_t *handle, struct inode *inode)
 {
 	struct super_block *sb = inode->i_sb;
-	struct ext3_iloc iloc;
+	struct ext4_iloc iloc;
 	int err = 0, rc;
 
 	lock_super(sb);
-	if (!list_empty(&EXT3_I(inode)->i_orphan))
+	if (!list_empty(&EXT4_I(inode)->i_orphan))
 		goto out_unlock;
 
 	/* Orphan handling is only valid for files with data blocks
 	 * being truncated, or files being unlinked. */
 
 	/* @@@ FIXME: Observation from aviro:
-	 * I think I can trigger J_ASSERT in ext3_orphan_add().  We block
-	 * here (on lock_super()), so race with ext3_link() which might bump
+	 * I think I can trigger J_ASSERT in ext4_orphan_add().  We block
+	 * here (on lock_super()), so race with ext4_link() which might bump
 	 * ->i_nlink. For, say it, character device. Not a regular file,
 	 * not a directory, not a symlink and ->i_nlink > 0.
 	 */
 	J_ASSERT ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
 		S_ISLNK(inode->i_mode)) || inode->i_nlink == 0);
 
-	BUFFER_TRACE(EXT3_SB(sb)->s_sbh, "get_write_access");
-	err = ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh);
+	BUFFER_TRACE(EXT4_SB(sb)->s_sbh, "get_write_access");
+	err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh);
 	if (err)
 		goto out_unlock;
 
-	err = ext3_reserve_inode_write(handle, inode, &iloc);
+	err = ext4_reserve_inode_write(handle, inode, &iloc);
 	if (err)
 		goto out_unlock;
 
 	/* Insert this inode at the head of the on-disk orphan list... */
-	NEXT_ORPHAN(inode) = le32_to_cpu(EXT3_SB(sb)->s_es->s_last_orphan);
-	EXT3_SB(sb)->s_es->s_last_orphan = cpu_to_le32(inode->i_ino);
-	err = ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
-	rc = ext3_mark_iloc_dirty(handle, inode, &iloc);
+	NEXT_ORPHAN(inode) = le32_to_cpu(EXT4_SB(sb)->s_es->s_last_orphan);
+	EXT4_SB(sb)->s_es->s_last_orphan = cpu_to_le32(inode->i_ino);
+	err = ext4_journal_dirty_metadata(handle, EXT4_SB(sb)->s_sbh);
+	rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
 	if (!err)
 		err = rc;
 
@@ -1918,28 +1918,28 @@ int ext3_orphan_add(handle_t *handle, struct inode *inode)
 	 * This is safe: on error we're going to ignore the orphan list
 	 * anyway on the next recovery. */
 	if (!err)
-		list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan);
+		list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan);
 
 	jbd_debug(4, "superblock will point to %lu\n", inode->i_ino);
 	jbd_debug(4, "orphan inode %lu will point to %d\n",
 			inode->i_ino, NEXT_ORPHAN(inode));
 out_unlock:
 	unlock_super(sb);
-	ext3_std_error(inode->i_sb, err);
+	ext4_std_error(inode->i_sb, err);
 	return err;
 }
 
 /*
- * ext3_orphan_del() removes an unlinked or truncated inode from the list
+ * ext4_orphan_del() removes an unlinked or truncated inode from the list
  * of such inodes stored on disk, because it is finally being cleaned up.
  */
-int ext3_orphan_del(handle_t *handle, struct inode *inode)
+int ext4_orphan_del(handle_t *handle, struct inode *inode)
 {
 	struct list_head *prev;
-	struct ext3_inode_info *ei = EXT3_I(inode);
-	struct ext3_sb_info *sbi;
+	struct ext4_inode_info *ei = EXT4_I(inode);
+	struct ext4_sb_info *sbi;
 	unsigned long ino_next;
-	struct ext3_iloc iloc;
+	struct ext4_iloc iloc;
 	int err = 0;
 
 	lock_super(inode->i_sb);
@@ -1950,7 +1950,7 @@ int ext3_orphan_del(handle_t *handle, struct inode *inode)
 
 	ino_next = NEXT_ORPHAN(inode);
 	prev = ei->i_orphan.prev;
-	sbi = EXT3_SB(inode->i_sb);
+	sbi = EXT4_SB(inode->i_sb);
 
 	jbd_debug(4, "remove inode %lu from orphan list\n", inode->i_ino);
 
@@ -1963,38 +1963,38 @@ int ext3_orphan_del(handle_t *handle, struct inode *inode)
 	if (!handle)
 		goto out;
 
-	err = ext3_reserve_inode_write(handle, inode, &iloc);
+	err = ext4_reserve_inode_write(handle, inode, &iloc);
 	if (err)
 		goto out_err;
 
 	if (prev == &sbi->s_orphan) {
 		jbd_debug(4, "superblock will point to %lu\n", ino_next);
 		BUFFER_TRACE(sbi->s_sbh, "get_write_access");
-		err = ext3_journal_get_write_access(handle, sbi->s_sbh);
+		err = ext4_journal_get_write_access(handle, sbi->s_sbh);
 		if (err)
 			goto out_brelse;
 		sbi->s_es->s_last_orphan = cpu_to_le32(ino_next);
-		err = ext3_journal_dirty_metadata(handle, sbi->s_sbh);
+		err = ext4_journal_dirty_metadata(handle, sbi->s_sbh);
 	} else {
-		struct ext3_iloc iloc2;
+		struct ext4_iloc iloc2;
 		struct inode *i_prev =
-			&list_entry(prev, struct ext3_inode_info, i_orphan)->vfs_inode;
+			&list_entry(prev, struct ext4_inode_info, i_orphan)->vfs_inode;
 
 		jbd_debug(4, "orphan inode %lu will point to %lu\n",
 			  i_prev->i_ino, ino_next);
-		err = ext3_reserve_inode_write(handle, i_prev, &iloc2);
+		err = ext4_reserve_inode_write(handle, i_prev, &iloc2);
 		if (err)
 			goto out_brelse;
 		NEXT_ORPHAN(i_prev) = ino_next;
-		err = ext3_mark_iloc_dirty(handle, i_prev, &iloc2);
+		err = ext4_mark_iloc_dirty(handle, i_prev, &iloc2);
 	}
 	if (err)
 		goto out_brelse;
 	NEXT_ORPHAN(inode) = 0;
-	err = ext3_mark_iloc_dirty(handle, inode, &iloc);
+	err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 
 out_err:
-	ext3_std_error(inode->i_sb, err);
+	ext4_std_error(inode->i_sb, err);
 out:
 	unlock_super(inode->i_sb);
 	return err;
@@ -2004,23 +2004,23 @@ out_brelse:
 	goto out_err;
 }
 
-static int ext3_rmdir (struct inode * dir, struct dentry *dentry)
+static int ext4_rmdir (struct inode * dir, struct dentry *dentry)
 {
 	int retval;
 	struct inode * inode;
 	struct buffer_head * bh;
-	struct ext3_dir_entry_2 * de;
+	struct ext4_dir_entry_2 * de;
 	handle_t *handle;
 
 	/* Initialize quotas before so that eventual writes go in
 	 * separate transaction */
 	DQUOT_INIT(dentry->d_inode);
-	handle = ext3_journal_start(dir, EXT3_DELETE_TRANS_BLOCKS(dir->i_sb));
+	handle = ext4_journal_start(dir, EXT4_DELETE_TRANS_BLOCKS(dir->i_sb));
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
 
 	retval = -ENOENT;
-	bh = ext3_find_entry (dentry, &de);
+	bh = ext4_find_entry (dentry, &de);
 	if (!bh)
 		goto end_rmdir;
 
@@ -2037,11 +2037,11 @@ static int ext3_rmdir (struct inode * dir, struct dentry *dentry)
 	if (!empty_dir (inode))
 		goto end_rmdir;
 
-	retval = ext3_delete_entry(handle, dir, de, bh);
+	retval = ext4_delete_entry(handle, dir, de, bh);
 	if (retval)
 		goto end_rmdir;
 	if (inode->i_nlink != 2)
-		ext3_warning (inode->i_sb, "ext3_rmdir",
+		ext4_warning (inode->i_sb, "ext4_rmdir",
 			      "empty directory has nlink!=2 (%d)",
 			      inode->i_nlink);
 	inode->i_version++;
@@ -2050,31 +2050,31 @@ static int ext3_rmdir (struct inode * dir, struct dentry *dentry)
 	 * zero will ensure that the right thing happens during any
 	 * recovery. */
 	inode->i_size = 0;
-	ext3_orphan_add(handle, inode);
+	ext4_orphan_add(handle, inode);
 	inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
-	ext3_mark_inode_dirty(handle, inode);
+	ext4_mark_inode_dirty(handle, inode);
 	drop_nlink(dir);
-	ext3_update_dx_flag(dir);
-	ext3_mark_inode_dirty(handle, dir);
+	ext4_update_dx_flag(dir);
+	ext4_mark_inode_dirty(handle, dir);
 
 end_rmdir:
-	ext3_journal_stop(handle);
+	ext4_journal_stop(handle);
 	brelse (bh);
 	return retval;
 }
 
-static int ext3_unlink(struct inode * dir, struct dentry *dentry)
+static int ext4_unlink(struct inode * dir, struct dentry *dentry)
 {
 	int retval;
 	struct inode * inode;
 	struct buffer_head * bh;
-	struct ext3_dir_entry_2 * de;
+	struct ext4_dir_entry_2 * de;
 	handle_t *handle;
 
 	/* Initialize quotas before so that eventual writes go
 	 * in separate transaction */
 	DQUOT_INIT(dentry->d_inode);
-	handle = ext3_journal_start(dir, EXT3_DELETE_TRANS_BLOCKS(dir->i_sb));
+	handle = ext4_journal_start(dir, EXT4_DELETE_TRANS_BLOCKS(dir->i_sb));
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
 
@@ -2082,7 +2082,7 @@ static int ext3_unlink(struct inode * dir, struct dentry *dentry)
 		handle->h_sync = 1;
 
 	retval = -ENOENT;
-	bh = ext3_find_entry (dentry, &de);
+	bh = ext4_find_entry (dentry, &de);
 	if (!bh)
 		goto end_unlink;
 
@@ -2093,31 +2093,31 @@ static int ext3_unlink(struct inode * dir, struct dentry *dentry)
 		goto end_unlink;
 
 	if (!inode->i_nlink) {
-		ext3_warning (inode->i_sb, "ext3_unlink",
+		ext4_warning (inode->i_sb, "ext4_unlink",
 			      "Deleting nonexistent file (%lu), %d",
 			      inode->i_ino, inode->i_nlink);
 		inode->i_nlink = 1;
 	}
-	retval = ext3_delete_entry(handle, dir, de, bh);
+	retval = ext4_delete_entry(handle, dir, de, bh);
 	if (retval)
 		goto end_unlink;
 	dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
-	ext3_update_dx_flag(dir);
-	ext3_mark_inode_dirty(handle, dir);
+	ext4_update_dx_flag(dir);
+	ext4_mark_inode_dirty(handle, dir);
 	drop_nlink(inode);
 	if (!inode->i_nlink)
-		ext3_orphan_add(handle, inode);
+		ext4_orphan_add(handle, inode);
 	inode->i_ctime = dir->i_ctime;
-	ext3_mark_inode_dirty(handle, inode);
+	ext4_mark_inode_dirty(handle, inode);
 	retval = 0;
 
 end_unlink:
-	ext3_journal_stop(handle);
+	ext4_journal_stop(handle);
 	brelse (bh);
 	return retval;
 }
 
-static int ext3_symlink (struct inode * dir,
+static int ext4_symlink (struct inode * dir,
 		struct dentry *dentry, const char * symname)
 {
 	handle_t *handle;
@@ -2129,63 +2129,63 @@ static int ext3_symlink (struct inode * dir,
 		return -ENAMETOOLONG;
 
 retry:
-	handle = ext3_journal_start(dir, EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
-					EXT3_INDEX_EXTRA_TRANS_BLOCKS + 5 +
-					2*EXT3_QUOTA_INIT_BLOCKS(dir->i_sb));
+	handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
+					EXT4_INDEX_EXTRA_TRANS_BLOCKS + 5 +
+					2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
 
 	if (IS_DIRSYNC(dir))
 		handle->h_sync = 1;
 
-	inode = ext3_new_inode (handle, dir, S_IFLNK|S_IRWXUGO);
+	inode = ext4_new_inode (handle, dir, S_IFLNK|S_IRWXUGO);
 	err = PTR_ERR(inode);
 	if (IS_ERR(inode))
 		goto out_stop;
 
-	if (l > sizeof (EXT3_I(inode)->i_data)) {
-		inode->i_op = &ext3_symlink_inode_operations;
-		ext3_set_aops(inode);
+	if (l > sizeof (EXT4_I(inode)->i_data)) {
+		inode->i_op = &ext4_symlink_inode_operations;
+		ext4_set_aops(inode);
 		/*
-		 * page_symlink() calls into ext3_prepare/commit_write.
+		 * page_symlink() calls into ext4_prepare/commit_write.
 		 * We have a transaction open.  All is sweetness.  It also sets
 		 * i_size in generic_commit_write().
 		 */
 		err = __page_symlink(inode, symname, l,
 				mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
 		if (err) {
-			ext3_dec_count(handle, inode);
-			ext3_mark_inode_dirty(handle, inode);
+			ext4_dec_count(handle, inode);
+			ext4_mark_inode_dirty(handle, inode);
 			iput (inode);
 			goto out_stop;
 		}
 	} else {
-		inode->i_op = &ext3_fast_symlink_inode_operations;
-		memcpy((char*)&EXT3_I(inode)->i_data,symname,l);
+		inode->i_op = &ext4_fast_symlink_inode_operations;
+		memcpy((char*)&EXT4_I(inode)->i_data,symname,l);
 		inode->i_size = l-1;
 	}
-	EXT3_I(inode)->i_disksize = inode->i_size;
-	err = ext3_add_nondir(handle, dentry, inode);
+	EXT4_I(inode)->i_disksize = inode->i_size;
+	err = ext4_add_nondir(handle, dentry, inode);
 out_stop:
-	ext3_journal_stop(handle);
-	if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries))
+	ext4_journal_stop(handle);
+	if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
 		goto retry;
 	return err;
 }
 
-static int ext3_link (struct dentry * old_dentry,
+static int ext4_link (struct dentry * old_dentry,
 		struct inode * dir, struct dentry *dentry)
 {
 	handle_t *handle;
 	struct inode *inode = old_dentry->d_inode;
 	int err, retries = 0;
 
-	if (inode->i_nlink >= EXT3_LINK_MAX)
+	if (inode->i_nlink >= EXT4_LINK_MAX)
 		return -EMLINK;
 
 retry:
-	handle = ext3_journal_start(dir, EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
-					EXT3_INDEX_EXTRA_TRANS_BLOCKS);
+	handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
+					EXT4_INDEX_EXTRA_TRANS_BLOCKS);
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
 
@@ -2193,31 +2193,31 @@ retry:
 		handle->h_sync = 1;
 
 	inode->i_ctime = CURRENT_TIME_SEC;
-	ext3_inc_count(handle, inode);
+	ext4_inc_count(handle, inode);
 	atomic_inc(&inode->i_count);
 
-	err = ext3_add_nondir(handle, dentry, inode);
-	ext3_journal_stop(handle);
-	if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries))
+	err = ext4_add_nondir(handle, dentry, inode);
+	ext4_journal_stop(handle);
+	if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
 		goto retry;
 	return err;
 }
 
 #define PARENT_INO(buffer) \
-	((struct ext3_dir_entry_2 *) ((char *) buffer + \
-	le16_to_cpu(((struct ext3_dir_entry_2 *) buffer)->rec_len)))->inode
+	((struct ext4_dir_entry_2 *) ((char *) buffer + \
+	le16_to_cpu(((struct ext4_dir_entry_2 *) buffer)->rec_len)))->inode
 
 /*
  * Anybody can rename anything with this: the permission checks are left to the
  * higher-level routines.
  */
-static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry,
+static int ext4_rename (struct inode * old_dir, struct dentry *old_dentry,
 			   struct inode * new_dir,struct dentry *new_dentry)
 {
 	handle_t *handle;
 	struct inode * old_inode, * new_inode;
 	struct buffer_head * old_bh, * new_bh, * dir_bh;
-	struct ext3_dir_entry_2 * old_de, * new_de;
+	struct ext4_dir_entry_2 * old_de, * new_de;
 	int retval;
 
 	old_bh = new_bh = dir_bh = NULL;
@@ -2226,16 +2226,16 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry,
 	 * in separate transaction */
 	if (new_dentry->d_inode)
 		DQUOT_INIT(new_dentry->d_inode);
-	handle = ext3_journal_start(old_dir, 2 *
-					EXT3_DATA_TRANS_BLOCKS(old_dir->i_sb) +
-					EXT3_INDEX_EXTRA_TRANS_BLOCKS + 2);
+	handle = ext4_journal_start(old_dir, 2 *
+					EXT4_DATA_TRANS_BLOCKS(old_dir->i_sb) +
+					EXT4_INDEX_EXTRA_TRANS_BLOCKS + 2);
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
 
 	if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
 		handle->h_sync = 1;
 
-	old_bh = ext3_find_entry (old_dentry, &old_de);
+	old_bh = ext4_find_entry (old_dentry, &old_de);
 	/*
 	 *  Check for inode number is _not_ due to possible IO errors.
 	 *  We might rmdir the source, keep it as pwd of some process
@@ -2248,7 +2248,7 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry,
 		goto end_rename;
 
 	new_inode = new_dentry->d_inode;
-	new_bh = ext3_find_entry (new_dentry, &new_de);
+	new_bh = ext4_find_entry (new_dentry, &new_de);
 	if (new_bh) {
 		if (!new_inode) {
 			brelse (new_bh);
@@ -2262,30 +2262,30 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry,
 				goto end_rename;
 		}
 		retval = -EIO;
-		dir_bh = ext3_bread (handle, old_inode, 0, 0, &retval);
+		dir_bh = ext4_bread (handle, old_inode, 0, 0, &retval);
 		if (!dir_bh)
 			goto end_rename;
 		if (le32_to_cpu(PARENT_INO(dir_bh->b_data)) != old_dir->i_ino)
 			goto end_rename;
 		retval = -EMLINK;
 		if (!new_inode && new_dir!=old_dir &&
-				new_dir->i_nlink >= EXT3_LINK_MAX)
+				new_dir->i_nlink >= EXT4_LINK_MAX)
 			goto end_rename;
 	}
 	if (!new_bh) {
-		retval = ext3_add_entry (handle, new_dentry, old_inode);
+		retval = ext4_add_entry (handle, new_dentry, old_inode);
 		if (retval)
 			goto end_rename;
 	} else {
 		BUFFER_TRACE(new_bh, "get write access");
-		ext3_journal_get_write_access(handle, new_bh);
+		ext4_journal_get_write_access(handle, new_bh);
 		new_de->inode = cpu_to_le32(old_inode->i_ino);
-		if (EXT3_HAS_INCOMPAT_FEATURE(new_dir->i_sb,
-					      EXT3_FEATURE_INCOMPAT_FILETYPE))
+		if (EXT4_HAS_INCOMPAT_FEATURE(new_dir->i_sb,
+					      EXT4_FEATURE_INCOMPAT_FILETYPE))
 			new_de->file_type = old_de->file_type;
 		new_dir->i_version++;
-		BUFFER_TRACE(new_bh, "call ext3_journal_dirty_metadata");
-		ext3_journal_dirty_metadata(handle, new_bh);
+		BUFFER_TRACE(new_bh, "call ext4_journal_dirty_metadata");
+		ext4_journal_dirty_metadata(handle, new_bh);
 		brelse(new_bh);
 		new_bh = NULL;
 	}
@@ -2295,7 +2295,7 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry,
 	 * rename.
 	 */
 	old_inode->i_ctime = CURRENT_TIME_SEC;
-	ext3_mark_inode_dirty(handle, old_inode);
+	ext4_mark_inode_dirty(handle, old_inode);
 
 	/*
 	 * ok, that's it
@@ -2303,24 +2303,24 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry,
 	if (le32_to_cpu(old_de->inode) != old_inode->i_ino ||
 	    old_de->name_len != old_dentry->d_name.len ||
 	    strncmp(old_de->name, old_dentry->d_name.name, old_de->name_len) ||
-	    (retval = ext3_delete_entry(handle, old_dir,
+	    (retval = ext4_delete_entry(handle, old_dir,
 					old_de, old_bh)) == -ENOENT) {
 		/* old_de could have moved from under us during htree split, so
 		 * make sure that we are deleting the right entry.  We might
 		 * also be pointing to a stale entry in the unused part of
 		 * old_bh so just checking inum and the name isn't enough. */
 		struct buffer_head *old_bh2;
-		struct ext3_dir_entry_2 *old_de2;
+		struct ext4_dir_entry_2 *old_de2;
 
-		old_bh2 = ext3_find_entry(old_dentry, &old_de2);
+		old_bh2 = ext4_find_entry(old_dentry, &old_de2);
 		if (old_bh2) {
-			retval = ext3_delete_entry(handle, old_dir,
+			retval = ext4_delete_entry(handle, old_dir,
 						   old_de2, old_bh2);
 			brelse(old_bh2);
 		}
 	}
 	if (retval) {
-		ext3_warning(old_dir->i_sb, "ext3_rename",
+		ext4_warning(old_dir->i_sb, "ext4_rename",
 				"Deleting old file (%lu), %d, error=%d",
 				old_dir->i_ino, old_dir->i_nlink, retval);
 	}
@@ -2330,27 +2330,27 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry,
 		new_inode->i_ctime = CURRENT_TIME_SEC;
 	}
 	old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME_SEC;
-	ext3_update_dx_flag(old_dir);
+	ext4_update_dx_flag(old_dir);
 	if (dir_bh) {
 		BUFFER_TRACE(dir_bh, "get_write_access");
-		ext3_journal_get_write_access(handle, dir_bh);
+		ext4_journal_get_write_access(handle, dir_bh);
 		PARENT_INO(dir_bh->b_data) = cpu_to_le32(new_dir->i_ino);
-		BUFFER_TRACE(dir_bh, "call ext3_journal_dirty_metadata");
-		ext3_journal_dirty_metadata(handle, dir_bh);
+		BUFFER_TRACE(dir_bh, "call ext4_journal_dirty_metadata");
+		ext4_journal_dirty_metadata(handle, dir_bh);
 		drop_nlink(old_dir);
 		if (new_inode) {
 			drop_nlink(new_inode);
 		} else {
 			inc_nlink(new_dir);
-			ext3_update_dx_flag(new_dir);
-			ext3_mark_inode_dirty(handle, new_dir);
+			ext4_update_dx_flag(new_dir);
+			ext4_mark_inode_dirty(handle, new_dir);
 		}
 	}
-	ext3_mark_inode_dirty(handle, old_dir);
+	ext4_mark_inode_dirty(handle, old_dir);
 	if (new_inode) {
-		ext3_mark_inode_dirty(handle, new_inode);
+		ext4_mark_inode_dirty(handle, new_inode);
 		if (!new_inode->i_nlink)
-			ext3_orphan_add(handle, new_inode);
+			ext4_orphan_add(handle, new_inode);
 	}
 	retval = 0;
 
@@ -2358,40 +2358,40 @@ end_rename:
 	brelse (dir_bh);
 	brelse (old_bh);
 	brelse (new_bh);
-	ext3_journal_stop(handle);
+	ext4_journal_stop(handle);
 	return retval;
 }
 
 /*
  * directories can handle most operations...
  */
-struct inode_operations ext3_dir_inode_operations = {
-	.create		= ext3_create,
-	.lookup		= ext3_lookup,
-	.link		= ext3_link,
-	.unlink		= ext3_unlink,
-	.symlink	= ext3_symlink,
-	.mkdir		= ext3_mkdir,
-	.rmdir		= ext3_rmdir,
-	.mknod		= ext3_mknod,
-	.rename		= ext3_rename,
-	.setattr	= ext3_setattr,
-#ifdef CONFIG_EXT3_FS_XATTR
+struct inode_operations ext4_dir_inode_operations = {
+	.create		= ext4_create,
+	.lookup		= ext4_lookup,
+	.link		= ext4_link,
+	.unlink		= ext4_unlink,
+	.symlink	= ext4_symlink,
+	.mkdir		= ext4_mkdir,
+	.rmdir		= ext4_rmdir,
+	.mknod		= ext4_mknod,
+	.rename		= ext4_rename,
+	.setattr	= ext4_setattr,
+#ifdef CONFIG_EXT4DEV_FS_XATTR
 	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,
-	.listxattr	= ext3_listxattr,
+	.listxattr	= ext4_listxattr,
 	.removexattr	= generic_removexattr,
 #endif
-	.permission	= ext3_permission,
+	.permission	= ext4_permission,
 };
 
-struct inode_operations ext3_special_inode_operations = {
-	.setattr	= ext3_setattr,
-#ifdef CONFIG_EXT3_FS_XATTR
+struct inode_operations ext4_special_inode_operations = {
+	.setattr	= ext4_setattr,
+#ifdef CONFIG_EXT4DEV_FS_XATTR
 	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,
-	.listxattr	= ext3_listxattr,
+	.listxattr	= ext4_listxattr,
 	.removexattr	= generic_removexattr,
 #endif
-	.permission	= ext3_permission,
+	.permission	= ext4_permission,
 };
diff --git a/fs/ext4/namei.h b/fs/ext4/namei.h
index f2ce2b0..5e4dfff 100644
--- a/fs/ext4/namei.h
+++ b/fs/ext4/namei.h
@@ -1,8 +1,8 @@
-/*  linux/fs/ext3/namei.h
+/*  linux/fs/ext4/namei.h
  *
  * Copyright (C) 2005 Simtec Electronics
  *	Ben Dooks <ben@simtec.co.uk>
  *
 */
 
-extern struct dentry *ext3_get_parent(struct dentry *child);
+extern struct dentry *ext4_get_parent(struct dentry *child);
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index b73cba1..4a47895 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -1,7 +1,7 @@
 /*
- *  linux/fs/ext3/resize.c
+ *  linux/fs/ext4/resize.c
  *
- * Support for resizing an ext3 filesystem while it is mounted.
+ * Support for resizing an ext4 filesystem while it is mounted.
  *
  * Copyright (C) 2001, 2002 Andreas Dilger <adilger@clusterfs.com>
  *
@@ -9,11 +9,11 @@
  */
 
 
-#define EXT3FS_DEBUG
+#define EXT4FS_DEBUG
 
 #include <linux/sched.h>
 #include <linux/smp_lock.h>
-#include <linux/ext3_jbd.h>
+#include <linux/ext4_jbd.h>
 
 #include <linux/errno.h>
 #include <linux/slab.h>
@@ -23,87 +23,87 @@
 #define inside(b, first, last)	((b) >= (first) && (b) < (last))
 
 static int verify_group_input(struct super_block *sb,
-			      struct ext3_new_group_data *input)
+			      struct ext4_new_group_data *input)
 {
-	struct ext3_sb_info *sbi = EXT3_SB(sb);
-	struct ext3_super_block *es = sbi->s_es;
-	ext3_fsblk_t start = le32_to_cpu(es->s_blocks_count);
-	ext3_fsblk_t end = start + input->blocks_count;
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	struct ext4_super_block *es = sbi->s_es;
+	ext4_fsblk_t start = le32_to_cpu(es->s_blocks_count);
+	ext4_fsblk_t end = start + input->blocks_count;
 	unsigned group = input->group;
-	ext3_fsblk_t itend = input->inode_table + sbi->s_itb_per_group;
-	unsigned overhead = ext3_bg_has_super(sb, group) ?
-		(1 + ext3_bg_num_gdb(sb, group) +
+	ext4_fsblk_t itend = input->inode_table + sbi->s_itb_per_group;
+	unsigned overhead = ext4_bg_has_super(sb, group) ?
+		(1 + ext4_bg_num_gdb(sb, group) +
 		 le16_to_cpu(es->s_reserved_gdt_blocks)) : 0;
-	ext3_fsblk_t metaend = start + overhead;
+	ext4_fsblk_t metaend = start + overhead;
 	struct buffer_head *bh = NULL;
-	ext3_grpblk_t free_blocks_count;
+	ext4_grpblk_t free_blocks_count;
 	int err = -EINVAL;
 
 	input->free_blocks_count = free_blocks_count =
 		input->blocks_count - 2 - overhead - sbi->s_itb_per_group;
 
 	if (test_opt(sb, DEBUG))
-		printk(KERN_DEBUG "EXT3-fs: adding %s group %u: %u blocks "
+		printk(KERN_DEBUG "EXT4-fs: adding %s group %u: %u blocks "
 		       "(%d free, %u reserved)\n",
-		       ext3_bg_has_super(sb, input->group) ? "normal" :
+		       ext4_bg_has_super(sb, input->group) ? "normal" :
 		       "no-super", input->group, input->blocks_count,
 		       free_blocks_count, input->reserved_blocks);
 
 	if (group != sbi->s_groups_count)
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "Cannot add at group %u (only %lu groups)",
 			     input->group, sbi->s_groups_count);
 	else if ((start - le32_to_cpu(es->s_first_data_block)) %
-		 EXT3_BLOCKS_PER_GROUP(sb))
-		ext3_warning(sb, __FUNCTION__, "Last group not full");
+		 EXT4_BLOCKS_PER_GROUP(sb))
+		ext4_warning(sb, __FUNCTION__, "Last group not full");
 	else if (input->reserved_blocks > input->blocks_count / 5)
-		ext3_warning(sb, __FUNCTION__, "Reserved blocks too high (%u)",
+		ext4_warning(sb, __FUNCTION__, "Reserved blocks too high (%u)",
 			     input->reserved_blocks);
 	else if (free_blocks_count < 0)
-		ext3_warning(sb, __FUNCTION__, "Bad blocks count %u",
+		ext4_warning(sb, __FUNCTION__, "Bad blocks count %u",
 			     input->blocks_count);
 	else if (!(bh = sb_bread(sb, end - 1)))
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "Cannot read last block ("E3FSBLK")",
 			     end - 1);
 	else if (outside(input->block_bitmap, start, end))
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "Block bitmap not in group (block %u)",
 			     input->block_bitmap);
 	else if (outside(input->inode_bitmap, start, end))
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "Inode bitmap not in group (block %u)",
 			     input->inode_bitmap);
 	else if (outside(input->inode_table, start, end) ||
 	         outside(itend - 1, start, end))
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "Inode table not in group (blocks %u-"E3FSBLK")",
 			     input->inode_table, itend - 1);
 	else if (input->inode_bitmap == input->block_bitmap)
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "Block bitmap same as inode bitmap (%u)",
 			     input->block_bitmap);
 	else if (inside(input->block_bitmap, input->inode_table, itend))
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "Block bitmap (%u) in inode table (%u-"E3FSBLK")",
 			     input->block_bitmap, input->inode_table, itend-1);
 	else if (inside(input->inode_bitmap, input->inode_table, itend))
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "Inode bitmap (%u) in inode table (%u-"E3FSBLK")",
 			     input->inode_bitmap, input->inode_table, itend-1);
 	else if (inside(input->block_bitmap, start, metaend))
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "Block bitmap (%u) in GDT table"
 			     " ("E3FSBLK"-"E3FSBLK")",
 			     input->block_bitmap, start, metaend - 1);
 	else if (inside(input->inode_bitmap, start, metaend))
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "Inode bitmap (%u) in GDT table"
 			     " ("E3FSBLK"-"E3FSBLK")",
 			     input->inode_bitmap, start, metaend - 1);
 	else if (inside(input->inode_table, start, metaend) ||
 	         inside(itend - 1, start, metaend))
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "Inode table (%u-"E3FSBLK") overlaps"
 			     "GDT table ("E3FSBLK"-"E3FSBLK")",
 			     input->inode_table, itend - 1, start, metaend - 1);
@@ -115,7 +115,7 @@ static int verify_group_input(struct super_block *sb,
 }
 
 static struct buffer_head *bclean(handle_t *handle, struct super_block *sb,
-				  ext3_fsblk_t blk)
+				  ext4_fsblk_t blk)
 {
 	struct buffer_head *bh;
 	int err;
@@ -123,7 +123,7 @@ static struct buffer_head *bclean(handle_t *handle, struct super_block *sb,
 	bh = sb_getblk(sb, blk);
 	if (!bh)
 		return ERR_PTR(-EIO);
-	if ((err = ext3_journal_get_write_access(handle, bh))) {
+	if ((err = ext4_journal_get_write_access(handle, bh))) {
 		brelse(bh);
 		bh = ERR_PTR(err);
 	} else {
@@ -148,9 +148,9 @@ static void mark_bitmap_end(int start_bit, int end_bit, char *bitmap)
 	if (start_bit >= end_bit)
 		return;
 
-	ext3_debug("mark end bits +%d through +%d used\n", start_bit, end_bit);
+	ext4_debug("mark end bits +%d through +%d used\n", start_bit, end_bit);
 	for (i = start_bit; i < ((start_bit + 7) & ~7UL); i++)
-		ext3_set_bit(i, bitmap);
+		ext4_set_bit(i, bitmap);
 	if (i < end_bit)
 		memset(bitmap + (i >> 3), 0xff, (end_bit - i) >> 3);
 }
@@ -163,21 +163,21 @@ static void mark_bitmap_end(int start_bit, int end_bit, char *bitmap)
  * If any part of this fails, we simply abort the resize.
  */
 static int setup_new_group_blocks(struct super_block *sb,
-				  struct ext3_new_group_data *input)
+				  struct ext4_new_group_data *input)
 {
-	struct ext3_sb_info *sbi = EXT3_SB(sb);
-	ext3_fsblk_t start = ext3_group_first_block_no(sb, input->group);
-	int reserved_gdb = ext3_bg_has_super(sb, input->group) ?
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	ext4_fsblk_t start = ext4_group_first_block_no(sb, input->group);
+	int reserved_gdb = ext4_bg_has_super(sb, input->group) ?
 		le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) : 0;
-	unsigned long gdblocks = ext3_bg_num_gdb(sb, input->group);
+	unsigned long gdblocks = ext4_bg_num_gdb(sb, input->group);
 	struct buffer_head *bh;
 	handle_t *handle;
-	ext3_fsblk_t block;
-	ext3_grpblk_t bit;
+	ext4_fsblk_t block;
+	ext4_grpblk_t bit;
 	int i;
 	int err = 0, err2;
 
-	handle = ext3_journal_start_sb(sb, reserved_gdb + gdblocks +
+	handle = ext4_journal_start_sb(sb, reserved_gdb + gdblocks +
 				       2 + sbi->s_itb_per_group);
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
@@ -193,9 +193,9 @@ static int setup_new_group_blocks(struct super_block *sb,
 		goto exit_journal;
 	}
 
-	if (ext3_bg_has_super(sb, input->group)) {
-		ext3_debug("mark backup superblock %#04lx (+0)\n", start);
-		ext3_set_bit(0, bh->b_data);
+	if (ext4_bg_has_super(sb, input->group)) {
+		ext4_debug("mark backup superblock %#04lx (+0)\n", start);
+		ext4_set_bit(0, bh->b_data);
 	}
 
 	/* Copy all of the GDT blocks into the backup in this group */
@@ -203,14 +203,14 @@ static int setup_new_group_blocks(struct super_block *sb,
 	     i < gdblocks; i++, block++, bit++) {
 		struct buffer_head *gdb;
 
-		ext3_debug("update backup group %#04lx (+%d)\n", block, bit);
+		ext4_debug("update backup group %#04lx (+%d)\n", block, bit);
 
 		gdb = sb_getblk(sb, block);
 		if (!gdb) {
 			err = -EIO;
 			goto exit_bh;
 		}
-		if ((err = ext3_journal_get_write_access(handle, gdb))) {
+		if ((err = ext4_journal_get_write_access(handle, gdb))) {
 			brelse(gdb);
 			goto exit_bh;
 		}
@@ -218,8 +218,8 @@ static int setup_new_group_blocks(struct super_block *sb,
 		memcpy(gdb->b_data, sbi->s_group_desc[i]->b_data, bh->b_size);
 		set_buffer_uptodate(gdb);
 		unlock_buffer(bh);
-		ext3_journal_dirty_metadata(handle, gdb);
-		ext3_set_bit(bit, bh->b_data);
+		ext4_journal_dirty_metadata(handle, gdb);
+		ext4_set_bit(bit, bh->b_data);
 		brelse(gdb);
 	}
 
@@ -228,59 +228,59 @@ static int setup_new_group_blocks(struct super_block *sb,
 	     i < reserved_gdb; i++, block++, bit++) {
 		struct buffer_head *gdb;
 
-		ext3_debug("clear reserved block %#04lx (+%d)\n", block, bit);
+		ext4_debug("clear reserved block %#04lx (+%d)\n", block, bit);
 
 		if (IS_ERR(gdb = bclean(handle, sb, block))) {
 			err = PTR_ERR(bh);
 			goto exit_bh;
 		}
-		ext3_journal_dirty_metadata(handle, gdb);
-		ext3_set_bit(bit, bh->b_data);
+		ext4_journal_dirty_metadata(handle, gdb);
+		ext4_set_bit(bit, bh->b_data);
 		brelse(gdb);
 	}
-	ext3_debug("mark block bitmap %#04x (+%ld)\n", input->block_bitmap,
+	ext4_debug("mark block bitmap %#04x (+%ld)\n", input->block_bitmap,
 		   input->block_bitmap - start);
-	ext3_set_bit(input->block_bitmap - start, bh->b_data);
-	ext3_debug("mark inode bitmap %#04x (+%ld)\n", input->inode_bitmap,
+	ext4_set_bit(input->block_bitmap - start, bh->b_data);
+	ext4_debug("mark inode bitmap %#04x (+%ld)\n", input->inode_bitmap,
 		   input->inode_bitmap - start);
-	ext3_set_bit(input->inode_bitmap - start, bh->b_data);
+	ext4_set_bit(input->inode_bitmap - start, bh->b_data);
 
 	/* Zero out all of the inode table blocks */
 	for (i = 0, block = input->inode_table, bit = block - start;
 	     i < sbi->s_itb_per_group; i++, bit++, block++) {
 		struct buffer_head *it;
 
-		ext3_debug("clear inode block %#04lx (+%d)\n", block, bit);
+		ext4_debug("clear inode block %#04lx (+%d)\n", block, bit);
 		if (IS_ERR(it = bclean(handle, sb, block))) {
 			err = PTR_ERR(it);
 			goto exit_bh;
 		}
-		ext3_journal_dirty_metadata(handle, it);
+		ext4_journal_dirty_metadata(handle, it);
 		brelse(it);
-		ext3_set_bit(bit, bh->b_data);
+		ext4_set_bit(bit, bh->b_data);
 	}
-	mark_bitmap_end(input->blocks_count, EXT3_BLOCKS_PER_GROUP(sb),
+	mark_bitmap_end(input->blocks_count, EXT4_BLOCKS_PER_GROUP(sb),
 			bh->b_data);
-	ext3_journal_dirty_metadata(handle, bh);
+	ext4_journal_dirty_metadata(handle, bh);
 	brelse(bh);
 
 	/* Mark unused entries in inode bitmap used */
-	ext3_debug("clear inode bitmap %#04x (+%ld)\n",
+	ext4_debug("clear inode bitmap %#04x (+%ld)\n",
 		   input->inode_bitmap, input->inode_bitmap - start);
 	if (IS_ERR(bh = bclean(handle, sb, input->inode_bitmap))) {
 		err = PTR_ERR(bh);
 		goto exit_journal;
 	}
 
-	mark_bitmap_end(EXT3_INODES_PER_GROUP(sb), EXT3_BLOCKS_PER_GROUP(sb),
+	mark_bitmap_end(EXT4_INODES_PER_GROUP(sb), EXT4_BLOCKS_PER_GROUP(sb),
 			bh->b_data);
-	ext3_journal_dirty_metadata(handle, bh);
+	ext4_journal_dirty_metadata(handle, bh);
 exit_bh:
 	brelse(bh);
 
 exit_journal:
 	unlock_super(sb);
-	if ((err2 = ext3_journal_stop(handle)) && !err)
+	if ((err2 = ext4_journal_stop(handle)) && !err)
 		err = err2;
 
 	return err;
@@ -288,20 +288,20 @@ exit_journal:
 
 /*
  * Iterate through the groups which hold BACKUP superblock/GDT copies in an
- * ext3 filesystem.  The counters should be initialized to 1, 5, and 7 before
+ * ext4 filesystem.  The counters should be initialized to 1, 5, and 7 before
  * calling this for the first time.  In a sparse filesystem it will be the
  * sequence of powers of 3, 5, and 7: 1, 3, 5, 7, 9, 25, 27, 49, 81, ...
  * For a non-sparse filesystem it will be every group: 1, 2, 3, 4, ...
  */
-static unsigned ext3_list_backups(struct super_block *sb, unsigned *three,
+static unsigned ext4_list_backups(struct super_block *sb, unsigned *three,
 				  unsigned *five, unsigned *seven)
 {
 	unsigned *min = three;
 	int mult = 3;
 	unsigned ret;
 
-	if (!EXT3_HAS_RO_COMPAT_FEATURE(sb,
-					EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
+	if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
+					EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
 		ret = *min;
 		*min += 1;
 		return ret;
@@ -330,8 +330,8 @@ static unsigned ext3_list_backups(struct super_block *sb, unsigned *three,
 static int verify_reserved_gdb(struct super_block *sb,
 			       struct buffer_head *primary)
 {
-	const ext3_fsblk_t blk = primary->b_blocknr;
-	const unsigned long end = EXT3_SB(sb)->s_groups_count;
+	const ext4_fsblk_t blk = primary->b_blocknr;
+	const unsigned long end = EXT4_SB(sb)->s_groups_count;
 	unsigned three = 1;
 	unsigned five = 5;
 	unsigned seven = 7;
@@ -339,16 +339,16 @@ static int verify_reserved_gdb(struct super_block *sb,
 	__le32 *p = (__le32 *)primary->b_data;
 	int gdbackups = 0;
 
-	while ((grp = ext3_list_backups(sb, &three, &five, &seven)) < end) {
-		if (le32_to_cpu(*p++) != grp * EXT3_BLOCKS_PER_GROUP(sb) + blk){
-			ext3_warning(sb, __FUNCTION__,
+	while ((grp = ext4_list_backups(sb, &three, &five, &seven)) < end) {
+		if (le32_to_cpu(*p++) != grp * EXT4_BLOCKS_PER_GROUP(sb) + blk){
+			ext4_warning(sb, __FUNCTION__,
 				     "reserved GDT "E3FSBLK
 				     " missing grp %d ("E3FSBLK")",
 				     blk, grp,
-				     grp * EXT3_BLOCKS_PER_GROUP(sb) + blk);
+				     grp * EXT4_BLOCKS_PER_GROUP(sb) + blk);
 			return -EINVAL;
 		}
-		if (++gdbackups > EXT3_ADDR_PER_BLOCK(sb))
+		if (++gdbackups > EXT4_ADDR_PER_BLOCK(sb))
 			return -EFBIG;
 	}
 
@@ -369,23 +369,23 @@ static int verify_reserved_gdb(struct super_block *sb,
  * fail once we start modifying the data on disk, because JBD has no rollback.
  */
 static int add_new_gdb(handle_t *handle, struct inode *inode,
-		       struct ext3_new_group_data *input,
+		       struct ext4_new_group_data *input,
 		       struct buffer_head **primary)
 {
 	struct super_block *sb = inode->i_sb;
-	struct ext3_super_block *es = EXT3_SB(sb)->s_es;
-	unsigned long gdb_num = input->group / EXT3_DESC_PER_BLOCK(sb);
-	ext3_fsblk_t gdblock = EXT3_SB(sb)->s_sbh->b_blocknr + 1 + gdb_num;
+	struct ext4_super_block *es = EXT4_SB(sb)->s_es;
+	unsigned long gdb_num = input->group / EXT4_DESC_PER_BLOCK(sb);
+	ext4_fsblk_t gdblock = EXT4_SB(sb)->s_sbh->b_blocknr + 1 + gdb_num;
 	struct buffer_head **o_group_desc, **n_group_desc;
 	struct buffer_head *dind;
 	int gdbackups;
-	struct ext3_iloc iloc;
+	struct ext4_iloc iloc;
 	__le32 *data;
 	int err;
 
 	if (test_opt(sb, DEBUG))
 		printk(KERN_DEBUG
-		       "EXT3-fs: ext3_add_new_gdb: adding group block %lu\n",
+		       "EXT4-fs: ext4_add_new_gdb: adding group block %lu\n",
 		       gdb_num);
 
 	/*
@@ -393,11 +393,11 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
 	 * because the user tools have no way of handling this.  Probably a
 	 * bad time to do it anyways.
 	 */
-	if (EXT3_SB(sb)->s_sbh->b_blocknr !=
-	    le32_to_cpu(EXT3_SB(sb)->s_es->s_first_data_block)) {
-		ext3_warning(sb, __FUNCTION__,
+	if (EXT4_SB(sb)->s_sbh->b_blocknr !=
+	    le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block)) {
+		ext4_warning(sb, __FUNCTION__,
 			"won't resize using backup superblock at %llu",
-			(unsigned long long)EXT3_SB(sb)->s_sbh->b_blocknr);
+			(unsigned long long)EXT4_SB(sb)->s_sbh->b_blocknr);
 		return -EPERM;
 	}
 
@@ -410,7 +410,7 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
 		goto exit_bh;
 	}
 
-	data = EXT3_I(inode)->i_data + EXT3_DIND_BLOCK;
+	data = EXT4_I(inode)->i_data + EXT4_DIND_BLOCK;
 	dind = sb_bread(sb, le32_to_cpu(*data));
 	if (!dind) {
 		err = -EIO;
@@ -418,32 +418,32 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
 	}
 
 	data = (__le32 *)dind->b_data;
-	if (le32_to_cpu(data[gdb_num % EXT3_ADDR_PER_BLOCK(sb)]) != gdblock) {
-		ext3_warning(sb, __FUNCTION__,
+	if (le32_to_cpu(data[gdb_num % EXT4_ADDR_PER_BLOCK(sb)]) != gdblock) {
+		ext4_warning(sb, __FUNCTION__,
 			     "new group %u GDT block "E3FSBLK" not reserved",
 			     input->group, gdblock);
 		err = -EINVAL;
 		goto exit_dind;
 	}
 
-	if ((err = ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh)))
+	if ((err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh)))
 		goto exit_dind;
 
-	if ((err = ext3_journal_get_write_access(handle, *primary)))
+	if ((err = ext4_journal_get_write_access(handle, *primary)))
 		goto exit_sbh;
 
-	if ((err = ext3_journal_get_write_access(handle, dind)))
+	if ((err = ext4_journal_get_write_access(handle, dind)))
 		goto exit_primary;
 
-	/* ext3_reserve_inode_write() gets a reference on the iloc */
-	if ((err = ext3_reserve_inode_write(handle, inode, &iloc)))
+	/* ext4_reserve_inode_write() gets a reference on the iloc */
+	if ((err = ext4_reserve_inode_write(handle, inode, &iloc)))
 		goto exit_dindj;
 
 	n_group_desc = kmalloc((gdb_num + 1) * sizeof(struct buffer_head *),
 			GFP_KERNEL);
 	if (!n_group_desc) {
 		err = -ENOMEM;
-		ext3_warning (sb, __FUNCTION__,
+		ext4_warning (sb, __FUNCTION__,
 			      "not enough memory for %lu groups", gdb_num + 1);
 		goto exit_inode;
 	}
@@ -457,43 +457,43 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
 	 * these blocks, because they are marked as in-use from being in the
 	 * reserved inode, and will become GDT blocks (primary and backup).
 	 */
-	data[gdb_num % EXT3_ADDR_PER_BLOCK(sb)] = 0;
-	ext3_journal_dirty_metadata(handle, dind);
+	data[gdb_num % EXT4_ADDR_PER_BLOCK(sb)] = 0;
+	ext4_journal_dirty_metadata(handle, dind);
 	brelse(dind);
 	inode->i_blocks -= (gdbackups + 1) * sb->s_blocksize >> 9;
-	ext3_mark_iloc_dirty(handle, inode, &iloc);
+	ext4_mark_iloc_dirty(handle, inode, &iloc);
 	memset((*primary)->b_data, 0, sb->s_blocksize);
-	ext3_journal_dirty_metadata(handle, *primary);
+	ext4_journal_dirty_metadata(handle, *primary);
 
-	o_group_desc = EXT3_SB(sb)->s_group_desc;
+	o_group_desc = EXT4_SB(sb)->s_group_desc;
 	memcpy(n_group_desc, o_group_desc,
-	       EXT3_SB(sb)->s_gdb_count * sizeof(struct buffer_head *));
+	       EXT4_SB(sb)->s_gdb_count * sizeof(struct buffer_head *));
 	n_group_desc[gdb_num] = *primary;
-	EXT3_SB(sb)->s_group_desc = n_group_desc;
-	EXT3_SB(sb)->s_gdb_count++;
+	EXT4_SB(sb)->s_group_desc = n_group_desc;
+	EXT4_SB(sb)->s_gdb_count++;
 	kfree(o_group_desc);
 
 	es->s_reserved_gdt_blocks =
 		cpu_to_le16(le16_to_cpu(es->s_reserved_gdt_blocks) - 1);
-	ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
+	ext4_journal_dirty_metadata(handle, EXT4_SB(sb)->s_sbh);
 
 	return 0;
 
 exit_inode:
-	//ext3_journal_release_buffer(handle, iloc.bh);
+	//ext4_journal_release_buffer(handle, iloc.bh);
 	brelse(iloc.bh);
 exit_dindj:
-	//ext3_journal_release_buffer(handle, dind);
+	//ext4_journal_release_buffer(handle, dind);
 exit_primary:
-	//ext3_journal_release_buffer(handle, *primary);
+	//ext4_journal_release_buffer(handle, *primary);
 exit_sbh:
-	//ext3_journal_release_buffer(handle, *primary);
+	//ext4_journal_release_buffer(handle, *primary);
 exit_dind:
 	brelse(dind);
 exit_bh:
 	brelse(*primary);
 
-	ext3_debug("leaving with error %d\n", err);
+	ext4_debug("leaving with error %d\n", err);
 	return err;
 }
 
@@ -511,14 +511,14 @@ exit_bh:
  * backup GDT blocks are stored in their reserved primary GDT block.
  */
 static int reserve_backup_gdb(handle_t *handle, struct inode *inode,
-			      struct ext3_new_group_data *input)
+			      struct ext4_new_group_data *input)
 {
 	struct super_block *sb = inode->i_sb;
-	int reserved_gdb =le16_to_cpu(EXT3_SB(sb)->s_es->s_reserved_gdt_blocks);
+	int reserved_gdb =le16_to_cpu(EXT4_SB(sb)->s_es->s_reserved_gdt_blocks);
 	struct buffer_head **primary;
 	struct buffer_head *dind;
-	struct ext3_iloc iloc;
-	ext3_fsblk_t blk;
+	struct ext4_iloc iloc;
+	ext4_fsblk_t blk;
 	__le32 *data, *end;
 	int gdbackups = 0;
 	int res, i;
@@ -528,21 +528,21 @@ static int reserve_backup_gdb(handle_t *handle, struct inode *inode,
 	if (!primary)
 		return -ENOMEM;
 
-	data = EXT3_I(inode)->i_data + EXT3_DIND_BLOCK;
+	data = EXT4_I(inode)->i_data + EXT4_DIND_BLOCK;
 	dind = sb_bread(sb, le32_to_cpu(*data));
 	if (!dind) {
 		err = -EIO;
 		goto exit_free;
 	}
 
-	blk = EXT3_SB(sb)->s_sbh->b_blocknr + 1 + EXT3_SB(sb)->s_gdb_count;
-	data = (__le32 *)dind->b_data + EXT3_SB(sb)->s_gdb_count;
-	end = (__le32 *)dind->b_data + EXT3_ADDR_PER_BLOCK(sb);
+	blk = EXT4_SB(sb)->s_sbh->b_blocknr + 1 + EXT4_SB(sb)->s_gdb_count;
+	data = (__le32 *)dind->b_data + EXT4_SB(sb)->s_gdb_count;
+	end = (__le32 *)dind->b_data + EXT4_ADDR_PER_BLOCK(sb);
 
 	/* Get each reserved primary GDT block and verify it holds backups */
 	for (res = 0; res < reserved_gdb; res++, blk++) {
 		if (le32_to_cpu(*data) != blk) {
-			ext3_warning(sb, __FUNCTION__,
+			ext4_warning(sb, __FUNCTION__,
 				     "reserved block "E3FSBLK
 				     " not at offset %ld",
 				     blk,
@@ -565,24 +565,24 @@ static int reserve_backup_gdb(handle_t *handle, struct inode *inode,
 	}
 
 	for (i = 0; i < reserved_gdb; i++) {
-		if ((err = ext3_journal_get_write_access(handle, primary[i]))) {
+		if ((err = ext4_journal_get_write_access(handle, primary[i]))) {
 			/*
 			int j;
 			for (j = 0; j < i; j++)
-				ext3_journal_release_buffer(handle, primary[j]);
+				ext4_journal_release_buffer(handle, primary[j]);
 			 */
 			goto exit_bh;
 		}
 	}
 
-	if ((err = ext3_reserve_inode_write(handle, inode, &iloc)))
+	if ((err = ext4_reserve_inode_write(handle, inode, &iloc)))
 		goto exit_bh;
 
 	/*
 	 * Finally we can add each of the reserved backup GDT blocks from
 	 * the new group to its reserved primary GDT block.
 	 */
-	blk = input->group * EXT3_BLOCKS_PER_GROUP(sb);
+	blk = input->group * EXT4_BLOCKS_PER_GROUP(sb);
 	for (i = 0; i < reserved_gdb; i++) {
 		int err2;
 		data = (__le32 *)primary[i]->b_data;
@@ -590,12 +590,12 @@ static int reserve_backup_gdb(handle_t *handle, struct inode *inode,
 		       primary[i]->b_blocknr, gdbackups,
 		       blk + primary[i]->b_blocknr); */
 		data[gdbackups] = cpu_to_le32(blk + primary[i]->b_blocknr);
-		err2 = ext3_journal_dirty_metadata(handle, primary[i]);
+		err2 = ext4_journal_dirty_metadata(handle, primary[i]);
 		if (!err)
 			err = err2;
 	}
 	inode->i_blocks += reserved_gdb * sb->s_blocksize >> 9;
-	ext3_mark_iloc_dirty(handle, inode, &iloc);
+	ext4_mark_iloc_dirty(handle, inode, &iloc);
 
 exit_bh:
 	while (--res >= 0)
@@ -609,7 +609,7 @@ exit_free:
 }
 
 /*
- * Update the backup copies of the ext3 metadata.  These don't need to be part
+ * Update the backup copies of the ext4 metadata.  These don't need to be part
  * of the main resize transaction, because e2fsck will re-write them if there
  * is a problem (basically only OOM will cause a problem).  However, we
  * _should_ update the backups if possible, in case the primary gets trashed
@@ -626,9 +626,9 @@ exit_free:
 static void update_backups(struct super_block *sb,
 			   int blk_off, char *data, int size)
 {
-	struct ext3_sb_info *sbi = EXT3_SB(sb);
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	const unsigned long last = sbi->s_groups_count;
-	const int bpg = EXT3_BLOCKS_PER_GROUP(sb);
+	const int bpg = EXT4_BLOCKS_PER_GROUP(sb);
 	unsigned three = 1;
 	unsigned five = 5;
 	unsigned seven = 7;
@@ -637,20 +637,20 @@ static void update_backups(struct super_block *sb,
 	handle_t *handle;
 	int err = 0, err2;
 
-	handle = ext3_journal_start_sb(sb, EXT3_MAX_TRANS_DATA);
+	handle = ext4_journal_start_sb(sb, EXT4_MAX_TRANS_DATA);
 	if (IS_ERR(handle)) {
 		group = 1;
 		err = PTR_ERR(handle);
 		goto exit_err;
 	}
 
-	while ((group = ext3_list_backups(sb, &three, &five, &seven)) < last) {
+	while ((group = ext4_list_backups(sb, &three, &five, &seven)) < last) {
 		struct buffer_head *bh;
 
 		/* Out of journal space, and can't get more - abort - so sad */
 		if (handle->h_buffer_credits == 0 &&
-		    ext3_journal_extend(handle, EXT3_MAX_TRANS_DATA) &&
-		    (err = ext3_journal_restart(handle, EXT3_MAX_TRANS_DATA)))
+		    ext4_journal_extend(handle, EXT4_MAX_TRANS_DATA) &&
+		    (err = ext4_journal_restart(handle, EXT4_MAX_TRANS_DATA)))
 			break;
 
 		bh = sb_getblk(sb, group * bpg + blk_off);
@@ -658,9 +658,9 @@ static void update_backups(struct super_block *sb,
 			err = -EIO;
 			break;
 		}
-		ext3_debug("update metadata backup %#04lx\n",
+		ext4_debug("update metadata backup %#04lx\n",
 			  (unsigned long)bh->b_blocknr);
-		if ((err = ext3_journal_get_write_access(handle, bh)))
+		if ((err = ext4_journal_get_write_access(handle, bh)))
 			break;
 		lock_buffer(bh);
 		memcpy(bh->b_data, data, size);
@@ -668,10 +668,10 @@ static void update_backups(struct super_block *sb,
 			memset(bh->b_data + size, 0, rest);
 		set_buffer_uptodate(bh);
 		unlock_buffer(bh);
-		ext3_journal_dirty_metadata(handle, bh);
+		ext4_journal_dirty_metadata(handle, bh);
 		brelse(bh);
 	}
-	if ((err2 = ext3_journal_stop(handle)) && !err)
+	if ((err2 = ext4_journal_stop(handle)) && !err)
 		err = err2;
 
 	/*
@@ -686,11 +686,11 @@ static void update_backups(struct super_block *sb,
 	 */
 exit_err:
 	if (err) {
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "can't update backup for group %d (err %d), "
 			     "forcing fsck on next reboot", group, err);
-		sbi->s_mount_state &= ~EXT3_VALID_FS;
-		sbi->s_es->s_state &= cpu_to_le16(~EXT3_VALID_FS);
+		sbi->s_mount_state &= ~EXT4_VALID_FS;
+		sbi->s_es->s_state &= cpu_to_le16(~EXT4_VALID_FS);
 		mark_buffer_dirty(sbi->s_sbh);
 	}
 }
@@ -708,51 +708,51 @@ exit_err:
  * not really "added" the group at all.  We re-check that we are still
  * adding in the last group in case things have changed since verifying.
  */
-int ext3_group_add(struct super_block *sb, struct ext3_new_group_data *input)
+int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
 {
-	struct ext3_sb_info *sbi = EXT3_SB(sb);
-	struct ext3_super_block *es = sbi->s_es;
-	int reserved_gdb = ext3_bg_has_super(sb, input->group) ?
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	struct ext4_super_block *es = sbi->s_es;
+	int reserved_gdb = ext4_bg_has_super(sb, input->group) ?
 		le16_to_cpu(es->s_reserved_gdt_blocks) : 0;
 	struct buffer_head *primary = NULL;
-	struct ext3_group_desc *gdp;
+	struct ext4_group_desc *gdp;
 	struct inode *inode = NULL;
 	handle_t *handle;
 	int gdb_off, gdb_num;
 	int err, err2;
 
-	gdb_num = input->group / EXT3_DESC_PER_BLOCK(sb);
-	gdb_off = input->group % EXT3_DESC_PER_BLOCK(sb);
+	gdb_num = input->group / EXT4_DESC_PER_BLOCK(sb);
+	gdb_off = input->group % EXT4_DESC_PER_BLOCK(sb);
 
-	if (gdb_off == 0 && !EXT3_HAS_RO_COMPAT_FEATURE(sb,
-					EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
-		ext3_warning(sb, __FUNCTION__,
+	if (gdb_off == 0 && !EXT4_HAS_RO_COMPAT_FEATURE(sb,
+					EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
+		ext4_warning(sb, __FUNCTION__,
 			     "Can't resize non-sparse filesystem further");
 		return -EPERM;
 	}
 
 	if (le32_to_cpu(es->s_blocks_count) + input->blocks_count <
 	    le32_to_cpu(es->s_blocks_count)) {
-		ext3_warning(sb, __FUNCTION__, "blocks_count overflow\n");
+		ext4_warning(sb, __FUNCTION__, "blocks_count overflow\n");
 		return -EINVAL;
 	}
 
-	if (le32_to_cpu(es->s_inodes_count) + EXT3_INODES_PER_GROUP(sb) <
+	if (le32_to_cpu(es->s_inodes_count) + EXT4_INODES_PER_GROUP(sb) <
 	    le32_to_cpu(es->s_inodes_count)) {
-		ext3_warning(sb, __FUNCTION__, "inodes_count overflow\n");
+		ext4_warning(sb, __FUNCTION__, "inodes_count overflow\n");
 		return -EINVAL;
 	}
 
 	if (reserved_gdb || gdb_off == 0) {
-		if (!EXT3_HAS_COMPAT_FEATURE(sb,
-					     EXT3_FEATURE_COMPAT_RESIZE_INODE)){
-			ext3_warning(sb, __FUNCTION__,
+		if (!EXT4_HAS_COMPAT_FEATURE(sb,
+					     EXT4_FEATURE_COMPAT_RESIZE_INODE)){
+			ext4_warning(sb, __FUNCTION__,
 				     "No reserved GDT blocks, can't resize");
 			return -EPERM;
 		}
-		inode = iget(sb, EXT3_RESIZE_INO);
+		inode = iget(sb, EXT4_RESIZE_INO);
 		if (!inode || is_bad_inode(inode)) {
-			ext3_warning(sb, __FUNCTION__,
+			ext4_warning(sb, __FUNCTION__,
 				     "Error opening resize inode");
 			iput(inode);
 			return -ENOENT;
@@ -772,8 +772,8 @@ int ext3_group_add(struct super_block *sb, struct ext3_new_group_data *input)
 	 * are adding a group with superblock/GDT backups  we will also
 	 * modify each of the reserved GDT dindirect blocks.
 	 */
-	handle = ext3_journal_start_sb(sb,
-				       ext3_bg_has_super(sb, input->group) ?
+	handle = ext4_journal_start_sb(sb,
+				       ext4_bg_has_super(sb, input->group) ?
 				       3 + reserved_gdb : 4);
 	if (IS_ERR(handle)) {
 		err = PTR_ERR(handle);
@@ -782,13 +782,13 @@ int ext3_group_add(struct super_block *sb, struct ext3_new_group_data *input)
 
 	lock_super(sb);
 	if (input->group != sbi->s_groups_count) {
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "multiple resizers run on filesystem!");
 		err = -EBUSY;
 		goto exit_journal;
 	}
 
-	if ((err = ext3_journal_get_write_access(handle, sbi->s_sbh)))
+	if ((err = ext4_journal_get_write_access(handle, sbi->s_sbh)))
 		goto exit_journal;
 
 	/*
@@ -799,10 +799,10 @@ int ext3_group_add(struct super_block *sb, struct ext3_new_group_data *input)
 	 */
 	if (gdb_off) {
 		primary = sbi->s_group_desc[gdb_num];
-		if ((err = ext3_journal_get_write_access(handle, primary)))
+		if ((err = ext4_journal_get_write_access(handle, primary)))
 			goto exit_journal;
 
-		if (reserved_gdb && ext3_bg_num_gdb(sb, input->group) &&
+		if (reserved_gdb && ext4_bg_num_gdb(sb, input->group) &&
 		    (err = reserve_backup_gdb(handle, inode, input)))
 			goto exit_journal;
 	} else if ((err = add_new_gdb(handle, inode, input, &primary)))
@@ -828,13 +828,13 @@ int ext3_group_add(struct super_block *sb, struct ext3_new_group_data *input)
 	 */
 
 	/* Update group descriptor block for new group */
-	gdp = (struct ext3_group_desc *)primary->b_data + gdb_off;
+	gdp = (struct ext4_group_desc *)primary->b_data + gdb_off;
 
 	gdp->bg_block_bitmap = cpu_to_le32(input->block_bitmap);
 	gdp->bg_inode_bitmap = cpu_to_le32(input->inode_bitmap);
 	gdp->bg_inode_table = cpu_to_le32(input->inode_table);
 	gdp->bg_free_blocks_count = cpu_to_le16(input->free_blocks_count);
-	gdp->bg_free_inodes_count = cpu_to_le16(EXT3_INODES_PER_GROUP(sb));
+	gdp->bg_free_inodes_count = cpu_to_le16(EXT4_INODES_PER_GROUP(sb));
 
 	/*
 	 * Make the new blocks and inodes valid next.  We do this before
@@ -849,7 +849,7 @@ int ext3_group_add(struct super_block *sb, struct ext3_new_group_data *input)
 	es->s_blocks_count = cpu_to_le32(le32_to_cpu(es->s_blocks_count) +
 		input->blocks_count);
 	es->s_inodes_count = cpu_to_le32(le32_to_cpu(es->s_inodes_count) +
-		EXT3_INODES_PER_GROUP(sb));
+		EXT4_INODES_PER_GROUP(sb));
 
 	/*
 	 * We need to protect s_groups_count against other CPUs seeing
@@ -878,7 +878,7 @@ int ext3_group_add(struct super_block *sb, struct ext3_new_group_data *input)
 	/* Update the global fs size fields */
 	sbi->s_groups_count++;
 
-	ext3_journal_dirty_metadata(handle, primary);
+	ext4_journal_dirty_metadata(handle, primary);
 
 	/* Update the reserved block counts only once the new group is
 	 * active. */
@@ -889,42 +889,42 @@ int ext3_group_add(struct super_block *sb, struct ext3_new_group_data *input)
 	percpu_counter_mod(&sbi->s_freeblocks_counter,
 			   input->free_blocks_count);
 	percpu_counter_mod(&sbi->s_freeinodes_counter,
-			   EXT3_INODES_PER_GROUP(sb));
+			   EXT4_INODES_PER_GROUP(sb));
 
-	ext3_journal_dirty_metadata(handle, sbi->s_sbh);
+	ext4_journal_dirty_metadata(handle, sbi->s_sbh);
 	sb->s_dirt = 1;
 
 exit_journal:
 	unlock_super(sb);
-	if ((err2 = ext3_journal_stop(handle)) && !err)
+	if ((err2 = ext4_journal_stop(handle)) && !err)
 		err = err2;
 	if (!err) {
 		update_backups(sb, sbi->s_sbh->b_blocknr, (char *)es,
-			       sizeof(struct ext3_super_block));
+			       sizeof(struct ext4_super_block));
 		update_backups(sb, primary->b_blocknr, primary->b_data,
 			       primary->b_size);
 	}
 exit_put:
 	iput(inode);
 	return err;
-} /* ext3_group_add */
+} /* ext4_group_add */
 
 /* Extend the filesystem to the new number of blocks specified.  This entry
  * point is only used to extend the current filesystem to the end of the last
  * existing group.  It can be accessed via ioctl, or by "remount,resize=<size>"
  * for emergencies (because it has no dependencies on reserved blocks).
  *
- * If we _really_ wanted, we could use default values to call ext3_group_add()
+ * If we _really_ wanted, we could use default values to call ext4_group_add()
  * allow the "remount" trick to work for arbitrary resizing, assuming enough
  * GDT blocks are reserved to grow to the desired size.
  */
-int ext3_group_extend(struct super_block *sb, struct ext3_super_block *es,
-		      ext3_fsblk_t n_blocks_count)
+int ext4_group_extend(struct super_block *sb, struct ext4_super_block *es,
+		      ext4_fsblk_t n_blocks_count)
 {
-	ext3_fsblk_t o_blocks_count;
+	ext4_fsblk_t o_blocks_count;
 	unsigned long o_groups_count;
-	ext3_grpblk_t last;
-	ext3_grpblk_t add;
+	ext4_grpblk_t last;
+	ext4_grpblk_t add;
 	struct buffer_head * bh;
 	handle_t *handle;
 	int err;
@@ -934,45 +934,45 @@ int ext3_group_extend(struct super_block *sb, struct ext3_super_block *es,
 	 * yet: we're going to revalidate es->s_blocks_count after
 	 * taking lock_super() below. */
 	o_blocks_count = le32_to_cpu(es->s_blocks_count);
-	o_groups_count = EXT3_SB(sb)->s_groups_count;
+	o_groups_count = EXT4_SB(sb)->s_groups_count;
 
 	if (test_opt(sb, DEBUG))
-		printk(KERN_DEBUG "EXT3-fs: extending last group from "E3FSBLK" uto "E3FSBLK" blocks\n",
+		printk(KERN_DEBUG "EXT4-fs: extending last group from "E3FSBLK" uto "E3FSBLK" blocks\n",
 		       o_blocks_count, n_blocks_count);
 
 	if (n_blocks_count == 0 || n_blocks_count == o_blocks_count)
 		return 0;
 
 	if (n_blocks_count > (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) {
-		printk(KERN_ERR "EXT3-fs: filesystem on %s:"
+		printk(KERN_ERR "EXT4-fs: filesystem on %s:"
 			" too large to resize to %lu blocks safely\n",
 			sb->s_id, n_blocks_count);
 		if (sizeof(sector_t) < 8)
-			ext3_warning(sb, __FUNCTION__,
+			ext4_warning(sb, __FUNCTION__,
 			"CONFIG_LBD not enabled\n");
 		return -EINVAL;
 	}
 
 	if (n_blocks_count < o_blocks_count) {
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "can't shrink FS - resize aborted");
 		return -EBUSY;
 	}
 
 	/* Handle the remaining blocks in the last group only. */
 	last = (o_blocks_count - le32_to_cpu(es->s_first_data_block)) %
-		EXT3_BLOCKS_PER_GROUP(sb);
+		EXT4_BLOCKS_PER_GROUP(sb);
 
 	if (last == 0) {
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "need to use ext2online to resize further");
 		return -EPERM;
 	}
 
-	add = EXT3_BLOCKS_PER_GROUP(sb) - last;
+	add = EXT4_BLOCKS_PER_GROUP(sb) - last;
 
 	if (o_blocks_count + add < o_blocks_count) {
-		ext3_warning(sb, __FUNCTION__, "blocks_count overflow");
+		ext4_warning(sb, __FUNCTION__, "blocks_count overflow");
 		return -EINVAL;
 	}
 
@@ -980,7 +980,7 @@ int ext3_group_extend(struct super_block *sb, struct ext3_super_block *es,
 		add = n_blocks_count - o_blocks_count;
 
 	if (o_blocks_count + add < n_blocks_count)
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "will only finish group ("E3FSBLK
 			     " blocks, %u new)",
 			     o_blocks_count + add, add);
@@ -988,55 +988,55 @@ int ext3_group_extend(struct super_block *sb, struct ext3_super_block *es,
 	/* See if the device is actually as big as what was requested */
 	bh = sb_bread(sb, o_blocks_count + add -1);
 	if (!bh) {
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "can't read last block, resize aborted");
 		return -ENOSPC;
 	}
 	brelse(bh);
 
 	/* We will update the superblock, one block bitmap, and
-	 * one group descriptor via ext3_free_blocks().
+	 * one group descriptor via ext4_free_blocks().
 	 */
-	handle = ext3_journal_start_sb(sb, 3);
+	handle = ext4_journal_start_sb(sb, 3);
 	if (IS_ERR(handle)) {
 		err = PTR_ERR(handle);
-		ext3_warning(sb, __FUNCTION__, "error %d on journal start",err);
+		ext4_warning(sb, __FUNCTION__, "error %d on journal start",err);
 		goto exit_put;
 	}
 
 	lock_super(sb);
 	if (o_blocks_count != le32_to_cpu(es->s_blocks_count)) {
-		ext3_warning(sb, __FUNCTION__,
+		ext4_warning(sb, __FUNCTION__,
 			     "multiple resizers run on filesystem!");
 		unlock_super(sb);
 		err = -EBUSY;
 		goto exit_put;
 	}
 
-	if ((err = ext3_journal_get_write_access(handle,
-						 EXT3_SB(sb)->s_sbh))) {
-		ext3_warning(sb, __FUNCTION__,
+	if ((err = ext4_journal_get_write_access(handle,
+						 EXT4_SB(sb)->s_sbh))) {
+		ext4_warning(sb, __FUNCTION__,
 			     "error %d on journal write access", err);
 		unlock_super(sb);
-		ext3_journal_stop(handle);
+		ext4_journal_stop(handle);
 		goto exit_put;
 	}
 	es->s_blocks_count = cpu_to_le32(o_blocks_count + add);
-	ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
+	ext4_journal_dirty_metadata(handle, EXT4_SB(sb)->s_sbh);
 	sb->s_dirt = 1;
 	unlock_super(sb);
-	ext3_debug("freeing blocks %lu through "E3FSBLK"\n", o_blocks_count,
+	ext4_debug("freeing blocks %lu through "E3FSBLK"\n", o_blocks_count,
 		   o_blocks_count + add);
-	ext3_free_blocks_sb(handle, sb, o_blocks_count, add, &freed_blocks);
-	ext3_debug("freed blocks "E3FSBLK" through "E3FSBLK"\n", o_blocks_count,
+	ext4_free_blocks_sb(handle, sb, o_blocks_count, add, &freed_blocks);
+	ext4_debug("freed blocks "E3FSBLK" through "E3FSBLK"\n", o_blocks_count,
 		   o_blocks_count + add);
-	if ((err = ext3_journal_stop(handle)))
+	if ((err = ext4_journal_stop(handle)))
 		goto exit_put;
 	if (test_opt(sb, DEBUG))
-		printk(KERN_DEBUG "EXT3-fs: extended group to %u blocks\n",
+		printk(KERN_DEBUG "EXT4-fs: extended group to %u blocks\n",
 		       le32_to_cpu(es->s_blocks_count));
-	update_backups(sb, EXT3_SB(sb)->s_sbh->b_blocknr, (char *)es,
-		       sizeof(struct ext3_super_block));
+	update_backups(sb, EXT4_SB(sb)->s_sbh->b_blocknr, (char *)es,
+		       sizeof(struct ext4_super_block));
 exit_put:
 	return err;
-} /* ext3_group_extend */
+} /* ext4_group_extend */
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 8bfd56e..9e32a2a 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1,5 +1,5 @@
 /*
- *  linux/fs/ext3/super.c
+ *  linux/fs/ext4/super.c
  *
  * Copyright (C) 1992, 1993, 1994, 1995
  * Remy Card (card@masi.ibp.fr)
@@ -21,8 +21,8 @@
 #include <linux/fs.h>
 #include <linux/time.h>
 #include <linux/jbd.h>
-#include <linux/ext3_fs.h>
-#include <linux/ext3_jbd.h>
+#include <linux/ext4_fs.h>
+#include <linux/ext4_jbd.h>
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/blkdev.h>
@@ -42,25 +42,25 @@
 #include "acl.h"
 #include "namei.h"
 
-static int ext3_load_journal(struct super_block *, struct ext3_super_block *,
+static int ext4_load_journal(struct super_block *, struct ext4_super_block *,
 			     unsigned long journal_devnum);
-static int ext3_create_journal(struct super_block *, struct ext3_super_block *,
+static int ext4_create_journal(struct super_block *, struct ext4_super_block *,
 			       unsigned int);
-static void ext3_commit_super (struct super_block * sb,
-			       struct ext3_super_block * es,
+static void ext4_commit_super (struct super_block * sb,
+			       struct ext4_super_block * es,
 			       int sync);
-static void ext3_mark_recovery_complete(struct super_block * sb,
-					struct ext3_super_block * es);
-static void ext3_clear_journal_err(struct super_block * sb,
-				   struct ext3_super_block * es);
-static int ext3_sync_fs(struct super_block *sb, int wait);
-static const char *ext3_decode_error(struct super_block * sb, int errno,
+static void ext4_mark_recovery_complete(struct super_block * sb,
+					struct ext4_super_block * es);
+static void ext4_clear_journal_err(struct super_block * sb,
+				   struct ext4_super_block * es);
+static int ext4_sync_fs(struct super_block *sb, int wait);
+static const char *ext4_decode_error(struct super_block * sb, int errno,
 				     char nbuf[16]);
-static int ext3_remount (struct super_block * sb, int * flags, char * data);
-static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf);
-static void ext3_unlockfs(struct super_block *sb);
-static void ext3_write_super (struct super_block * sb);
-static void ext3_write_super_lockfs(struct super_block *sb);
+static int ext4_remount (struct super_block * sb, int * flags, char * data);
+static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf);
+static void ext4_unlockfs(struct super_block *sb);
+static void ext4_write_super (struct super_block * sb);
+static void ext4_write_super_lockfs(struct super_block *sb);
 
 /*
  * Wrappers for journal_start/end.
@@ -70,7 +70,7 @@ static void ext3_write_super_lockfs(struct super_block *sb);
  * that sync() will call the filesystem's write_super callback if
  * appropriate.
  */
-handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks)
+handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks)
 {
 	journal_t *journal;
 
@@ -80,9 +80,9 @@ handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks)
 	/* Special case here: if the journal has aborted behind our
 	 * backs (eg. EIO in the commit thread), then we still need to
 	 * take the FS itself readonly cleanly. */
-	journal = EXT3_SB(sb)->s_journal;
+	journal = EXT4_SB(sb)->s_journal;
 	if (is_journal_aborted(journal)) {
-		ext3_abort(sb, __FUNCTION__,
+		ext4_abort(sb, __FUNCTION__,
 			   "Detected aborted journal");
 		return ERR_PTR(-EROFS);
 	}
@@ -96,7 +96,7 @@ handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks)
  * that sync() will call the filesystem's write_super callback if
  * appropriate.
  */
-int __ext3_journal_stop(const char *where, handle_t *handle)
+int __ext4_journal_stop(const char *where, handle_t *handle)
 {
 	struct super_block *sb;
 	int err;
@@ -109,15 +109,15 @@ int __ext3_journal_stop(const char *where, handle_t *handle)
 	if (!err)
 		err = rc;
 	if (err)
-		__ext3_std_error(sb, where, err);
+		__ext4_std_error(sb, where, err);
 	return err;
 }
 
-void ext3_journal_abort_handle(const char *caller, const char *err_fn,
+void ext4_journal_abort_handle(const char *caller, const char *err_fn,
 		struct buffer_head *bh, handle_t *handle, int err)
 {
 	char nbuf[16];
-	const char *errstr = ext3_decode_error(NULL, err, nbuf);
+	const char *errstr = ext4_decode_error(NULL, err, nbuf);
 
 	if (bh)
 		BUFFER_TRACE(bh, "abort");
@@ -138,7 +138,7 @@ void ext3_journal_abort_handle(const char *caller, const char *err_fn,
  * inconsistencies detected or read IO failures.
  *
  * On ext2, we can store the error state of the filesystem in the
- * superblock.  That is not possible on ext3, because we may have other
+ * superblock.  That is not possible on ext4, because we may have other
  * write ordering constraints on the superblock which prevent us from
  * writing it out straight away; and given that the journal is about to
  * be aborted, we can't rely on the current, or future, transactions to
@@ -149,20 +149,20 @@ void ext3_journal_abort_handle(const char *caller, const char *err_fn,
  * that error until we've noted it down and cleared it.
  */
 
-static void ext3_handle_error(struct super_block *sb)
+static void ext4_handle_error(struct super_block *sb)
 {
-	struct ext3_super_block *es = EXT3_SB(sb)->s_es;
+	struct ext4_super_block *es = EXT4_SB(sb)->s_es;
 
-	EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
-	es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
+	EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
+	es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
 
 	if (sb->s_flags & MS_RDONLY)
 		return;
 
 	if (!test_opt (sb, ERRORS_CONT)) {
-		journal_t *journal = EXT3_SB(sb)->s_journal;
+		journal_t *journal = EXT4_SB(sb)->s_journal;
 
-		EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT;
+		EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT;
 		if (journal)
 			journal_abort(journal, -EIO);
 	}
@@ -170,27 +170,27 @@ static void ext3_handle_error(struct super_block *sb)
 		printk (KERN_CRIT "Remounting filesystem read-only\n");
 		sb->s_flags |= MS_RDONLY;
 	}
-	ext3_commit_super(sb, es, 1);
+	ext4_commit_super(sb, es, 1);
 	if (test_opt(sb, ERRORS_PANIC))
-		panic("EXT3-fs (device %s): panic forced after error\n",
+		panic("EXT4-fs (device %s): panic forced after error\n",
 			sb->s_id);
 }
 
-void ext3_error (struct super_block * sb, const char * function,
+void ext4_error (struct super_block * sb, const char * function,
 		 const char * fmt, ...)
 {
 	va_list args;
 
 	va_start(args, fmt);
-	printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
+	printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function);
 	vprintk(fmt, args);
 	printk("\n");
 	va_end(args);
 
-	ext3_handle_error(sb);
+	ext4_handle_error(sb);
 }
 
-static const char *ext3_decode_error(struct super_block * sb, int errno,
+static const char *ext4_decode_error(struct super_block * sb, int errno,
 				     char nbuf[16])
 {
 	char *errstr = NULL;
@@ -203,7 +203,7 @@ static const char *ext3_decode_error(struct super_block * sb, int errno,
 		errstr = "Out of memory";
 		break;
 	case -EROFS:
-		if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT)
+		if (!sb || EXT4_SB(sb)->s_journal->j_flags & JFS_ABORT)
 			errstr = "Journal has aborted";
 		else
 			errstr = "Readonly filesystem";
@@ -223,10 +223,10 @@ static const char *ext3_decode_error(struct super_block * sb, int errno,
 	return errstr;
 }
 
-/* __ext3_std_error decodes expected errors from journaling functions
+/* __ext4_std_error decodes expected errors from journaling functions
  * automatically and invokes the appropriate error response.  */
 
-void __ext3_std_error (struct super_block * sb, const char * function,
+void __ext4_std_error (struct super_block * sb, const char * function,
 		       int errno)
 {
 	char nbuf[16];
@@ -239,15 +239,15 @@ void __ext3_std_error (struct super_block * sb, const char * function,
 	    (sb->s_flags & MS_RDONLY))
 		return;
 
-	errstr = ext3_decode_error(sb, errno, nbuf);
-	printk (KERN_CRIT "EXT3-fs error (device %s) in %s: %s\n",
+	errstr = ext4_decode_error(sb, errno, nbuf);
+	printk (KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n",
 		sb->s_id, function, errstr);
 
-	ext3_handle_error(sb);
+	ext4_handle_error(sb);
 }
 
 /*
- * ext3_abort is a much stronger failure handler than ext3_error.  The
+ * ext4_abort is a much stronger failure handler than ext4_error.  The
  * abort function may be used to deal with unrecoverable failures such
  * as journal IO errors or ENOMEM at a critical moment in log management.
  *
@@ -256,60 +256,60 @@ void __ext3_std_error (struct super_block * sb, const char * function,
  * case we take the easy way out and panic immediately.
  */
 
-void ext3_abort (struct super_block * sb, const char * function,
+void ext4_abort (struct super_block * sb, const char * function,
 		 const char * fmt, ...)
 {
 	va_list args;
 
-	printk (KERN_CRIT "ext3_abort called.\n");
+	printk (KERN_CRIT "ext4_abort called.\n");
 
 	va_start(args, fmt);
-	printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
+	printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function);
 	vprintk(fmt, args);
 	printk("\n");
 	va_end(args);
 
 	if (test_opt(sb, ERRORS_PANIC))
-		panic("EXT3-fs panic from previous error\n");
+		panic("EXT4-fs panic from previous error\n");
 
 	if (sb->s_flags & MS_RDONLY)
 		return;
 
 	printk(KERN_CRIT "Remounting filesystem read-only\n");
-	EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
+	EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
 	sb->s_flags |= MS_RDONLY;
-	EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT;
-	journal_abort(EXT3_SB(sb)->s_journal, -EIO);
+	EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT;
+	journal_abort(EXT4_SB(sb)->s_journal, -EIO);
 }
 
-void ext3_warning (struct super_block * sb, const char * function,
+void ext4_warning (struct super_block * sb, const char * function,
 		   const char * fmt, ...)
 {
 	va_list args;
 
 	va_start(args, fmt);
-	printk(KERN_WARNING "EXT3-fs warning (device %s): %s: ",
+	printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ",
 	       sb->s_id, function);
 	vprintk(fmt, args);
 	printk("\n");
 	va_end(args);
 }
 
-void ext3_update_dynamic_rev(struct super_block *sb)
+void ext4_update_dynamic_rev(struct super_block *sb)
 {
-	struct ext3_super_block *es = EXT3_SB(sb)->s_es;
+	struct ext4_super_block *es = EXT4_SB(sb)->s_es;
 
-	if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV)
+	if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV)
 		return;
 
-	ext3_warning(sb, __FUNCTION__,
+	ext4_warning(sb, __FUNCTION__,
 		     "updating to rev %d because of new feature flag, "
 		     "running e2fsck is recommended",
-		     EXT3_DYNAMIC_REV);
+		     EXT4_DYNAMIC_REV);
 
-	es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO);
-	es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE);
-	es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV);
+	es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO);
+	es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE);
+	es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV);
 	/* leave es->s_feature_*compat flags alone */
 	/* es->s_uuid will be set by e2fsck if empty */
 
@@ -323,7 +323,7 @@ void ext3_update_dynamic_rev(struct super_block *sb)
 /*
  * Open the external journal device
  */
-static struct block_device *ext3_blkdev_get(dev_t dev)
+static struct block_device *ext4_blkdev_get(dev_t dev)
 {
 	struct block_device *bdev;
 	char b[BDEVNAME_SIZE];
@@ -334,7 +334,7 @@ static struct block_device *ext3_blkdev_get(dev_t dev)
 	return bdev;
 
 fail:
-	printk(KERN_ERR "EXT3: failed to open journal device %s: %ld\n",
+	printk(KERN_ERR "EXT4: failed to open journal device %s: %ld\n",
 			__bdevname(dev, b), PTR_ERR(bdev));
 	return NULL;
 }
@@ -342,20 +342,20 @@ fail:
 /*
  * Release the journal device
  */
-static int ext3_blkdev_put(struct block_device *bdev)
+static int ext4_blkdev_put(struct block_device *bdev)
 {
 	bd_release(bdev);
 	return blkdev_put(bdev);
 }
 
-static int ext3_blkdev_remove(struct ext3_sb_info *sbi)
+static int ext4_blkdev_remove(struct ext4_sb_info *sbi)
 {
 	struct block_device *bdev;
 	int ret = -ENODEV;
 
 	bdev = sbi->journal_bdev;
 	if (bdev) {
-		ret = ext3_blkdev_put(bdev);
+		ret = ext4_blkdev_put(bdev);
 		sbi->journal_bdev = NULL;
 	}
 	return ret;
@@ -363,10 +363,10 @@ static int ext3_blkdev_remove(struct ext3_sb_info *sbi)
 
 static inline struct inode *orphan_list_entry(struct list_head *l)
 {
-	return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode;
+	return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode;
 }
 
-static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi)
+static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi)
 {
 	struct list_head *l;
 
@@ -384,20 +384,20 @@ static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi)
 	}
 }
 
-static void ext3_put_super (struct super_block * sb)
+static void ext4_put_super (struct super_block * sb)
 {
-	struct ext3_sb_info *sbi = EXT3_SB(sb);
-	struct ext3_super_block *es = sbi->s_es;
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	struct ext4_super_block *es = sbi->s_es;
 	int i;
 
-	ext3_xattr_put_super(sb);
+	ext4_xattr_put_super(sb);
 	journal_destroy(sbi->s_journal);
 	if (!(sb->s_flags & MS_RDONLY)) {
-		EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
+		EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
 		es->s_state = cpu_to_le16(sbi->s_mount_state);
 		BUFFER_TRACE(sbi->s_sbh, "marking dirty");
 		mark_buffer_dirty(sbi->s_sbh);
-		ext3_commit_super(sb, es, 1);
+		ext4_commit_super(sb, es, 1);
 	}
 
 	for (i = 0; i < sbi->s_gdb_count; i++)
@@ -429,47 +429,47 @@ static void ext3_put_super (struct super_block * sb)
 		 */
 		sync_blockdev(sbi->journal_bdev);
 		invalidate_bdev(sbi->journal_bdev, 0);
-		ext3_blkdev_remove(sbi);
+		ext4_blkdev_remove(sbi);
 	}
 	sb->s_fs_info = NULL;
 	kfree(sbi);
 	return;
 }
 
-static kmem_cache_t *ext3_inode_cachep;
+static kmem_cache_t *ext4_inode_cachep;
 
 /*
  * Called inside transaction, so use GFP_NOFS
  */
-static struct inode *ext3_alloc_inode(struct super_block *sb)
+static struct inode *ext4_alloc_inode(struct super_block *sb)
 {
-	struct ext3_inode_info *ei;
+	struct ext4_inode_info *ei;
 
-	ei = kmem_cache_alloc(ext3_inode_cachep, SLAB_NOFS);
+	ei = kmem_cache_alloc(ext4_inode_cachep, SLAB_NOFS);
 	if (!ei)
 		return NULL;
-#ifdef CONFIG_EXT3_FS_POSIX_ACL
-	ei->i_acl = EXT3_ACL_NOT_CACHED;
-	ei->i_default_acl = EXT3_ACL_NOT_CACHED;
+#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+	ei->i_acl = EXT4_ACL_NOT_CACHED;
+	ei->i_default_acl = EXT4_ACL_NOT_CACHED;
 #endif
 	ei->i_block_alloc_info = NULL;
 	ei->vfs_inode.i_version = 1;
 	return &ei->vfs_inode;
 }
 
-static void ext3_destroy_inode(struct inode *inode)
+static void ext4_destroy_inode(struct inode *inode)
 {
-	kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
+	kmem_cache_free(ext4_inode_cachep, EXT4_I(inode));
 }
 
 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
 {
-	struct ext3_inode_info *ei = (struct ext3_inode_info *) foo;
+	struct ext4_inode_info *ei = (struct ext4_inode_info *) foo;
 
 	if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
 	    SLAB_CTOR_CONSTRUCTOR) {
 		INIT_LIST_HEAD(&ei->i_orphan);
-#ifdef CONFIG_EXT3_FS_XATTR
+#ifdef CONFIG_EXT4DEV_FS_XATTR
 		init_rwsem(&ei->xattr_sem);
 #endif
 		mutex_init(&ei->truncate_mutex);
@@ -479,46 +479,46 @@ static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
 
 static int init_inodecache(void)
 {
-	ext3_inode_cachep = kmem_cache_create("ext3_inode_cache",
-					     sizeof(struct ext3_inode_info),
+	ext4_inode_cachep = kmem_cache_create("ext4_inode_cache",
+					     sizeof(struct ext4_inode_info),
 					     0, (SLAB_RECLAIM_ACCOUNT|
 						SLAB_MEM_SPREAD),
 					     init_once, NULL);
-	if (ext3_inode_cachep == NULL)
+	if (ext4_inode_cachep == NULL)
 		return -ENOMEM;
 	return 0;
 }
 
 static void destroy_inodecache(void)
 {
-	kmem_cache_destroy(ext3_inode_cachep);
+	kmem_cache_destroy(ext4_inode_cachep);
 }
 
-static void ext3_clear_inode(struct inode *inode)
+static void ext4_clear_inode(struct inode *inode)
 {
-	struct ext3_block_alloc_info *rsv = EXT3_I(inode)->i_block_alloc_info;
-#ifdef CONFIG_EXT3_FS_POSIX_ACL
-	if (EXT3_I(inode)->i_acl &&
-			EXT3_I(inode)->i_acl != EXT3_ACL_NOT_CACHED) {
-		posix_acl_release(EXT3_I(inode)->i_acl);
-		EXT3_I(inode)->i_acl = EXT3_ACL_NOT_CACHED;
-	}
-	if (EXT3_I(inode)->i_default_acl &&
-			EXT3_I(inode)->i_default_acl != EXT3_ACL_NOT_CACHED) {
-		posix_acl_release(EXT3_I(inode)->i_default_acl);
-		EXT3_I(inode)->i_default_acl = EXT3_ACL_NOT_CACHED;
+	struct ext4_block_alloc_info *rsv = EXT4_I(inode)->i_block_alloc_info;
+#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+	if (EXT4_I(inode)->i_acl &&
+			EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) {
+		posix_acl_release(EXT4_I(inode)->i_acl);
+		EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED;
+	}
+	if (EXT4_I(inode)->i_default_acl &&
+			EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) {
+		posix_acl_release(EXT4_I(inode)->i_default_acl);
+		EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED;
 	}
 #endif
-	ext3_discard_reservation(inode);
-	EXT3_I(inode)->i_block_alloc_info = NULL;
+	ext4_discard_reservation(inode);
+	EXT4_I(inode)->i_block_alloc_info = NULL;
 	if (unlikely(rsv))
 		kfree(rsv);
 }
 
-static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb)
+static inline void ext4_show_quota_options(struct seq_file *seq, struct super_block *sb)
 {
 #if defined(CONFIG_QUOTA)
-	struct ext3_sb_info *sbi = EXT3_SB(sb);
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
 
 	if (sbi->s_jquota_fmt)
 		seq_printf(seq, ",jqfmt=%s",
@@ -530,32 +530,32 @@ static inline void ext3_show_quota_options(struct seq_file *seq, struct super_bl
 	if (sbi->s_qf_names[GRPQUOTA])
 		seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]);
 
-	if (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA)
+	if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA)
 		seq_puts(seq, ",usrquota");
 
-	if (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)
+	if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)
 		seq_puts(seq, ",grpquota");
 #endif
 }
 
-static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs)
+static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
 {
 	struct super_block *sb = vfs->mnt_sb;
 
-	if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA)
+	if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)
 		seq_puts(seq, ",data=journal");
-	else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA)
+	else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA)
 		seq_puts(seq, ",data=ordered");
-	else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)
+	else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)
 		seq_puts(seq, ",data=writeback");
 
-	ext3_show_quota_options(seq, sb);
+	ext4_show_quota_options(seq, sb);
 
 	return 0;
 }
 
 
-static struct dentry *ext3_get_dentry(struct super_block *sb, void *vobjp)
+static struct dentry *ext4_get_dentry(struct super_block *sb, void *vobjp)
 {
 	__u32 *objp = vobjp;
 	unsigned long ino = objp[0];
@@ -563,14 +563,14 @@ static struct dentry *ext3_get_dentry(struct super_block *sb, void *vobjp)
 	struct inode *inode;
 	struct dentry *result;
 
-	if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO)
+	if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO)
 		return ERR_PTR(-ESTALE);
-	if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count))
+	if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count))
 		return ERR_PTR(-ESTALE);
 
 	/* iget isn't really right if the inode is currently unallocated!!
 	 *
-	 * ext3_read_inode will return a bad_inode if the inode had been
+	 * ext4_read_inode will return a bad_inode if the inode had been
 	 * deleted, so we should be safe.
 	 *
 	 * Currently we don't know the generation for parent directory, so
@@ -599,37 +599,37 @@ static struct dentry *ext3_get_dentry(struct super_block *sb, void *vobjp)
 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
 
-static int ext3_dquot_initialize(struct inode *inode, int type);
-static int ext3_dquot_drop(struct inode *inode);
-static int ext3_write_dquot(struct dquot *dquot);
-static int ext3_acquire_dquot(struct dquot *dquot);
-static int ext3_release_dquot(struct dquot *dquot);
-static int ext3_mark_dquot_dirty(struct dquot *dquot);
-static int ext3_write_info(struct super_block *sb, int type);
-static int ext3_quota_on(struct super_block *sb, int type, int format_id, char *path);
-static int ext3_quota_on_mount(struct super_block *sb, int type);
-static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
+static int ext4_dquot_initialize(struct inode *inode, int type);
+static int ext4_dquot_drop(struct inode *inode);
+static int ext4_write_dquot(struct dquot *dquot);
+static int ext4_acquire_dquot(struct dquot *dquot);
+static int ext4_release_dquot(struct dquot *dquot);
+static int ext4_mark_dquot_dirty(struct dquot *dquot);
+static int ext4_write_info(struct super_block *sb, int type);
+static int ext4_quota_on(struct super_block *sb, int type, int format_id, char *path);
+static int ext4_quota_on_mount(struct super_block *sb, int type);
+static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
 			       size_t len, loff_t off);
-static ssize_t ext3_quota_write(struct super_block *sb, int type,
+static ssize_t ext4_quota_write(struct super_block *sb, int type,
 				const char *data, size_t len, loff_t off);
 
-static struct dquot_operations ext3_quota_operations = {
-	.initialize	= ext3_dquot_initialize,
-	.drop		= ext3_dquot_drop,
+static struct dquot_operations ext4_quota_operations = {
+	.initialize	= ext4_dquot_initialize,
+	.drop		= ext4_dquot_drop,
 	.alloc_space	= dquot_alloc_space,
 	.alloc_inode	= dquot_alloc_inode,
 	.free_space	= dquot_free_space,
 	.free_inode	= dquot_free_inode,
 	.transfer	= dquot_transfer,
-	.write_dquot	= ext3_write_dquot,
-	.acquire_dquot	= ext3_acquire_dquot,
-	.release_dquot	= ext3_release_dquot,
-	.mark_dirty	= ext3_mark_dquot_dirty,
-	.write_info	= ext3_write_info
+	.write_dquot	= ext4_write_dquot,
+	.acquire_dquot	= ext4_acquire_dquot,
+	.release_dquot	= ext4_release_dquot,
+	.mark_dirty	= ext4_mark_dquot_dirty,
+	.write_info	= ext4_write_info
 };
 
-static struct quotactl_ops ext3_qctl_operations = {
-	.quota_on	= ext3_quota_on,
+static struct quotactl_ops ext4_qctl_operations = {
+	.quota_on	= ext4_quota_on,
 	.quota_off	= vfs_quota_off,
 	.quota_sync	= vfs_quota_sync,
 	.get_info	= vfs_get_dqinfo,
@@ -639,31 +639,31 @@ static struct quotactl_ops ext3_qctl_operations = {
 };
 #endif
 
-static struct super_operations ext3_sops = {
-	.alloc_inode	= ext3_alloc_inode,
-	.destroy_inode	= ext3_destroy_inode,
-	.read_inode	= ext3_read_inode,
-	.write_inode	= ext3_write_inode,
-	.dirty_inode	= ext3_dirty_inode,
-	.delete_inode	= ext3_delete_inode,
-	.put_super	= ext3_put_super,
-	.write_super	= ext3_write_super,
-	.sync_fs	= ext3_sync_fs,
-	.write_super_lockfs = ext3_write_super_lockfs,
-	.unlockfs	= ext3_unlockfs,
-	.statfs		= ext3_statfs,
-	.remount_fs	= ext3_remount,
-	.clear_inode	= ext3_clear_inode,
-	.show_options	= ext3_show_options,
+static struct super_operations ext4_sops = {
+	.alloc_inode	= ext4_alloc_inode,
+	.destroy_inode	= ext4_destroy_inode,
+	.read_inode	= ext4_read_inode,
+	.write_inode	= ext4_write_inode,
+	.dirty_inode	= ext4_dirty_inode,
+	.delete_inode	= ext4_delete_inode,
+	.put_super	= ext4_put_super,
+	.write_super	= ext4_write_super,
+	.sync_fs	= ext4_sync_fs,
+	.write_super_lockfs = ext4_write_super_lockfs,
+	.unlockfs	= ext4_unlockfs,
+	.statfs		= ext4_statfs,
+	.remount_fs	= ext4_remount,
+	.clear_inode	= ext4_clear_inode,
+	.show_options	= ext4_show_options,
 #ifdef CONFIG_QUOTA
-	.quota_read	= ext3_quota_read,
-	.quota_write	= ext3_quota_write,
+	.quota_read	= ext4_quota_read,
+	.quota_write	= ext4_quota_write,
 #endif
 };
 
-static struct export_operations ext3_export_ops = {
-	.get_parent = ext3_get_parent,
-	.get_dentry = ext3_get_dentry,
+static struct export_operations ext4_export_ops = {
+	.get_parent = ext4_get_parent,
+	.get_dentry = ext4_get_dentry,
 };
 
 enum {
@@ -731,18 +731,18 @@ static match_table_t tokens = {
 	{Opt_resize, "resize"},
 };
 
-static ext3_fsblk_t get_sb_block(void **data)
+static ext4_fsblk_t get_sb_block(void **data)
 {
-	ext3_fsblk_t	sb_block;
+	ext4_fsblk_t	sb_block;
 	char		*options = (char *) *data;
 
 	if (!options || strncmp(options, "sb=", 3) != 0)
 		return 1;	/* Default location */
 	options += 3;
-	/*todo: use simple_strtoll with >32bit ext3 */
+	/*todo: use simple_strtoll with >32bit ext4 */
 	sb_block = simple_strtoul(options, &options, 0);
 	if (*options && *options != ',') {
-		printk("EXT3-fs: Invalid sb specification: %s\n",
+		printk("EXT4-fs: Invalid sb specification: %s\n",
 		       (char *) *data);
 		return 1;
 	}
@@ -754,9 +754,9 @@ static ext3_fsblk_t get_sb_block(void **data)
 
 static int parse_options (char *options, struct super_block *sb,
 			  unsigned int *inum, unsigned long *journal_devnum,
-			  ext3_fsblk_t *n_blocks_count, int is_remount)
+			  ext4_fsblk_t *n_blocks_count, int is_remount)
 {
-	struct ext3_sb_info *sbi = EXT3_SB(sb);
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	char * p;
 	substring_t args[MAX_OPT_ARGS];
 	int data_opt = 0;
@@ -832,7 +832,7 @@ static int parse_options (char *options, struct super_block *sb,
 		case Opt_orlov:
 			clear_opt (sbi->s_mount_opt, OLDALLOC);
 			break;
-#ifdef CONFIG_EXT3_FS_XATTR
+#ifdef CONFIG_EXT4DEV_FS_XATTR
 		case Opt_user_xattr:
 			set_opt (sbi->s_mount_opt, XATTR_USER);
 			break;
@@ -842,10 +842,10 @@ static int parse_options (char *options, struct super_block *sb,
 #else
 		case Opt_user_xattr:
 		case Opt_nouser_xattr:
-			printk("EXT3 (no)user_xattr options not supported\n");
+			printk("EXT4 (no)user_xattr options not supported\n");
 			break;
 #endif
-#ifdef CONFIG_EXT3_FS_POSIX_ACL
+#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
 		case Opt_acl:
 			set_opt(sbi->s_mount_opt, POSIX_ACL);
 			break;
@@ -855,7 +855,7 @@ static int parse_options (char *options, struct super_block *sb,
 #else
 		case Opt_acl:
 		case Opt_noacl:
-			printk("EXT3 (no)acl options not supported\n");
+			printk("EXT4 (no)acl options not supported\n");
 			break;
 #endif
 		case Opt_reservation:
@@ -871,7 +871,7 @@ static int parse_options (char *options, struct super_block *sb,
 			   user to specify an existing inode to be the
 			   journal file. */
 			if (is_remount) {
-				printk(KERN_ERR "EXT3-fs: cannot specify "
+				printk(KERN_ERR "EXT4-fs: cannot specify "
 				       "journal on remount\n");
 				return 0;
 			}
@@ -879,7 +879,7 @@ static int parse_options (char *options, struct super_block *sb,
 			break;
 		case Opt_journal_inum:
 			if (is_remount) {
-				printk(KERN_ERR "EXT3-fs: cannot specify "
+				printk(KERN_ERR "EXT4-fs: cannot specify "
 				       "journal on remount\n");
 				return 0;
 			}
@@ -889,7 +889,7 @@ static int parse_options (char *options, struct super_block *sb,
 			break;
 		case Opt_journal_dev:
 			if (is_remount) {
-				printk(KERN_ERR "EXT3-fs: cannot specify "
+				printk(KERN_ERR "EXT4-fs: cannot specify "
 				       "journal on remount\n");
 				return 0;
 			}
@@ -910,24 +910,24 @@ static int parse_options (char *options, struct super_block *sb,
 			sbi->s_commit_interval = HZ * option;
 			break;
 		case Opt_data_journal:
-			data_opt = EXT3_MOUNT_JOURNAL_DATA;
+			data_opt = EXT4_MOUNT_JOURNAL_DATA;
 			goto datacheck;
 		case Opt_data_ordered:
-			data_opt = EXT3_MOUNT_ORDERED_DATA;
+			data_opt = EXT4_MOUNT_ORDERED_DATA;
 			goto datacheck;
 		case Opt_data_writeback:
-			data_opt = EXT3_MOUNT_WRITEBACK_DATA;
+			data_opt = EXT4_MOUNT_WRITEBACK_DATA;
 		datacheck:
 			if (is_remount) {
-				if ((sbi->s_mount_opt & EXT3_MOUNT_DATA_FLAGS)
+				if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS)
 						!= data_opt) {
 					printk(KERN_ERR
-						"EXT3-fs: cannot change data "
+						"EXT4-fs: cannot change data "
 						"mode on remount\n");
 					return 0;
 				}
 			} else {
-				sbi->s_mount_opt &= ~EXT3_MOUNT_DATA_FLAGS;
+				sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS;
 				sbi->s_mount_opt |= data_opt;
 			}
 			break;
@@ -940,21 +940,21 @@ static int parse_options (char *options, struct super_block *sb,
 set_qf_name:
 			if (sb_any_quota_enabled(sb)) {
 				printk(KERN_ERR
-					"EXT3-fs: Cannot change journalled "
+					"EXT4-fs: Cannot change journalled "
 					"quota options when quota turned on.\n");
 				return 0;
 			}
 			qname = match_strdup(&args[0]);
 			if (!qname) {
 				printk(KERN_ERR
-					"EXT3-fs: not enough memory for "
+					"EXT4-fs: not enough memory for "
 					"storing quotafile name.\n");
 				return 0;
 			}
 			if (sbi->s_qf_names[qtype] &&
 			    strcmp(sbi->s_qf_names[qtype], qname)) {
 				printk(KERN_ERR
-					"EXT3-fs: %s quota file already "
+					"EXT4-fs: %s quota file already "
 					"specified.\n", QTYPE2NAME(qtype));
 				kfree(qname);
 				return 0;
@@ -962,7 +962,7 @@ set_qf_name:
 			sbi->s_qf_names[qtype] = qname;
 			if (strchr(sbi->s_qf_names[qtype], '/')) {
 				printk(KERN_ERR
-					"EXT3-fs: quotafile must be on "
+					"EXT4-fs: quotafile must be on "
 					"filesystem root.\n");
 				kfree(sbi->s_qf_names[qtype]);
 				sbi->s_qf_names[qtype] = NULL;
@@ -977,7 +977,7 @@ set_qf_name:
 			qtype = GRPQUOTA;
 clear_qf_name:
 			if (sb_any_quota_enabled(sb)) {
-				printk(KERN_ERR "EXT3-fs: Cannot change "
+				printk(KERN_ERR "EXT4-fs: Cannot change "
 					"journalled quota options when "
 					"quota turned on.\n");
 				return 0;
@@ -1005,7 +1005,7 @@ clear_qf_name:
 			break;
 		case Opt_noquota:
 			if (sb_any_quota_enabled(sb)) {
-				printk(KERN_ERR "EXT3-fs: Cannot change quota "
+				printk(KERN_ERR "EXT4-fs: Cannot change quota "
 					"options when quota turned on.\n");
 				return 0;
 			}
@@ -1024,7 +1024,7 @@ clear_qf_name:
 		case Opt_jqfmt_vfsold:
 		case Opt_jqfmt_vfsv0:
 			printk(KERN_ERR
-				"EXT3-fs: journalled quota options not "
+				"EXT4-fs: journalled quota options not "
 				"supported.\n");
 			break;
 		case Opt_noquota:
@@ -1045,7 +1045,7 @@ clear_qf_name:
 			break;
 		case Opt_resize:
 			if (!is_remount) {
-				printk("EXT3-fs: resize option only available "
+				printk("EXT4-fs: resize option only available "
 					"for remount\n");
 				return 0;
 			}
@@ -1061,38 +1061,38 @@ clear_qf_name:
 			break;
 		default:
 			printk (KERN_ERR
-				"EXT3-fs: Unrecognized mount option \"%s\" "
+				"EXT4-fs: Unrecognized mount option \"%s\" "
 				"or missing value\n", p);
 			return 0;
 		}
 	}
 #ifdef CONFIG_QUOTA
 	if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
-		if ((sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA) &&
+		if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) &&
 		     sbi->s_qf_names[USRQUOTA])
 			clear_opt(sbi->s_mount_opt, USRQUOTA);
 
-		if ((sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) &&
+		if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) &&
 		     sbi->s_qf_names[GRPQUOTA])
 			clear_opt(sbi->s_mount_opt, GRPQUOTA);
 
 		if ((sbi->s_qf_names[USRQUOTA] &&
-				(sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)) ||
+				(sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) ||
 		    (sbi->s_qf_names[GRPQUOTA] &&
-				(sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA))) {
-			printk(KERN_ERR "EXT3-fs: old and new quota "
+				(sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) {
+			printk(KERN_ERR "EXT4-fs: old and new quota "
 					"format mixing.\n");
 			return 0;
 		}
 
 		if (!sbi->s_jquota_fmt) {
-			printk(KERN_ERR "EXT3-fs: journalled quota format "
+			printk(KERN_ERR "EXT4-fs: journalled quota format "
 					"not specified.\n");
 			return 0;
 		}
 	} else {
 		if (sbi->s_jquota_fmt) {
-			printk(KERN_ERR "EXT3-fs: journalled quota format "
+			printk(KERN_ERR "EXT4-fs: journalled quota format "
 					"specified with no journalling "
 					"enabled.\n");
 			return 0;
@@ -1102,68 +1102,68 @@ clear_qf_name:
 	return 1;
 }
 
-static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es,
+static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es,
 			    int read_only)
 {
-	struct ext3_sb_info *sbi = EXT3_SB(sb);
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	int res = 0;
 
-	if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) {
-		printk (KERN_ERR "EXT3-fs warning: revision level too high, "
+	if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) {
+		printk (KERN_ERR "EXT4-fs warning: revision level too high, "
 			"forcing read-only mode\n");
 		res = MS_RDONLY;
 	}
 	if (read_only)
 		return res;
-	if (!(sbi->s_mount_state & EXT3_VALID_FS))
-		printk (KERN_WARNING "EXT3-fs warning: mounting unchecked fs, "
+	if (!(sbi->s_mount_state & EXT4_VALID_FS))
+		printk (KERN_WARNING "EXT4-fs warning: mounting unchecked fs, "
 			"running e2fsck is recommended\n");
-	else if ((sbi->s_mount_state & EXT3_ERROR_FS))
+	else if ((sbi->s_mount_state & EXT4_ERROR_FS))
 		printk (KERN_WARNING
-			"EXT3-fs warning: mounting fs with errors, "
+			"EXT4-fs warning: mounting fs with errors, "
 			"running e2fsck is recommended\n");
 	else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 &&
 		 le16_to_cpu(es->s_mnt_count) >=
 		 (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count))
 		printk (KERN_WARNING
-			"EXT3-fs warning: maximal mount count reached, "
+			"EXT4-fs warning: maximal mount count reached, "
 			"running e2fsck is recommended\n");
 	else if (le32_to_cpu(es->s_checkinterval) &&
 		(le32_to_cpu(es->s_lastcheck) +
 			le32_to_cpu(es->s_checkinterval) <= get_seconds()))
 		printk (KERN_WARNING
-			"EXT3-fs warning: checktime reached, "
+			"EXT4-fs warning: checktime reached, "
 			"running e2fsck is recommended\n");
 #if 0
 		/* @@@ We _will_ want to clear the valid bit if we find
                    inconsistencies, to force a fsck at reboot.  But for
                    a plain journaled filesystem we can keep it set as
                    valid forever! :) */
-	es->s_state = cpu_to_le16(le16_to_cpu(es->s_state) & ~EXT3_VALID_FS);
+	es->s_state = cpu_to_le16(le16_to_cpu(es->s_state) & ~EXT4_VALID_FS);
 #endif
 	if (!(__s16) le16_to_cpu(es->s_max_mnt_count))
-		es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT);
+		es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT);
 	es->s_mnt_count=cpu_to_le16(le16_to_cpu(es->s_mnt_count) + 1);
 	es->s_mtime = cpu_to_le32(get_seconds());
-	ext3_update_dynamic_rev(sb);
-	EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
+	ext4_update_dynamic_rev(sb);
+	EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
 
-	ext3_commit_super(sb, es, 1);
+	ext4_commit_super(sb, es, 1);
 	if (test_opt(sb, DEBUG))
-		printk(KERN_INFO "[EXT3 FS bs=%lu, gc=%lu, "
+		printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%lu, "
 				"bpg=%lu, ipg=%lu, mo=%04lx]\n",
 			sb->s_blocksize,
 			sbi->s_groups_count,
-			EXT3_BLOCKS_PER_GROUP(sb),
-			EXT3_INODES_PER_GROUP(sb),
+			EXT4_BLOCKS_PER_GROUP(sb),
+			EXT4_INODES_PER_GROUP(sb),
 			sbi->s_mount_opt);
 
-	printk(KERN_INFO "EXT3 FS on %s, ", sb->s_id);
-	if (EXT3_SB(sb)->s_journal->j_inode == NULL) {
+	printk(KERN_INFO "EXT4 FS on %s, ", sb->s_id);
+	if (EXT4_SB(sb)->s_journal->j_inode == NULL) {
 		char b[BDEVNAME_SIZE];
 
 		printk("external journal on %s\n",
-			bdevname(EXT3_SB(sb)->s_journal->j_dev, b));
+			bdevname(EXT4_SB(sb)->s_journal->j_dev, b));
 	} else {
 		printk("internal journal\n");
 	}
@@ -1171,16 +1171,16 @@ static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es,
 }
 
 /* Called at mount-time, super-block is locked */
-static int ext3_check_descriptors (struct super_block * sb)
+static int ext4_check_descriptors (struct super_block * sb)
 {
-	struct ext3_sb_info *sbi = EXT3_SB(sb);
-	ext3_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block);
-	ext3_fsblk_t last_block;
-	struct ext3_group_desc * gdp = NULL;
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block);
+	ext4_fsblk_t last_block;
+	struct ext4_group_desc * gdp = NULL;
 	int desc_block = 0;
 	int i;
 
-	ext3_debug ("Checking group descriptors");
+	ext4_debug ("Checking group descriptors");
 
 	for (i = 0; i < sbi->s_groups_count; i++)
 	{
@@ -1188,15 +1188,15 @@ static int ext3_check_descriptors (struct super_block * sb)
 			last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
 		else
 			last_block = first_block +
-				(EXT3_BLOCKS_PER_GROUP(sb) - 1);
+				(EXT4_BLOCKS_PER_GROUP(sb) - 1);
 
-		if ((i % EXT3_DESC_PER_BLOCK(sb)) == 0)
-			gdp = (struct ext3_group_desc *)
+		if ((i % EXT4_DESC_PER_BLOCK(sb)) == 0)
+			gdp = (struct ext4_group_desc *)
 					sbi->s_group_desc[desc_block++]->b_data;
 		if (le32_to_cpu(gdp->bg_block_bitmap) < first_block ||
 		    le32_to_cpu(gdp->bg_block_bitmap) > last_block)
 		{
-			ext3_error (sb, "ext3_check_descriptors",
+			ext4_error (sb, "ext4_check_descriptors",
 				    "Block bitmap for group %d"
 				    " not in group (block %lu)!",
 				    i, (unsigned long)
@@ -1206,7 +1206,7 @@ static int ext3_check_descriptors (struct super_block * sb)
 		if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block ||
 		    le32_to_cpu(gdp->bg_inode_bitmap) > last_block)
 		{
-			ext3_error (sb, "ext3_check_descriptors",
+			ext4_error (sb, "ext4_check_descriptors",
 				    "Inode bitmap for group %d"
 				    " not in group (block %lu)!",
 				    i, (unsigned long)
@@ -1217,24 +1217,24 @@ static int ext3_check_descriptors (struct super_block * sb)
 		    le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group >
 		    last_block)
 		{
-			ext3_error (sb, "ext3_check_descriptors",
+			ext4_error (sb, "ext4_check_descriptors",
 				    "Inode table for group %d"
 				    " not in group (block %lu)!",
 				    i, (unsigned long)
 					le32_to_cpu(gdp->bg_inode_table));
 			return 0;
 		}
-		first_block += EXT3_BLOCKS_PER_GROUP(sb);
+		first_block += EXT4_BLOCKS_PER_GROUP(sb);
 		gdp++;
 	}
 
-	sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb));
-	sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb));
+	sbi->s_es->s_free_blocks_count=cpu_to_le32(ext4_count_free_blocks(sb));
+	sbi->s_es->s_free_inodes_count=cpu_to_le32(ext4_count_free_inodes(sb));
 	return 1;
 }
 
 
-/* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
+/* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at
  * the superblock) which were deleted from all directories, but held open by
  * a process at the time of a crash.  We walk the list and try to delete these
  * inodes at recovery time (only with a read-write filesystem).
@@ -1247,12 +1247,12 @@ static int ext3_check_descriptors (struct super_block * sb)
  * We only do an iget() and an iput() on each inode, which is very safe if we
  * accidentally point at an in-use or already deleted inode.  The worst that
  * can happen in this case is that we get a "bit already cleared" message from
- * ext3_free_inode().  The only reason we would point at a wrong inode is if
+ * ext4_free_inode().  The only reason we would point at a wrong inode is if
  * e2fsck was run on this filesystem, and it must have already done the orphan
  * inode cleanup for us, so we can safely abort without any further action.
  */
-static void ext3_orphan_cleanup (struct super_block * sb,
-				 struct ext3_super_block * es)
+static void ext4_orphan_cleanup (struct super_block * sb,
+				 struct ext4_super_block * es)
 {
 	unsigned int s_flags = sb->s_flags;
 	int nr_orphans = 0, nr_truncates = 0;
@@ -1264,7 +1264,7 @@ static void ext3_orphan_cleanup (struct super_block * sb,
 		return;
 	}
 
-	if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) {
+	if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) {
 		if (es->s_last_orphan)
 			jbd_debug(1, "Errors on filesystem, "
 				  "clearing orphan list.\n");
@@ -1274,7 +1274,7 @@ static void ext3_orphan_cleanup (struct super_block * sb,
 	}
 
 	if (s_flags & MS_RDONLY) {
-		printk(KERN_INFO "EXT3-fs: %s: orphan cleanup on readonly fs\n",
+		printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n",
 		       sb->s_id);
 		sb->s_flags &= ~MS_RDONLY;
 	}
@@ -1283,11 +1283,11 @@ static void ext3_orphan_cleanup (struct super_block * sb,
 	sb->s_flags |= MS_ACTIVE;
 	/* Turn on quotas so that they are updated correctly */
 	for (i = 0; i < MAXQUOTAS; i++) {
-		if (EXT3_SB(sb)->s_qf_names[i]) {
-			int ret = ext3_quota_on_mount(sb, i);
+		if (EXT4_SB(sb)->s_qf_names[i]) {
+			int ret = ext4_quota_on_mount(sb, i);
 			if (ret < 0)
 				printk(KERN_ERR
-					"EXT3-fs: Cannot turn on journalled "
+					"EXT4-fs: Cannot turn on journalled "
 					"quota: error %d\n", ret);
 		}
 	}
@@ -1297,12 +1297,12 @@ static void ext3_orphan_cleanup (struct super_block * sb,
 		struct inode *inode;
 
 		if (!(inode =
-		      ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan)))) {
+		      ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)))) {
 			es->s_last_orphan = 0;
 			break;
 		}
 
-		list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan);
+		list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan);
 		DQUOT_INIT(inode);
 		if (inode->i_nlink) {
 			printk(KERN_DEBUG
@@ -1310,7 +1310,7 @@ static void ext3_orphan_cleanup (struct super_block * sb,
 				__FUNCTION__, inode->i_ino, inode->i_size);
 			jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
 				  inode->i_ino, inode->i_size);
-			ext3_truncate(inode);
+			ext4_truncate(inode);
 			nr_truncates++;
 		} else {
 			printk(KERN_DEBUG
@@ -1326,10 +1326,10 @@ static void ext3_orphan_cleanup (struct super_block * sb,
 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
 
 	if (nr_orphans)
-		printk(KERN_INFO "EXT3-fs: %s: %d orphan inode%s deleted\n",
+		printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n",
 		       sb->s_id, PLURAL(nr_orphans));
 	if (nr_truncates)
-		printk(KERN_INFO "EXT3-fs: %s: %d truncate%s cleaned up\n",
+		printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n",
 		       sb->s_id, PLURAL(nr_truncates));
 #ifdef CONFIG_QUOTA
 	/* Turn quotas off */
@@ -1348,9 +1348,9 @@ static void ext3_orphan_cleanup (struct super_block * sb,
  * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
  * We need to be 1 filesystem block less than the 2^32 sector limit.
  */
-static loff_t ext3_max_size(int bits)
+static loff_t ext4_max_size(int bits)
 {
-	loff_t res = EXT3_NDIR_BLOCKS;
+	loff_t res = EXT4_NDIR_BLOCKS;
 	/* This constant is calculated to be the largest file size for a
 	 * dense, 4k-blocksize file such that the total number of
 	 * sectors in the file, including data and all indirect blocks,
@@ -1366,34 +1366,34 @@ static loff_t ext3_max_size(int bits)
 	return res;
 }
 
-static ext3_fsblk_t descriptor_loc(struct super_block *sb,
-				    ext3_fsblk_t logic_sb_block,
+static ext4_fsblk_t descriptor_loc(struct super_block *sb,
+				    ext4_fsblk_t logic_sb_block,
 				    int nr)
 {
-	struct ext3_sb_info *sbi = EXT3_SB(sb);
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	unsigned long bg, first_meta_bg;
 	int has_super = 0;
 
 	first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);
 
-	if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) ||
+	if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) ||
 	    nr < first_meta_bg)
 		return (logic_sb_block + nr + 1);
 	bg = sbi->s_desc_per_block * nr;
-	if (ext3_bg_has_super(sb, bg))
+	if (ext4_bg_has_super(sb, bg))
 		has_super = 1;
-	return (has_super + ext3_group_first_block_no(sb, bg));
+	return (has_super + ext4_group_first_block_no(sb, bg));
 }
 
 
-static int ext3_fill_super (struct super_block *sb, void *data, int silent)
+static int ext4_fill_super (struct super_block *sb, void *data, int silent)
 {
 	struct buffer_head * bh;
-	struct ext3_super_block *es = NULL;
-	struct ext3_sb_info *sbi;
-	ext3_fsblk_t block;
-	ext3_fsblk_t sb_block = get_sb_block(&data);
-	ext3_fsblk_t logic_sb_block;
+	struct ext4_super_block *es = NULL;
+	struct ext4_sb_info *sbi;
+	ext4_fsblk_t block;
+	ext4_fsblk_t sb_block = get_sb_block(&data);
+	ext4_fsblk_t logic_sb_block;
 	unsigned long offset = 0;
 	unsigned int journal_inum = 0;
 	unsigned long journal_devnum = 0;
@@ -1411,64 +1411,64 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 		return -ENOMEM;
 	sb->s_fs_info = sbi;
 	sbi->s_mount_opt = 0;
-	sbi->s_resuid = EXT3_DEF_RESUID;
-	sbi->s_resgid = EXT3_DEF_RESGID;
+	sbi->s_resuid = EXT4_DEF_RESUID;
+	sbi->s_resgid = EXT4_DEF_RESGID;
 
 	unlock_kernel();
 
-	blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE);
+	blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE);
 	if (!blocksize) {
-		printk(KERN_ERR "EXT3-fs: unable to set blocksize\n");
+		printk(KERN_ERR "EXT4-fs: unable to set blocksize\n");
 		goto out_fail;
 	}
 
 	/*
-	 * The ext3 superblock will not be buffer aligned for other than 1kB
+	 * The ext4 superblock will not be buffer aligned for other than 1kB
 	 * block sizes.  We need to calculate the offset from buffer start.
 	 */
-	if (blocksize != EXT3_MIN_BLOCK_SIZE) {
-		logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
-		offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
+	if (blocksize != EXT4_MIN_BLOCK_SIZE) {
+		logic_sb_block = (sb_block * EXT4_MIN_BLOCK_SIZE) / blocksize;
+		offset = (sb_block * EXT4_MIN_BLOCK_SIZE) % blocksize;
 	} else {
 		logic_sb_block = sb_block;
 	}
 
 	if (!(bh = sb_bread(sb, logic_sb_block))) {
-		printk (KERN_ERR "EXT3-fs: unable to read superblock\n");
+		printk (KERN_ERR "EXT4-fs: unable to read superblock\n");
 		goto out_fail;
 	}
 	/*
 	 * Note: s_es must be initialized as soon as possible because
-	 *       some ext3 macro-instructions depend on its value
+	 *       some ext4 macro-instructions depend on its value
 	 */
-	es = (struct ext3_super_block *) (((char *)bh->b_data) + offset);
+	es = (struct ext4_super_block *) (((char *)bh->b_data) + offset);
 	sbi->s_es = es;
 	sb->s_magic = le16_to_cpu(es->s_magic);
-	if (sb->s_magic != EXT3_SUPER_MAGIC)
-		goto cantfind_ext3;
+	if (sb->s_magic != EXT4_SUPER_MAGIC)
+		goto cantfind_ext4;
 
 	/* Set defaults before we parse the mount options */
 	def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
-	if (def_mount_opts & EXT3_DEFM_DEBUG)
+	if (def_mount_opts & EXT4_DEFM_DEBUG)
 		set_opt(sbi->s_mount_opt, DEBUG);
-	if (def_mount_opts & EXT3_DEFM_BSDGROUPS)
+	if (def_mount_opts & EXT4_DEFM_BSDGROUPS)
 		set_opt(sbi->s_mount_opt, GRPID);
-	if (def_mount_opts & EXT3_DEFM_UID16)
+	if (def_mount_opts & EXT4_DEFM_UID16)
 		set_opt(sbi->s_mount_opt, NO_UID32);
-	if (def_mount_opts & EXT3_DEFM_XATTR_USER)
+	if (def_mount_opts & EXT4_DEFM_XATTR_USER)
 		set_opt(sbi->s_mount_opt, XATTR_USER);
-	if (def_mount_opts & EXT3_DEFM_ACL)
+	if (def_mount_opts & EXT4_DEFM_ACL)
 		set_opt(sbi->s_mount_opt, POSIX_ACL);
-	if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA)
-		sbi->s_mount_opt |= EXT3_MOUNT_JOURNAL_DATA;
-	else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED)
-		sbi->s_mount_opt |= EXT3_MOUNT_ORDERED_DATA;
-	else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK)
-		sbi->s_mount_opt |= EXT3_MOUNT_WRITEBACK_DATA;
-
-	if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC)
+	if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA)
+		sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA;
+	else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED)
+		sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA;
+	else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK)
+		sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA;
+
+	if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC)
 		set_opt(sbi->s_mount_opt, ERRORS_PANIC);
-	else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_RO)
+	else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_RO)
 		set_opt(sbi->s_mount_opt, ERRORS_RO);
 
 	sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
@@ -1481,40 +1481,40 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 		goto failed_mount;
 
 	sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
-		((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
+		((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
 
-	if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV &&
-	    (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) ||
-	     EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
-	     EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U)))
+	if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV &&
+	    (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) ||
+	     EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
+	     EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U)))
 		printk(KERN_WARNING
-		       "EXT3-fs warning: feature flags set on rev 0 fs, "
+		       "EXT4-fs warning: feature flags set on rev 0 fs, "
 		       "running e2fsck is recommended\n");
 	/*
 	 * Check feature flags regardless of the revision level, since we
 	 * previously didn't change the revision level when setting the flags,
 	 * so there is a chance incompat flags are set on a rev 0 filesystem.
 	 */
-	features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP);
+	features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP);
 	if (features) {
-		printk(KERN_ERR "EXT3-fs: %s: couldn't mount because of "
+		printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of "
 		       "unsupported optional features (%x).\n",
 		       sb->s_id, le32_to_cpu(features));
 		goto failed_mount;
 	}
-	features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP);
+	features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP);
 	if (!(sb->s_flags & MS_RDONLY) && features) {
-		printk(KERN_ERR "EXT3-fs: %s: couldn't mount RDWR because of "
+		printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of "
 		       "unsupported optional features (%x).\n",
 		       sb->s_id, le32_to_cpu(features));
 		goto failed_mount;
 	}
 	blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);
 
-	if (blocksize < EXT3_MIN_BLOCK_SIZE ||
-	    blocksize > EXT3_MAX_BLOCK_SIZE) {
+	if (blocksize < EXT4_MIN_BLOCK_SIZE ||
+	    blocksize > EXT4_MAX_BLOCK_SIZE) {
 		printk(KERN_ERR
-		       "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n",
+		       "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n",
 		       blocksize, sb->s_id);
 		goto failed_mount;
 	}
@@ -1526,52 +1526,52 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 		 * than the hardware sectorsize for the machine.
 		 */
 		if (blocksize < hblock) {
-			printk(KERN_ERR "EXT3-fs: blocksize %d too small for "
+			printk(KERN_ERR "EXT4-fs: blocksize %d too small for "
 			       "device blocksize %d.\n", blocksize, hblock);
 			goto failed_mount;
 		}
 
 		brelse (bh);
 		sb_set_blocksize(sb, blocksize);
-		logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
-		offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
+		logic_sb_block = (sb_block * EXT4_MIN_BLOCK_SIZE) / blocksize;
+		offset = (sb_block * EXT4_MIN_BLOCK_SIZE) % blocksize;
 		bh = sb_bread(sb, logic_sb_block);
 		if (!bh) {
 			printk(KERN_ERR
-			       "EXT3-fs: Can't read superblock on 2nd try.\n");
+			       "EXT4-fs: Can't read superblock on 2nd try.\n");
 			goto failed_mount;
 		}
-		es = (struct ext3_super_block *)(((char *)bh->b_data) + offset);
+		es = (struct ext4_super_block *)(((char *)bh->b_data) + offset);
 		sbi->s_es = es;
-		if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) {
+		if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) {
 			printk (KERN_ERR
-				"EXT3-fs: Magic mismatch, very weird !\n");
+				"EXT4-fs: Magic mismatch, very weird !\n");
 			goto failed_mount;
 		}
 	}
 
-	sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits);
+	sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits);
 
-	if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) {
-		sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE;
-		sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO;
+	if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) {
+		sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE;
+		sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO;
 	} else {
 		sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
 		sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
-		if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) ||
+		if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) ||
 		    (sbi->s_inode_size & (sbi->s_inode_size - 1)) ||
 		    (sbi->s_inode_size > blocksize)) {
 			printk (KERN_ERR
-				"EXT3-fs: unsupported inode size: %d\n",
+				"EXT4-fs: unsupported inode size: %d\n",
 				sbi->s_inode_size);
 			goto failed_mount;
 		}
 	}
-	sbi->s_frag_size = EXT3_MIN_FRAG_SIZE <<
+	sbi->s_frag_size = EXT4_MIN_FRAG_SIZE <<
 				   le32_to_cpu(es->s_log_frag_size);
 	if (blocksize != sbi->s_frag_size) {
 		printk(KERN_ERR
-		       "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n",
+		       "EXT4-fs: fragsize %lu != blocksize %u (unsupported)\n",
 		       sbi->s_frag_size, blocksize);
 		goto failed_mount;
 	}
@@ -1579,62 +1579,62 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 	sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);
 	sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group);
 	sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
-	if (EXT3_INODE_SIZE(sb) == 0)
-		goto cantfind_ext3;
-	sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb);
+	if (EXT4_INODE_SIZE(sb) == 0)
+		goto cantfind_ext4;
+	sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb);
 	if (sbi->s_inodes_per_block == 0)
-		goto cantfind_ext3;
+		goto cantfind_ext4;
 	sbi->s_itb_per_group = sbi->s_inodes_per_group /
 					sbi->s_inodes_per_block;
-	sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc);
+	sbi->s_desc_per_block = blocksize / sizeof(struct ext4_group_desc);
 	sbi->s_sbh = bh;
 	sbi->s_mount_state = le16_to_cpu(es->s_state);
-	sbi->s_addr_per_block_bits = log2(EXT3_ADDR_PER_BLOCK(sb));
-	sbi->s_desc_per_block_bits = log2(EXT3_DESC_PER_BLOCK(sb));
+	sbi->s_addr_per_block_bits = log2(EXT4_ADDR_PER_BLOCK(sb));
+	sbi->s_desc_per_block_bits = log2(EXT4_DESC_PER_BLOCK(sb));
 	for (i=0; i < 4; i++)
 		sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);
 	sbi->s_def_hash_version = es->s_def_hash_version;
 
 	if (sbi->s_blocks_per_group > blocksize * 8) {
 		printk (KERN_ERR
-			"EXT3-fs: #blocks per group too big: %lu\n",
+			"EXT4-fs: #blocks per group too big: %lu\n",
 			sbi->s_blocks_per_group);
 		goto failed_mount;
 	}
 	if (sbi->s_frags_per_group > blocksize * 8) {
 		printk (KERN_ERR
-			"EXT3-fs: #fragments per group too big: %lu\n",
+			"EXT4-fs: #fragments per group too big: %lu\n",
 			sbi->s_frags_per_group);
 		goto failed_mount;
 	}
 	if (sbi->s_inodes_per_group > blocksize * 8) {
 		printk (KERN_ERR
-			"EXT3-fs: #inodes per group too big: %lu\n",
+			"EXT4-fs: #inodes per group too big: %lu\n",
 			sbi->s_inodes_per_group);
 		goto failed_mount;
 	}
 
 	if (le32_to_cpu(es->s_blocks_count) >
 		    (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) {
-		printk(KERN_ERR "EXT3-fs: filesystem on %s:"
+		printk(KERN_ERR "EXT4-fs: filesystem on %s:"
 			" too large to mount safely\n", sb->s_id);
 		if (sizeof(sector_t) < 8)
-			printk(KERN_WARNING "EXT3-fs: CONFIG_LBD not "
+			printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not "
 					"enabled\n");
 		goto failed_mount;
 	}
 
-	if (EXT3_BLOCKS_PER_GROUP(sb) == 0)
-		goto cantfind_ext3;
+	if (EXT4_BLOCKS_PER_GROUP(sb) == 0)
+		goto cantfind_ext4;
 	sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
 			       le32_to_cpu(es->s_first_data_block) - 1)
-				       / EXT3_BLOCKS_PER_GROUP(sb)) + 1;
-	db_count = (sbi->s_groups_count + EXT3_DESC_PER_BLOCK(sb) - 1) /
-		   EXT3_DESC_PER_BLOCK(sb);
+				       / EXT4_BLOCKS_PER_GROUP(sb)) + 1;
+	db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) /
+		   EXT4_DESC_PER_BLOCK(sb);
 	sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *),
 				    GFP_KERNEL);
 	if (sbi->s_group_desc == NULL) {
-		printk (KERN_ERR "EXT3-fs: not enough memory\n");
+		printk (KERN_ERR "EXT4-fs: not enough memory\n");
 		goto failed_mount;
 	}
 
@@ -1644,14 +1644,14 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 		block = descriptor_loc(sb, logic_sb_block, i);
 		sbi->s_group_desc[i] = sb_bread(sb, block);
 		if (!sbi->s_group_desc[i]) {
-			printk (KERN_ERR "EXT3-fs: "
+			printk (KERN_ERR "EXT4-fs: "
 				"can't read group descriptor %d\n", i);
 			db_count = i;
 			goto failed_mount2;
 		}
 	}
-	if (!ext3_check_descriptors (sb)) {
-		printk(KERN_ERR "EXT3-fs: group descriptors corrupted!\n");
+	if (!ext4_check_descriptors (sb)) {
+		printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n");
 		goto failed_mount2;
 	}
 	sbi->s_gdb_count = db_count;
@@ -1659,11 +1659,11 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 	spin_lock_init(&sbi->s_next_gen_lock);
 
 	percpu_counter_init(&sbi->s_freeblocks_counter,
-		ext3_count_free_blocks(sb));
+		ext4_count_free_blocks(sb));
 	percpu_counter_init(&sbi->s_freeinodes_counter,
-		ext3_count_free_inodes(sb));
+		ext4_count_free_inodes(sb));
 	percpu_counter_init(&sbi->s_dirs_counter,
-		ext3_count_dirs(sb));
+		ext4_count_dirs(sb));
 
 	/* per fileystem reservation list head & lock */
 	spin_lock_init(&sbi->s_rsv_window_lock);
@@ -1672,45 +1672,45 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 	 * reservation window list --- it gives us a placeholder for
 	 * append-at-start-of-list which makes the allocation logic
 	 * _much_ simpler. */
-	sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
-	sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
+	sbi->s_rsv_window_head.rsv_start = EXT4_RESERVE_WINDOW_NOT_ALLOCATED;
+	sbi->s_rsv_window_head.rsv_end = EXT4_RESERVE_WINDOW_NOT_ALLOCATED;
 	sbi->s_rsv_window_head.rsv_alloc_hit = 0;
 	sbi->s_rsv_window_head.rsv_goal_size = 0;
-	ext3_rsv_window_add(sb, &sbi->s_rsv_window_head);
+	ext4_rsv_window_add(sb, &sbi->s_rsv_window_head);
 
 	/*
 	 * set up enough so that it can read an inode
 	 */
-	sb->s_op = &ext3_sops;
-	sb->s_export_op = &ext3_export_ops;
-	sb->s_xattr = ext3_xattr_handlers;
+	sb->s_op = &ext4_sops;
+	sb->s_export_op = &ext4_export_ops;
+	sb->s_xattr = ext4_xattr_handlers;
 #ifdef CONFIG_QUOTA
-	sb->s_qcop = &ext3_qctl_operations;
-	sb->dq_op = &ext3_quota_operations;
+	sb->s_qcop = &ext4_qctl_operations;
+	sb->dq_op = &ext4_quota_operations;
 #endif
 	INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
 
 	sb->s_root = NULL;
 
 	needs_recovery = (es->s_last_orphan != 0 ||
-			  EXT3_HAS_INCOMPAT_FEATURE(sb,
-				    EXT3_FEATURE_INCOMPAT_RECOVER));
+			  EXT4_HAS_INCOMPAT_FEATURE(sb,
+				    EXT4_FEATURE_INCOMPAT_RECOVER));
 
 	/*
 	 * The first inode we look at is the journal inode.  Don't try
 	 * root first: it may be modified in the journal!
 	 */
 	if (!test_opt(sb, NOLOAD) &&
-	    EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
-		if (ext3_load_journal(sb, es, journal_devnum))
+	    EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) {
+		if (ext4_load_journal(sb, es, journal_devnum))
 			goto failed_mount3;
 	} else if (journal_inum) {
-		if (ext3_create_journal(sb, es, journal_inum))
+		if (ext4_create_journal(sb, es, journal_inum))
 			goto failed_mount3;
 	} else {
 		if (!silent)
 			printk (KERN_ERR
-				"ext3: No journal on filesystem on %s\n",
+				"ext4: No journal on filesystem on %s\n",
 				sb->s_id);
 		goto failed_mount3;
 	}
@@ -1729,11 +1729,11 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 			set_opt(sbi->s_mount_opt, JOURNAL_DATA);
 		break;
 
-	case EXT3_MOUNT_ORDERED_DATA:
-	case EXT3_MOUNT_WRITEBACK_DATA:
+	case EXT4_MOUNT_ORDERED_DATA:
+	case EXT4_MOUNT_WRITEBACK_DATA:
 		if (!journal_check_available_features
 		    (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) {
-			printk(KERN_ERR "EXT3-fs: Journal does not support "
+			printk(KERN_ERR "EXT4-fs: Journal does not support "
 			       "requested data journaling mode\n");
 			goto failed_mount4;
 		}
@@ -1742,8 +1742,8 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 	}
 
 	if (test_opt(sb, NOBH)) {
-		if (!(test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)) {
-			printk(KERN_WARNING "EXT3-fs: Ignoring nobh option - "
+		if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) {
+			printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - "
 				"its supported only with writeback mode\n");
 			clear_opt(sbi->s_mount_opt, NOBH);
 		}
@@ -1753,21 +1753,21 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 	 * so we can safely mount the rest of the filesystem now.
 	 */
 
-	root = iget(sb, EXT3_ROOT_INO);
+	root = iget(sb, EXT4_ROOT_INO);
 	sb->s_root = d_alloc_root(root);
 	if (!sb->s_root) {
-		printk(KERN_ERR "EXT3-fs: get root inode failed\n");
+		printk(KERN_ERR "EXT4-fs: get root inode failed\n");
 		iput(root);
 		goto failed_mount4;
 	}
 	if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
 		dput(sb->s_root);
 		sb->s_root = NULL;
-		printk(KERN_ERR "EXT3-fs: corrupt root inode, run e2fsck\n");
+		printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n");
 		goto failed_mount4;
 	}
 
-	ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY);
+	ext4_setup_super (sb, es, sb->s_flags & MS_RDONLY);
 	/*
 	 * akpm: core read_super() calls in here with the superblock locked.
 	 * That deadlocks, because orphan cleanup needs to lock the superblock
@@ -1776,23 +1776,23 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 	 * and aviro says that's the only reason for hanging onto the
 	 * superblock lock.
 	 */
-	EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS;
-	ext3_orphan_cleanup(sb, es);
-	EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS;
+	EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS;
+	ext4_orphan_cleanup(sb, es);
+	EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS;
 	if (needs_recovery)
-		printk (KERN_INFO "EXT3-fs: recovery complete.\n");
-	ext3_mark_recovery_complete(sb, es);
-	printk (KERN_INFO "EXT3-fs: mounted filesystem with %s data mode.\n",
-		test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal":
-		test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered":
+		printk (KERN_INFO "EXT4-fs: recovery complete.\n");
+	ext4_mark_recovery_complete(sb, es);
+	printk (KERN_INFO "EXT4-fs: mounted filesystem with %s data mode.\n",
+		test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ? "journal":
+		test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA ? "ordered":
 		"writeback");
 
 	lock_kernel();
 	return 0;
 
-cantfind_ext3:
+cantfind_ext4:
 	if (!silent)
-		printk(KERN_ERR "VFS: Can't find ext3 filesystem on dev %s.\n",
+		printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n",
 		       sb->s_id);
 	goto failed_mount;
 
@@ -1811,7 +1811,7 @@ failed_mount:
 	for (i = 0; i < MAXQUOTAS; i++)
 		kfree(sbi->s_qf_names[i]);
 #endif
-	ext3_blkdev_remove(sbi);
+	ext4_blkdev_remove(sbi);
 	brelse(bh);
 out_fail:
 	sb->s_fs_info = NULL;
@@ -1825,13 +1825,13 @@ out_fail:
  * initial mount, once the journal has been initialised but before we've
  * done any recovery; and again on any subsequent remount.
  */
-static void ext3_init_journal_params(struct super_block *sb, journal_t *journal)
+static void ext4_init_journal_params(struct super_block *sb, journal_t *journal)
 {
-	struct ext3_sb_info *sbi = EXT3_SB(sb);
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
 
 	if (sbi->s_commit_interval)
 		journal->j_commit_interval = sbi->s_commit_interval;
-	/* We could also set up an ext3-specific default for the commit
+	/* We could also set up an ext4-specific default for the commit
 	 * interval here, but for now we'll just fall back to the jbd
 	 * default. */
 
@@ -1843,7 +1843,7 @@ static void ext3_init_journal_params(struct super_block *sb, journal_t *journal)
 	spin_unlock(&journal->j_state_lock);
 }
 
-static journal_t *ext3_get_journal(struct super_block *sb,
+static journal_t *ext4_get_journal(struct super_block *sb,
 				   unsigned int journal_inum)
 {
 	struct inode *journal_inode;
@@ -1855,55 +1855,55 @@ static journal_t *ext3_get_journal(struct super_block *sb,
 
 	journal_inode = iget(sb, journal_inum);
 	if (!journal_inode) {
-		printk(KERN_ERR "EXT3-fs: no journal found.\n");
+		printk(KERN_ERR "EXT4-fs: no journal found.\n");
 		return NULL;
 	}
 	if (!journal_inode->i_nlink) {
 		make_bad_inode(journal_inode);
 		iput(journal_inode);
-		printk(KERN_ERR "EXT3-fs: journal inode is deleted.\n");
+		printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n");
 		return NULL;
 	}
 
 	jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
 		  journal_inode, journal_inode->i_size);
 	if (is_bad_inode(journal_inode) || !S_ISREG(journal_inode->i_mode)) {
-		printk(KERN_ERR "EXT3-fs: invalid journal inode.\n");
+		printk(KERN_ERR "EXT4-fs: invalid journal inode.\n");
 		iput(journal_inode);
 		return NULL;
 	}
 
 	journal = journal_init_inode(journal_inode);
 	if (!journal) {
-		printk(KERN_ERR "EXT3-fs: Could not load journal inode\n");
+		printk(KERN_ERR "EXT4-fs: Could not load journal inode\n");
 		iput(journal_inode);
 		return NULL;
 	}
 	journal->j_private = sb;
-	ext3_init_journal_params(sb, journal);
+	ext4_init_journal_params(sb, journal);
 	return journal;
 }
 
-static journal_t *ext3_get_dev_journal(struct super_block *sb,
+static journal_t *ext4_get_dev_journal(struct super_block *sb,
 				       dev_t j_dev)
 {
 	struct buffer_head * bh;
 	journal_t *journal;
-	ext3_fsblk_t start;
-	ext3_fsblk_t len;
+	ext4_fsblk_t start;
+	ext4_fsblk_t len;
 	int hblock, blocksize;
-	ext3_fsblk_t sb_block;
+	ext4_fsblk_t sb_block;
 	unsigned long offset;
-	struct ext3_super_block * es;
+	struct ext4_super_block * es;
 	struct block_device *bdev;
 
-	bdev = ext3_blkdev_get(j_dev);
+	bdev = ext4_blkdev_get(j_dev);
 	if (bdev == NULL)
 		return NULL;
 
 	if (bd_claim(bdev, sb)) {
 		printk(KERN_ERR
-		        "EXT3: failed to claim external journal device.\n");
+		        "EXT4: failed to claim external journal device.\n");
 		blkdev_put(bdev);
 		return NULL;
 	}
@@ -1912,31 +1912,31 @@ static journal_t *ext3_get_dev_journal(struct super_block *sb,
 	hblock = bdev_hardsect_size(bdev);
 	if (blocksize < hblock) {
 		printk(KERN_ERR
-			"EXT3-fs: blocksize too small for journal device.\n");
+			"EXT4-fs: blocksize too small for journal device.\n");
 		goto out_bdev;
 	}
 
-	sb_block = EXT3_MIN_BLOCK_SIZE / blocksize;
-	offset = EXT3_MIN_BLOCK_SIZE % blocksize;
+	sb_block = EXT4_MIN_BLOCK_SIZE / blocksize;
+	offset = EXT4_MIN_BLOCK_SIZE % blocksize;
 	set_blocksize(bdev, blocksize);
 	if (!(bh = __bread(bdev, sb_block, blocksize))) {
-		printk(KERN_ERR "EXT3-fs: couldn't read superblock of "
+		printk(KERN_ERR "EXT4-fs: couldn't read superblock of "
 		       "external journal\n");
 		goto out_bdev;
 	}
 
-	es = (struct ext3_super_block *) (((char *)bh->b_data) + offset);
-	if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) ||
+	es = (struct ext4_super_block *) (((char *)bh->b_data) + offset);
+	if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) ||
 	    !(le32_to_cpu(es->s_feature_incompat) &
-	      EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
-		printk(KERN_ERR "EXT3-fs: external journal has "
+	      EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) {
+		printk(KERN_ERR "EXT4-fs: external journal has "
 					"bad superblock\n");
 		brelse(bh);
 		goto out_bdev;
 	}
 
-	if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {
-		printk(KERN_ERR "EXT3-fs: journal UUID does not match\n");
+	if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {
+		printk(KERN_ERR "EXT4-fs: journal UUID does not match\n");
 		brelse(bh);
 		goto out_bdev;
 	}
@@ -1948,34 +1948,34 @@ static journal_t *ext3_get_dev_journal(struct super_block *sb,
 	journal = journal_init_dev(bdev, sb->s_bdev,
 					start, len, blocksize);
 	if (!journal) {
-		printk(KERN_ERR "EXT3-fs: failed to create device journal\n");
+		printk(KERN_ERR "EXT4-fs: failed to create device journal\n");
 		goto out_bdev;
 	}
 	journal->j_private = sb;
 	ll_rw_block(READ, 1, &journal->j_sb_buffer);
 	wait_on_buffer(journal->j_sb_buffer);
 	if (!buffer_uptodate(journal->j_sb_buffer)) {
-		printk(KERN_ERR "EXT3-fs: I/O error on journal device\n");
+		printk(KERN_ERR "EXT4-fs: I/O error on journal device\n");
 		goto out_journal;
 	}
 	if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) {
-		printk(KERN_ERR "EXT3-fs: External journal has more than one "
+		printk(KERN_ERR "EXT4-fs: External journal has more than one "
 					"user (unsupported) - %d\n",
 			be32_to_cpu(journal->j_superblock->s_nr_users));
 		goto out_journal;
 	}
-	EXT3_SB(sb)->journal_bdev = bdev;
-	ext3_init_journal_params(sb, journal);
+	EXT4_SB(sb)->journal_bdev = bdev;
+	ext4_init_journal_params(sb, journal);
 	return journal;
 out_journal:
 	journal_destroy(journal);
 out_bdev:
-	ext3_blkdev_put(bdev);
+	ext4_blkdev_put(bdev);
 	return NULL;
 }
 
-static int ext3_load_journal(struct super_block *sb,
-			     struct ext3_super_block *es,
+static int ext4_load_journal(struct super_block *sb,
+			     struct ext4_super_block *es,
 			     unsigned long journal_devnum)
 {
 	journal_t *journal;
@@ -1986,7 +1986,7 @@ static int ext3_load_journal(struct super_block *sb,
 
 	if (journal_devnum &&
 	    journal_devnum != le32_to_cpu(es->s_journal_dev)) {
-		printk(KERN_INFO "EXT3-fs: external journal device major/minor "
+		printk(KERN_INFO "EXT4-fs: external journal device major/minor "
 			"numbers have changed\n");
 		journal_dev = new_decode_dev(journal_devnum);
 	} else
@@ -2000,56 +2000,56 @@ static int ext3_load_journal(struct super_block *sb,
 	 * can get read-write access to the device.
 	 */
 
-	if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) {
+	if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) {
 		if (sb->s_flags & MS_RDONLY) {
-			printk(KERN_INFO "EXT3-fs: INFO: recovery "
+			printk(KERN_INFO "EXT4-fs: INFO: recovery "
 					"required on readonly filesystem.\n");
 			if (really_read_only) {
-				printk(KERN_ERR "EXT3-fs: write access "
+				printk(KERN_ERR "EXT4-fs: write access "
 					"unavailable, cannot proceed.\n");
 				return -EROFS;
 			}
-			printk (KERN_INFO "EXT3-fs: write access will "
+			printk (KERN_INFO "EXT4-fs: write access will "
 					"be enabled during recovery.\n");
 		}
 	}
 
 	if (journal_inum && journal_dev) {
-		printk(KERN_ERR "EXT3-fs: filesystem has both journal "
+		printk(KERN_ERR "EXT4-fs: filesystem has both journal "
 		       "and inode journals!\n");
 		return -EINVAL;
 	}
 
 	if (journal_inum) {
-		if (!(journal = ext3_get_journal(sb, journal_inum)))
+		if (!(journal = ext4_get_journal(sb, journal_inum)))
 			return -EINVAL;
 	} else {
-		if (!(journal = ext3_get_dev_journal(sb, journal_dev)))
+		if (!(journal = ext4_get_dev_journal(sb, journal_dev)))
 			return -EINVAL;
 	}
 
 	if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) {
 		err = journal_update_format(journal);
 		if (err)  {
-			printk(KERN_ERR "EXT3-fs: error updating journal.\n");
+			printk(KERN_ERR "EXT4-fs: error updating journal.\n");
 			journal_destroy(journal);
 			return err;
 		}
 	}
 
-	if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER))
+	if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER))
 		err = journal_wipe(journal, !really_read_only);
 	if (!err)
 		err = journal_load(journal);
 
 	if (err) {
-		printk(KERN_ERR "EXT3-fs: error loading journal.\n");
+		printk(KERN_ERR "EXT4-fs: error loading journal.\n");
 		journal_destroy(journal);
 		return err;
 	}
 
-	EXT3_SB(sb)->s_journal = journal;
-	ext3_clear_journal_err(sb, es);
+	EXT4_SB(sb)->s_journal = journal;
+	ext4_clear_journal_err(sb, es);
 
 	if (journal_devnum &&
 	    journal_devnum != le32_to_cpu(es->s_journal_dev)) {
@@ -2057,62 +2057,62 @@ static int ext3_load_journal(struct super_block *sb,
 		sb->s_dirt = 1;
 
 		/* Make sure we flush the recovery flag to disk. */
-		ext3_commit_super(sb, es, 1);
+		ext4_commit_super(sb, es, 1);
 	}
 
 	return 0;
 }
 
-static int ext3_create_journal(struct super_block * sb,
-			       struct ext3_super_block * es,
+static int ext4_create_journal(struct super_block * sb,
+			       struct ext4_super_block * es,
 			       unsigned int journal_inum)
 {
 	journal_t *journal;
 
 	if (sb->s_flags & MS_RDONLY) {
-		printk(KERN_ERR "EXT3-fs: readonly filesystem when trying to "
+		printk(KERN_ERR "EXT4-fs: readonly filesystem when trying to "
 				"create journal.\n");
 		return -EROFS;
 	}
 
-	if (!(journal = ext3_get_journal(sb, journal_inum)))
+	if (!(journal = ext4_get_journal(sb, journal_inum)))
 		return -EINVAL;
 
-	printk(KERN_INFO "EXT3-fs: creating new journal on inode %u\n",
+	printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n",
 	       journal_inum);
 
 	if (journal_create(journal)) {
-		printk(KERN_ERR "EXT3-fs: error creating journal.\n");
+		printk(KERN_ERR "EXT4-fs: error creating journal.\n");
 		journal_destroy(journal);
 		return -EIO;
 	}
 
-	EXT3_SB(sb)->s_journal = journal;
+	EXT4_SB(sb)->s_journal = journal;
 
-	ext3_update_dynamic_rev(sb);
-	EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
-	EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL);
+	ext4_update_dynamic_rev(sb);
+	EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
+	EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL);
 
 	es->s_journal_inum = cpu_to_le32(journal_inum);
 	sb->s_dirt = 1;
 
 	/* Make sure we flush the recovery flag to disk. */
-	ext3_commit_super(sb, es, 1);
+	ext4_commit_super(sb, es, 1);
 
 	return 0;
 }
 
-static void ext3_commit_super (struct super_block * sb,
-			       struct ext3_super_block * es,
+static void ext4_commit_super (struct super_block * sb,
+			       struct ext4_super_block * es,
 			       int sync)
 {
-	struct buffer_head *sbh = EXT3_SB(sb)->s_sbh;
+	struct buffer_head *sbh = EXT4_SB(sb)->s_sbh;
 
 	if (!sbh)
 		return;
 	es->s_wtime = cpu_to_le32(get_seconds());
-	es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb));
-	es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb));
+	es->s_free_blocks_count = cpu_to_le32(ext4_count_free_blocks(sb));
+	es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb));
 	BUFFER_TRACE(sbh, "marking dirty");
 	mark_buffer_dirty(sbh);
 	if (sync)
@@ -2125,18 +2125,18 @@ static void ext3_commit_super (struct super_block * sb,
  * remounting) the filesystem readonly, then we will end up with a
  * consistent fs on disk.  Record that fact.
  */
-static void ext3_mark_recovery_complete(struct super_block * sb,
-					struct ext3_super_block * es)
+static void ext4_mark_recovery_complete(struct super_block * sb,
+					struct ext4_super_block * es)
 {
-	journal_t *journal = EXT3_SB(sb)->s_journal;
+	journal_t *journal = EXT4_SB(sb)->s_journal;
 
 	journal_lock_updates(journal);
 	journal_flush(journal);
-	if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) &&
+	if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) &&
 	    sb->s_flags & MS_RDONLY) {
-		EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
+		EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
 		sb->s_dirt = 0;
-		ext3_commit_super(sb, es, 1);
+		ext4_commit_super(sb, es, 1);
 	}
 	journal_unlock_updates(journal);
 }
@@ -2146,33 +2146,33 @@ static void ext3_mark_recovery_complete(struct super_block * sb,
  * has recorded an error from a previous lifetime, move that error to the
  * main filesystem now.
  */
-static void ext3_clear_journal_err(struct super_block * sb,
-				   struct ext3_super_block * es)
+static void ext4_clear_journal_err(struct super_block * sb,
+				   struct ext4_super_block * es)
 {
 	journal_t *journal;
 	int j_errno;
 	const char *errstr;
 
-	journal = EXT3_SB(sb)->s_journal;
+	journal = EXT4_SB(sb)->s_journal;
 
 	/*
 	 * Now check for any error status which may have been recorded in the
-	 * journal by a prior ext3_error() or ext3_abort()
+	 * journal by a prior ext4_error() or ext4_abort()
 	 */
 
 	j_errno = journal_errno(journal);
 	if (j_errno) {
 		char nbuf[16];
 
-		errstr = ext3_decode_error(sb, j_errno, nbuf);
-		ext3_warning(sb, __FUNCTION__, "Filesystem error recorded "
+		errstr = ext4_decode_error(sb, j_errno, nbuf);
+		ext4_warning(sb, __FUNCTION__, "Filesystem error recorded "
 			     "from previous mount: %s", errstr);
-		ext3_warning(sb, __FUNCTION__, "Marking fs in need of "
+		ext4_warning(sb, __FUNCTION__, "Marking fs in need of "
 			     "filesystem check.");
 
-		EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
-		es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
-		ext3_commit_super (sb, es, 1);
+		EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
+		es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
+		ext4_commit_super (sb, es, 1);
 
 		journal_clear_err(journal);
 	}
@@ -2182,7 +2182,7 @@ static void ext3_clear_journal_err(struct super_block * sb,
  * Force the running and committing transactions to commit,
  * and wait on the commit.
  */
-int ext3_force_commit(struct super_block *sb)
+int ext4_force_commit(struct super_block *sb)
 {
 	journal_t *journal;
 	int ret;
@@ -2190,14 +2190,14 @@ int ext3_force_commit(struct super_block *sb)
 	if (sb->s_flags & MS_RDONLY)
 		return 0;
 
-	journal = EXT3_SB(sb)->s_journal;
+	journal = EXT4_SB(sb)->s_journal;
 	sb->s_dirt = 0;
-	ret = ext3_journal_force_commit(journal);
+	ret = ext4_journal_force_commit(journal);
 	return ret;
 }
 
 /*
- * Ext3 always journals updates to the superblock itself, so we don't
+ * Ext4 always journals updates to the superblock itself, so we don't
  * have to propagate any other updates to the superblock on disk at this
  * point.  Just start an async writeback to get the buffers on their way
  * to the disk.
@@ -2205,21 +2205,21 @@ int ext3_force_commit(struct super_block *sb)
  * This implicitly triggers the writebehind on sync().
  */
 
-static void ext3_write_super (struct super_block * sb)
+static void ext4_write_super (struct super_block * sb)
 {
 	if (mutex_trylock(&sb->s_lock) != 0)
 		BUG();
 	sb->s_dirt = 0;
 }
 
-static int ext3_sync_fs(struct super_block *sb, int wait)
+static int ext4_sync_fs(struct super_block *sb, int wait)
 {
 	tid_t target;
 
 	sb->s_dirt = 0;
-	if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) {
+	if (journal_start_commit(EXT4_SB(sb)->s_journal, &target)) {
 		if (wait)
-			log_wait_commit(EXT3_SB(sb)->s_journal, target);
+			log_wait_commit(EXT4_SB(sb)->s_journal, target);
 	}
 	return 0;
 }
@@ -2228,20 +2228,20 @@ static int ext3_sync_fs(struct super_block *sb, int wait)
  * LVM calls this function before a (read-only) snapshot is created.  This
  * gives us a chance to flush the journal completely and mark the fs clean.
  */
-static void ext3_write_super_lockfs(struct super_block *sb)
+static void ext4_write_super_lockfs(struct super_block *sb)
 {
 	sb->s_dirt = 0;
 
 	if (!(sb->s_flags & MS_RDONLY)) {
-		journal_t *journal = EXT3_SB(sb)->s_journal;
+		journal_t *journal = EXT4_SB(sb)->s_journal;
 
 		/* Now we set up the journal barrier. */
 		journal_lock_updates(journal);
 		journal_flush(journal);
 
 		/* Journal blocked and flushed, clear needs_recovery flag. */
-		EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
-		ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
+		EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
+		ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1);
 	}
 }
 
@@ -2249,25 +2249,25 @@ static void ext3_write_super_lockfs(struct super_block *sb)
  * Called by LVM after the snapshot is done.  We need to reset the RECOVER
  * flag here, even though the filesystem is not technically dirty yet.
  */
-static void ext3_unlockfs(struct super_block *sb)
+static void ext4_unlockfs(struct super_block *sb)
 {
 	if (!(sb->s_flags & MS_RDONLY)) {
 		lock_super(sb);
 		/* Reser the needs_recovery flag before the fs is unlocked. */
-		EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
-		ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
+		EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
+		ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1);
 		unlock_super(sb);
-		journal_unlock_updates(EXT3_SB(sb)->s_journal);
+		journal_unlock_updates(EXT4_SB(sb)->s_journal);
 	}
 }
 
-static int ext3_remount (struct super_block * sb, int * flags, char * data)
+static int ext4_remount (struct super_block * sb, int * flags, char * data)
 {
-	struct ext3_super_block * es;
-	struct ext3_sb_info *sbi = EXT3_SB(sb);
-	ext3_fsblk_t n_blocks_count = 0;
+	struct ext4_super_block * es;
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	ext4_fsblk_t n_blocks_count = 0;
 	unsigned long old_sb_flags;
-	struct ext3_mount_options old_opts;
+	struct ext4_mount_options old_opts;
 	int err;
 #ifdef CONFIG_QUOTA
 	int i;
@@ -2293,19 +2293,19 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
 		goto restore_opts;
 	}
 
-	if (sbi->s_mount_opt & EXT3_MOUNT_ABORT)
-		ext3_abort(sb, __FUNCTION__, "Abort forced by user");
+	if (sbi->s_mount_opt & EXT4_MOUNT_ABORT)
+		ext4_abort(sb, __FUNCTION__, "Abort forced by user");
 
 	sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
-		((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
+		((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
 
 	es = sbi->s_es;
 
-	ext3_init_journal_params(sb, sbi->s_journal);
+	ext4_init_journal_params(sb, sbi->s_journal);
 
 	if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) ||
 		n_blocks_count > le32_to_cpu(es->s_blocks_count)) {
-		if (sbi->s_mount_opt & EXT3_MOUNT_ABORT) {
+		if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) {
 			err = -EROFS;
 			goto restore_opts;
 		}
@@ -2322,16 +2322,16 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
 			 * readonly, and if so set the rdonly flag and then
 			 * mark the partition as valid again.
 			 */
-			if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) &&
-			    (sbi->s_mount_state & EXT3_VALID_FS))
+			if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) &&
+			    (sbi->s_mount_state & EXT4_VALID_FS))
 				es->s_state = cpu_to_le16(sbi->s_mount_state);
 
-			ext3_mark_recovery_complete(sb, es);
+			ext4_mark_recovery_complete(sb, es);
 		} else {
 			__le32 ret;
-			if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb,
-					~EXT3_FEATURE_RO_COMPAT_SUPP))) {
-				printk(KERN_WARNING "EXT3-fs: %s: couldn't "
+			if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb,
+					~EXT4_FEATURE_RO_COMPAT_SUPP))) {
+				printk(KERN_WARNING "EXT4-fs: %s: couldn't "
 				       "remount RDWR because of unsupported "
 				       "optional features (%x).\n",
 				       sb->s_id, le32_to_cpu(ret));
@@ -2344,11 +2344,11 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
 			 * been changed by e2fsck since we originally mounted
 			 * the partition.)
 			 */
-			ext3_clear_journal_err(sb, es);
+			ext4_clear_journal_err(sb, es);
 			sbi->s_mount_state = le16_to_cpu(es->s_state);
-			if ((err = ext3_group_extend(sb, es, n_blocks_count)))
+			if ((err = ext4_group_extend(sb, es, n_blocks_count)))
 				goto restore_opts;
-			if (!ext3_setup_super (sb, es, 0))
+			if (!ext4_setup_super (sb, es, 0))
 				sb->s_flags &= ~MS_RDONLY;
 		}
 	}
@@ -2378,19 +2378,19 @@ restore_opts:
 	return err;
 }
 
-static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
+static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf)
 {
 	struct super_block *sb = dentry->d_sb;
-	struct ext3_sb_info *sbi = EXT3_SB(sb);
-	struct ext3_super_block *es = sbi->s_es;
-	ext3_fsblk_t overhead;
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	struct ext4_super_block *es = sbi->s_es;
+	ext4_fsblk_t overhead;
 	int i;
 
 	if (test_opt (sb, MINIX_DF))
 		overhead = 0;
 	else {
 		unsigned long ngroups;
-		ngroups = EXT3_SB(sb)->s_groups_count;
+		ngroups = EXT4_SB(sb)->s_groups_count;
 		smp_rmb();
 
 		/*
@@ -2409,8 +2409,8 @@ static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
 		 * feature is turned on, then not all groups have this.
 		 */
 		for (i = 0; i < ngroups; i++) {
-			overhead += ext3_bg_has_super(sb, i) +
-				ext3_bg_num_gdb(sb, i);
+			overhead += ext4_bg_has_super(sb, i) +
+				ext4_bg_num_gdb(sb, i);
 			cond_resched();
 		}
 
@@ -2418,10 +2418,10 @@ static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
 		 * Every block group has an inode bitmap, a block
 		 * bitmap, and an inode table.
 		 */
-		overhead += (ngroups * (2 + EXT3_SB(sb)->s_itb_per_group));
+		overhead += (ngroups * (2 + EXT4_SB(sb)->s_itb_per_group));
 	}
 
-	buf->f_type = EXT3_SUPER_MAGIC;
+	buf->f_type = EXT4_SUPER_MAGIC;
 	buf->f_bsize = sb->s_blocksize;
 	buf->f_blocks = le32_to_cpu(es->s_blocks_count) - overhead;
 	buf->f_bfree = percpu_counter_sum(&sbi->s_freeblocks_counter);
@@ -2430,14 +2430,14 @@ static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
 		buf->f_bavail = 0;
 	buf->f_files = le32_to_cpu(es->s_inodes_count);
 	buf->f_ffree = percpu_counter_sum(&sbi->s_freeinodes_counter);
-	buf->f_namelen = EXT3_NAME_LEN;
+	buf->f_namelen = EXT4_NAME_LEN;
 	return 0;
 }
 
 /* Helper function for writing quotas on sync - we need to start transaction before quota file
  * is locked for write. Otherwise the are possible deadlocks:
  * Process 1                         Process 2
- * ext3_create()                     quota_sync()
+ * ext4_create()                     quota_sync()
  *   journal_start()                   write_dquot()
  *   DQUOT_INIT()                        down(dqio_mutex)
  *     down(dqio_mutex)                    journal_start()
@@ -2451,111 +2451,111 @@ static inline struct inode *dquot_to_inode(struct dquot *dquot)
 	return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type];
 }
 
-static int ext3_dquot_initialize(struct inode *inode, int type)
+static int ext4_dquot_initialize(struct inode *inode, int type)
 {
 	handle_t *handle;
 	int ret, err;
 
 	/* We may create quota structure so we need to reserve enough blocks */
-	handle = ext3_journal_start(inode, 2*EXT3_QUOTA_INIT_BLOCKS(inode->i_sb));
+	handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb));
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
 	ret = dquot_initialize(inode, type);
-	err = ext3_journal_stop(handle);
+	err = ext4_journal_stop(handle);
 	if (!ret)
 		ret = err;
 	return ret;
 }
 
-static int ext3_dquot_drop(struct inode *inode)
+static int ext4_dquot_drop(struct inode *inode)
 {
 	handle_t *handle;
 	int ret, err;
 
 	/* We may delete quota structure so we need to reserve enough blocks */
-	handle = ext3_journal_start(inode, 2*EXT3_QUOTA_DEL_BLOCKS(inode->i_sb));
+	handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb));
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
 	ret = dquot_drop(inode);
-	err = ext3_journal_stop(handle);
+	err = ext4_journal_stop(handle);
 	if (!ret)
 		ret = err;
 	return ret;
 }
 
-static int ext3_write_dquot(struct dquot *dquot)
+static int ext4_write_dquot(struct dquot *dquot)
 {
 	int ret, err;
 	handle_t *handle;
 	struct inode *inode;
 
 	inode = dquot_to_inode(dquot);
-	handle = ext3_journal_start(inode,
-					EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
+	handle = ext4_journal_start(inode,
+					EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
 	ret = dquot_commit(dquot);
-	err = ext3_journal_stop(handle);
+	err = ext4_journal_stop(handle);
 	if (!ret)
 		ret = err;
 	return ret;
 }
 
-static int ext3_acquire_dquot(struct dquot *dquot)
+static int ext4_acquire_dquot(struct dquot *dquot)
 {
 	int ret, err;
 	handle_t *handle;
 
-	handle = ext3_journal_start(dquot_to_inode(dquot),
-					EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb));
+	handle = ext4_journal_start(dquot_to_inode(dquot),
+					EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb));
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
 	ret = dquot_acquire(dquot);
-	err = ext3_journal_stop(handle);
+	err = ext4_journal_stop(handle);
 	if (!ret)
 		ret = err;
 	return ret;
 }
 
-static int ext3_release_dquot(struct dquot *dquot)
+static int ext4_release_dquot(struct dquot *dquot)
 {
 	int ret, err;
 	handle_t *handle;
 
-	handle = ext3_journal_start(dquot_to_inode(dquot),
-					EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb));
+	handle = ext4_journal_start(dquot_to_inode(dquot),
+					EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb));
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
 	ret = dquot_release(dquot);
-	err = ext3_journal_stop(handle);
+	err = ext4_journal_stop(handle);
 	if (!ret)
 		ret = err;
 	return ret;
 }
 
-static int ext3_mark_dquot_dirty(struct dquot *dquot)
+static int ext4_mark_dquot_dirty(struct dquot *dquot)
 {
 	/* Are we journalling quotas? */
-	if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
-	    EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
+	if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
+	    EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
 		dquot_mark_dquot_dirty(dquot);
-		return ext3_write_dquot(dquot);
+		return ext4_write_dquot(dquot);
 	} else {
 		return dquot_mark_dquot_dirty(dquot);
 	}
 }
 
-static int ext3_write_info(struct super_block *sb, int type)
+static int ext4_write_info(struct super_block *sb, int type)
 {
 	int ret, err;
 	handle_t *handle;
 
 	/* Data block + inode block */
-	handle = ext3_journal_start(sb->s_root->d_inode, 2);
+	handle = ext4_journal_start(sb->s_root->d_inode, 2);
 	if (IS_ERR(handle))
 		return PTR_ERR(handle);
 	ret = dquot_commit_info(sb, type);
-	err = ext3_journal_stop(handle);
+	err = ext4_journal_stop(handle);
 	if (!ret)
 		ret = err;
 	return ret;
@@ -2565,16 +2565,16 @@ static int ext3_write_info(struct super_block *sb, int type)
  * Turn on quotas during mount time - we need to find
  * the quota file and such...
  */
-static int ext3_quota_on_mount(struct super_block *sb, int type)
+static int ext4_quota_on_mount(struct super_block *sb, int type)
 {
-	return vfs_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type],
-			EXT3_SB(sb)->s_jquota_fmt, type);
+	return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type],
+			EXT4_SB(sb)->s_jquota_fmt, type);
 }
 
 /*
  * Standard function to be called on quota_on
  */
-static int ext3_quota_on(struct super_block *sb, int type, int format_id,
+static int ext4_quota_on(struct super_block *sb, int type, int format_id,
 			 char *path)
 {
 	int err;
@@ -2583,8 +2583,8 @@ static int ext3_quota_on(struct super_block *sb, int type, int format_id,
 	if (!test_opt(sb, QUOTA))
 		return -EINVAL;
 	/* Not journalling quota? */
-	if (!EXT3_SB(sb)->s_qf_names[USRQUOTA] &&
-	    !EXT3_SB(sb)->s_qf_names[GRPQUOTA])
+	if (!EXT4_SB(sb)->s_qf_names[USRQUOTA] &&
+	    !EXT4_SB(sb)->s_qf_names[GRPQUOTA])
 		return vfs_quota_on(sb, type, format_id, path);
 	err = path_lookup(path, LOOKUP_FOLLOW, &nd);
 	if (err)
@@ -2597,7 +2597,7 @@ static int ext3_quota_on(struct super_block *sb, int type, int format_id,
 	/* Quotafile not of fs root? */
 	if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
 		printk(KERN_WARNING
-			"EXT3-fs: Quota file not on filesystem root. "
+			"EXT4-fs: Quota file not on filesystem root. "
 			"Journalled quota will not work.\n");
 	path_release(&nd);
 	return vfs_quota_on(sb, type, format_id, path);
@@ -2607,11 +2607,11 @@ static int ext3_quota_on(struct super_block *sb, int type, int format_id,
  * acquiring the locks... As quota files are never truncated and quota code
  * itself serializes the operations (and noone else should touch the files)
  * we don't have to be afraid of races */
-static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
+static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
 			       size_t len, loff_t off)
 {
 	struct inode *inode = sb_dqopt(sb)->files[type];
-	sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
+	sector_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);
 	int err = 0;
 	int offset = off & (sb->s_blocksize - 1);
 	int tocopy;
@@ -2627,7 +2627,7 @@ static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
 	while (toread > 0) {
 		tocopy = sb->s_blocksize - offset < toread ?
 				sb->s_blocksize - offset : toread;
-		bh = ext3_bread(NULL, inode, blk, 0, &err);
+		bh = ext4_bread(NULL, inode, blk, 0, &err);
 		if (err)
 			return err;
 		if (!bh)	/* A hole? */
@@ -2645,15 +2645,15 @@ static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
 
 /* Write to quotafile (we know the transaction is already started and has
  * enough credits) */
-static ssize_t ext3_quota_write(struct super_block *sb, int type,
+static ssize_t ext4_quota_write(struct super_block *sb, int type,
 				const char *data, size_t len, loff_t off)
 {
 	struct inode *inode = sb_dqopt(sb)->files[type];
-	sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
+	sector_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);
 	int err = 0;
 	int offset = off & (sb->s_blocksize - 1);
 	int tocopy;
-	int journal_quota = EXT3_SB(sb)->s_qf_names[type] != NULL;
+	int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL;
 	size_t towrite = len;
 	struct buffer_head *bh;
 	handle_t *handle = journal_current_handle();
@@ -2662,11 +2662,11 @@ static ssize_t ext3_quota_write(struct super_block *sb, int type,
 	while (towrite > 0) {
 		tocopy = sb->s_blocksize - offset < towrite ?
 				sb->s_blocksize - offset : towrite;
-		bh = ext3_bread(handle, inode, blk, 1, &err);
+		bh = ext4_bread(handle, inode, blk, 1, &err);
 		if (!bh)
 			goto out;
 		if (journal_quota) {
-			err = ext3_journal_get_write_access(handle, bh);
+			err = ext4_journal_get_write_access(handle, bh);
 			if (err) {
 				brelse(bh);
 				goto out;
@@ -2677,10 +2677,10 @@ static ssize_t ext3_quota_write(struct super_block *sb, int type,
 		flush_dcache_page(bh->b_page);
 		unlock_buffer(bh);
 		if (journal_quota)
-			err = ext3_journal_dirty_metadata(handle, bh);
+			err = ext4_journal_dirty_metadata(handle, bh);
 		else {
 			/* Always do at least ordered writes for quotas */
-			err = ext3_journal_dirty_data(handle, bh);
+			err = ext4_journal_dirty_data(handle, bh);
 			mark_buffer_dirty(bh);
 		}
 		brelse(bh);
@@ -2696,59 +2696,59 @@ out:
 		return err;
 	if (inode->i_size < off+len-towrite) {
 		i_size_write(inode, off+len-towrite);
-		EXT3_I(inode)->i_disksize = inode->i_size;
+		EXT4_I(inode)->i_disksize = inode->i_size;
 	}
 	inode->i_version++;
 	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
-	ext3_mark_inode_dirty(handle, inode);
+	ext4_mark_inode_dirty(handle, inode);
 	mutex_unlock(&inode->i_mutex);
 	return len - towrite;
 }
 
 #endif
 
-static int ext3_get_sb(struct file_system_type *fs_type,
+static int ext4_get_sb(struct file_system_type *fs_type,
 	int flags, const char *dev_name, void *data, struct vfsmount *mnt)
 {
-	return get_sb_bdev(fs_type, flags, dev_name, data, ext3_fill_super, mnt);
+	return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt);
 }
 
-static struct file_system_type ext3_fs_type = {
+static struct file_system_type ext4dev_fs_type = {
 	.owner		= THIS_MODULE,
-	.name		= "ext3",
-	.get_sb		= ext3_get_sb,
+	.name		= "ext4dev",
+	.get_sb		= ext4_get_sb,
 	.kill_sb	= kill_block_super,
 	.fs_flags	= FS_REQUIRES_DEV,
 };
 
-static int __init init_ext3_fs(void)
+static int __init init_ext4_fs(void)
 {
-	int err = init_ext3_xattr();
+	int err = init_ext4_xattr();
 	if (err)
 		return err;
 	err = init_inodecache();
 	if (err)
 		goto out1;
-        err = register_filesystem(&ext3_fs_type);
+        err = register_filesystem(&ext4dev_fs_type);
 	if (err)
 		goto out;
 	return 0;
 out:
 	destroy_inodecache();
 out1:
-	exit_ext3_xattr();
+	exit_ext4_xattr();
 	return err;
 }
 
-static void __exit exit_ext3_fs(void)
+static void __exit exit_ext4_fs(void)
 {
-	unregister_filesystem(&ext3_fs_type);
+	unregister_filesystem(&ext4dev_fs_type);
 	destroy_inodecache();
-	exit_ext3_xattr();
+	exit_ext4_xattr();
 }
 
 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
-MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
+MODULE_DESCRIPTION("Fourth Extended Filesystem with extents");
 MODULE_LICENSE("GPL");
-module_init(init_ext3_fs)
-module_exit(exit_ext3_fs)
+module_init(init_ext4_fs)
+module_exit(exit_ext4_fs)
diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c
index 4f79122..9e4c75f 100644
--- a/fs/ext4/symlink.c
+++ b/fs/ext4/symlink.c
@@ -1,5 +1,5 @@
 /*
- *  linux/fs/ext3/symlink.c
+ *  linux/fs/ext4/symlink.c
  *
  * Only fast symlinks left here - the rest is done by generic code. AV, 1999
  *
@@ -14,41 +14,41 @@
  *
  *  Copyright (C) 1991, 1992  Linus Torvalds
  *
- *  ext3 symlink handling code
+ *  ext4 symlink handling code
  */
 
 #include <linux/fs.h>
 #include <linux/jbd.h>
-#include <linux/ext3_fs.h>
+#include <linux/ext4_fs.h>
 #include <linux/namei.h>
 #include "xattr.h"
 
-static void * ext3_follow_link(struct dentry *dentry, struct nameidata *nd)
+static void * ext4_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
-	struct ext3_inode_info *ei = EXT3_I(dentry->d_inode);
+	struct ext4_inode_info *ei = EXT4_I(dentry->d_inode);
 	nd_set_link(nd, (char*)ei->i_data);
 	return NULL;
 }
 
-struct inode_operations ext3_symlink_inode_operations = {
+struct inode_operations ext4_symlink_inode_operations = {
 	.readlink	= generic_readlink,
 	.follow_link	= page_follow_link_light,
 	.put_link	= page_put_link,
-#ifdef CONFIG_EXT3_FS_XATTR
+#ifdef CONFIG_EXT4DEV_FS_XATTR
 	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,
-	.listxattr	= ext3_listxattr,
+	.listxattr	= ext4_listxattr,
 	.removexattr	= generic_removexattr,
 #endif
 };
 
-struct inode_operations ext3_fast_symlink_inode_operations = {
+struct inode_operations ext4_fast_symlink_inode_operations = {
 	.readlink	= generic_readlink,
-	.follow_link	= ext3_follow_link,
-#ifdef CONFIG_EXT3_FS_XATTR
+	.follow_link	= ext4_follow_link,
+#ifdef CONFIG_EXT4DEV_FS_XATTR
 	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,
-	.listxattr	= ext3_listxattr,
+	.listxattr	= ext4_listxattr,
 	.removexattr	= generic_removexattr,
 #endif
 };
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index f86f248..d3a4081 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1,10 +1,10 @@
 /*
- * linux/fs/ext3/xattr.c
+ * linux/fs/ext4/xattr.c
  *
  * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
  *
  * Fix by Harrison Xing <harrison@mountainviewdata.com>.
- * Ext3 code with a lot of help from Eric Jarman <ejarman@acm.org>.
+ * Ext4 code with a lot of help from Eric Jarman <ejarman@acm.org>.
  * Extended attributes for symlinks and special files added per
  *  suggestion of Luka Renko <luka.renko@hermes.si>.
  * xattr consolidation Copyright (c) 2004 James Morris <jmorris@redhat.com>,
@@ -43,7 +43,7 @@
  *
  * Locking strategy
  * ----------------
- * EXT3_I(inode)->i_file_acl is protected by EXT3_I(inode)->xattr_sem.
+ * EXT4_I(inode)->i_file_acl is protected by EXT4_I(inode)->xattr_sem.
  * EA blocks are only changed if they are exclusive to an inode, so
  * holding xattr_sem also means that nothing but the EA block's reference
  * count can change. Multiple writers to the same block are synchronized
@@ -53,27 +53,27 @@
 #include <linux/init.h>
 #include <linux/fs.h>
 #include <linux/slab.h>
-#include <linux/ext3_jbd.h>
-#include <linux/ext3_fs.h>
+#include <linux/ext4_jbd.h>
+#include <linux/ext4_fs.h>
 #include <linux/mbcache.h>
 #include <linux/quotaops.h>
 #include <linux/rwsem.h>
 #include "xattr.h"
 #include "acl.h"
 
-#define BHDR(bh) ((struct ext3_xattr_header *)((bh)->b_data))
-#define ENTRY(ptr) ((struct ext3_xattr_entry *)(ptr))
+#define BHDR(bh) ((struct ext4_xattr_header *)((bh)->b_data))
+#define ENTRY(ptr) ((struct ext4_xattr_entry *)(ptr))
 #define BFIRST(bh) ENTRY(BHDR(bh)+1)
 #define IS_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0)
 
 #define IHDR(inode, raw_inode) \
-	((struct ext3_xattr_ibody_header *) \
+	((struct ext4_xattr_ibody_header *) \
 		((void *)raw_inode + \
-		 EXT3_GOOD_OLD_INODE_SIZE + \
-		 EXT3_I(inode)->i_extra_isize))
-#define IFIRST(hdr) ((struct ext3_xattr_entry *)((hdr)+1))
+		 EXT4_GOOD_OLD_INODE_SIZE + \
+		 EXT4_I(inode)->i_extra_isize))
+#define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1))
 
-#ifdef EXT3_XATTR_DEBUG
+#ifdef EXT4_XATTR_DEBUG
 # define ea_idebug(inode, f...) do { \
 		printk(KERN_DEBUG "inode %s:%lu: ", \
 			inode->i_sb->s_id, inode->i_ino); \
@@ -93,47 +93,47 @@
 # define ea_bdebug(f...)
 #endif
 
-static void ext3_xattr_cache_insert(struct buffer_head *);
-static struct buffer_head *ext3_xattr_cache_find(struct inode *,
-						 struct ext3_xattr_header *,
+static void ext4_xattr_cache_insert(struct buffer_head *);
+static struct buffer_head *ext4_xattr_cache_find(struct inode *,
+						 struct ext4_xattr_header *,
 						 struct mb_cache_entry **);
-static void ext3_xattr_rehash(struct ext3_xattr_header *,
-			      struct ext3_xattr_entry *);
+static void ext4_xattr_rehash(struct ext4_xattr_header *,
+			      struct ext4_xattr_entry *);
 
-static struct mb_cache *ext3_xattr_cache;
+static struct mb_cache *ext4_xattr_cache;
 
-static struct xattr_handler *ext3_xattr_handler_map[] = {
-	[EXT3_XATTR_INDEX_USER]		     = &ext3_xattr_user_handler,
-#ifdef CONFIG_EXT3_FS_POSIX_ACL
-	[EXT3_XATTR_INDEX_POSIX_ACL_ACCESS]  = &ext3_xattr_acl_access_handler,
-	[EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT] = &ext3_xattr_acl_default_handler,
+static struct xattr_handler *ext4_xattr_handler_map[] = {
+	[EXT4_XATTR_INDEX_USER]		     = &ext4_xattr_user_handler,
+#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+	[EXT4_XATTR_INDEX_POSIX_ACL_ACCESS]  = &ext4_xattr_acl_access_handler,
+	[EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT] = &ext4_xattr_acl_default_handler,
 #endif
-	[EXT3_XATTR_INDEX_TRUSTED]	     = &ext3_xattr_trusted_handler,
-#ifdef CONFIG_EXT3_FS_SECURITY
-	[EXT3_XATTR_INDEX_SECURITY]	     = &ext3_xattr_security_handler,
+	[EXT4_XATTR_INDEX_TRUSTED]	     = &ext4_xattr_trusted_handler,
+#ifdef CONFIG_EXT4DEV_FS_SECURITY
+	[EXT4_XATTR_INDEX_SECURITY]	     = &ext4_xattr_security_handler,
 #endif
 };
 
-struct xattr_handler *ext3_xattr_handlers[] = {
-	&ext3_xattr_user_handler,
-	&ext3_xattr_trusted_handler,
-#ifdef CONFIG_EXT3_FS_POSIX_ACL
-	&ext3_xattr_acl_access_handler,
-	&ext3_xattr_acl_default_handler,
+struct xattr_handler *ext4_xattr_handlers[] = {
+	&ext4_xattr_user_handler,
+	&ext4_xattr_trusted_handler,
+#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+	&ext4_xattr_acl_access_handler,
+	&ext4_xattr_acl_default_handler,
 #endif
-#ifdef CONFIG_EXT3_FS_SECURITY
-	&ext3_xattr_security_handler,
+#ifdef CONFIG_EXT4DEV_FS_SECURITY
+	&ext4_xattr_security_handler,
 #endif
 	NULL
 };
 
 static inline struct xattr_handler *
-ext3_xattr_handler(int name_index)
+ext4_xattr_handler(int name_index)
 {
 	struct xattr_handler *handler = NULL;
 
-	if (name_index > 0 && name_index < ARRAY_SIZE(ext3_xattr_handler_map))
-		handler = ext3_xattr_handler_map[name_index];
+	if (name_index > 0 && name_index < ARRAY_SIZE(ext4_xattr_handler_map))
+		handler = ext4_xattr_handler_map[name_index];
 	return handler;
 }
 
@@ -143,16 +143,16 @@ ext3_xattr_handler(int name_index)
  * dentry->d_inode->i_mutex: don't care
  */
 ssize_t
-ext3_listxattr(struct dentry *dentry, char *buffer, size_t size)
+ext4_listxattr(struct dentry *dentry, char *buffer, size_t size)
 {
-	return ext3_xattr_list(dentry->d_inode, buffer, size);
+	return ext4_xattr_list(dentry->d_inode, buffer, size);
 }
 
 static int
-ext3_xattr_check_names(struct ext3_xattr_entry *entry, void *end)
+ext4_xattr_check_names(struct ext4_xattr_entry *entry, void *end)
 {
 	while (!IS_LAST_ENTRY(entry)) {
-		struct ext3_xattr_entry *next = EXT3_XATTR_NEXT(entry);
+		struct ext4_xattr_entry *next = EXT4_XATTR_NEXT(entry);
 		if ((void *)next >= end)
 			return -EIO;
 		entry = next;
@@ -161,19 +161,19 @@ ext3_xattr_check_names(struct ext3_xattr_entry *entry, void *end)
 }
 
 static inline int
-ext3_xattr_check_block(struct buffer_head *bh)
+ext4_xattr_check_block(struct buffer_head *bh)
 {
 	int error;
 
-	if (BHDR(bh)->h_magic != cpu_to_le32(EXT3_XATTR_MAGIC) ||
+	if (BHDR(bh)->h_magic != cpu_to_le32(EXT4_XATTR_MAGIC) ||
 	    BHDR(bh)->h_blocks != cpu_to_le32(1))
 		return -EIO;
-	error = ext3_xattr_check_names(BFIRST(bh), bh->b_data + bh->b_size);
+	error = ext4_xattr_check_names(BFIRST(bh), bh->b_data + bh->b_size);
 	return error;
 }
 
 static inline int
-ext3_xattr_check_entry(struct ext3_xattr_entry *entry, size_t size)
+ext4_xattr_check_entry(struct ext4_xattr_entry *entry, size_t size)
 {
 	size_t value_size = le32_to_cpu(entry->e_value_size);
 
@@ -184,10 +184,10 @@ ext3_xattr_check_entry(struct ext3_xattr_entry *entry, size_t size)
 }
 
 static int
-ext3_xattr_find_entry(struct ext3_xattr_entry **pentry, int name_index,
+ext4_xattr_find_entry(struct ext4_xattr_entry **pentry, int name_index,
 		      const char *name, size_t size, int sorted)
 {
-	struct ext3_xattr_entry *entry;
+	struct ext4_xattr_entry *entry;
 	size_t name_len;
 	int cmp = 1;
 
@@ -195,7 +195,7 @@ ext3_xattr_find_entry(struct ext3_xattr_entry **pentry, int name_index,
 		return -EINVAL;
 	name_len = strlen(name);
 	entry = *pentry;
-	for (; !IS_LAST_ENTRY(entry); entry = EXT3_XATTR_NEXT(entry)) {
+	for (; !IS_LAST_ENTRY(entry); entry = EXT4_XATTR_NEXT(entry)) {
 		cmp = name_index - entry->e_name_index;
 		if (!cmp)
 			cmp = name_len - entry->e_name_len;
@@ -205,17 +205,17 @@ ext3_xattr_find_entry(struct ext3_xattr_entry **pentry, int name_index,
 			break;
 	}
 	*pentry = entry;
-	if (!cmp && ext3_xattr_check_entry(entry, size))
+	if (!cmp && ext4_xattr_check_entry(entry, size))
 			return -EIO;
 	return cmp ? -ENODATA : 0;
 }
 
 static int
-ext3_xattr_block_get(struct inode *inode, int name_index, const char *name,
+ext4_xattr_block_get(struct inode *inode, int name_index, const char *name,
 		     void *buffer, size_t buffer_size)
 {
 	struct buffer_head *bh = NULL;
-	struct ext3_xattr_entry *entry;
+	struct ext4_xattr_entry *entry;
 	size_t size;
 	int error;
 
@@ -223,24 +223,24 @@ ext3_xattr_block_get(struct inode *inode, int name_index, const char *name,
 		  name_index, name, buffer, (long)buffer_size);
 
 	error = -ENODATA;
-	if (!EXT3_I(inode)->i_file_acl)
+	if (!EXT4_I(inode)->i_file_acl)
 		goto cleanup;
-	ea_idebug(inode, "reading block %u", EXT3_I(inode)->i_file_acl);
-	bh = sb_bread(inode->i_sb, EXT3_I(inode)->i_file_acl);
+	ea_idebug(inode, "reading block %u", EXT4_I(inode)->i_file_acl);
+	bh = sb_bread(inode->i_sb, EXT4_I(inode)->i_file_acl);
 	if (!bh)
 		goto cleanup;
 	ea_bdebug(bh, "b_count=%d, refcount=%d",
 		atomic_read(&(bh->b_count)), le32_to_cpu(BHDR(bh)->h_refcount));
-	if (ext3_xattr_check_block(bh)) {
-bad_block:	ext3_error(inode->i_sb, __FUNCTION__,
+	if (ext4_xattr_check_block(bh)) {
+bad_block:	ext4_error(inode->i_sb, __FUNCTION__,
 			   "inode %lu: bad block "E3FSBLK, inode->i_ino,
-			   EXT3_I(inode)->i_file_acl);
+			   EXT4_I(inode)->i_file_acl);
 		error = -EIO;
 		goto cleanup;
 	}
-	ext3_xattr_cache_insert(bh);
+	ext4_xattr_cache_insert(bh);
 	entry = BFIRST(bh);
-	error = ext3_xattr_find_entry(&entry, name_index, name, bh->b_size, 1);
+	error = ext4_xattr_find_entry(&entry, name_index, name, bh->b_size, 1);
 	if (error == -EIO)
 		goto bad_block;
 	if (error)
@@ -261,30 +261,30 @@ cleanup:
 }
 
 static int
-ext3_xattr_ibody_get(struct inode *inode, int name_index, const char *name,
+ext4_xattr_ibody_get(struct inode *inode, int name_index, const char *name,
 		     void *buffer, size_t buffer_size)
 {
-	struct ext3_xattr_ibody_header *header;
-	struct ext3_xattr_entry *entry;
-	struct ext3_inode *raw_inode;
-	struct ext3_iloc iloc;
+	struct ext4_xattr_ibody_header *header;
+	struct ext4_xattr_entry *entry;
+	struct ext4_inode *raw_inode;
+	struct ext4_iloc iloc;
 	size_t size;
 	void *end;
 	int error;
 
-	if (!(EXT3_I(inode)->i_state & EXT3_STATE_XATTR))
+	if (!(EXT4_I(inode)->i_state & EXT4_STATE_XATTR))
 		return -ENODATA;
-	error = ext3_get_inode_loc(inode, &iloc);
+	error = ext4_get_inode_loc(inode, &iloc);
 	if (error)
 		return error;
-	raw_inode = ext3_raw_inode(&iloc);
+	raw_inode = ext4_raw_inode(&iloc);
 	header = IHDR(inode, raw_inode);
 	entry = IFIRST(header);
-	end = (void *)raw_inode + EXT3_SB(inode->i_sb)->s_inode_size;
-	error = ext3_xattr_check_names(entry, end);
+	end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size;
+	error = ext4_xattr_check_names(entry, end);
 	if (error)
 		goto cleanup;
-	error = ext3_xattr_find_entry(&entry, name_index, name,
+	error = ext4_xattr_find_entry(&entry, name_index, name,
 				      end - (void *)entry, 0);
 	if (error)
 		goto cleanup;
@@ -304,7 +304,7 @@ cleanup:
 }
 
 /*
- * ext3_xattr_get()
+ * ext4_xattr_get()
  *
  * Copy an extended attribute into the buffer
  * provided, or compute the buffer size required.
@@ -314,30 +314,30 @@ cleanup:
  * used / required on success.
  */
 int
-ext3_xattr_get(struct inode *inode, int name_index, const char *name,
+ext4_xattr_get(struct inode *inode, int name_index, const char *name,
 	       void *buffer, size_t buffer_size)
 {
 	int error;
 
-	down_read(&EXT3_I(inode)->xattr_sem);
-	error = ext3_xattr_ibody_get(inode, name_index, name, buffer,
+	down_read(&EXT4_I(inode)->xattr_sem);
+	error = ext4_xattr_ibody_get(inode, name_index, name, buffer,
 				     buffer_size);
 	if (error == -ENODATA)
-		error = ext3_xattr_block_get(inode, name_index, name, buffer,
+		error = ext4_xattr_block_get(inode, name_index, name, buffer,
 					     buffer_size);
-	up_read(&EXT3_I(inode)->xattr_sem);
+	up_read(&EXT4_I(inode)->xattr_sem);
 	return error;
 }
 
 static int
-ext3_xattr_list_entries(struct inode *inode, struct ext3_xattr_entry *entry,
+ext4_xattr_list_entries(struct inode *inode, struct ext4_xattr_entry *entry,
 			char *buffer, size_t buffer_size)
 {
 	size_t rest = buffer_size;
 
-	for (; !IS_LAST_ENTRY(entry); entry = EXT3_XATTR_NEXT(entry)) {
+	for (; !IS_LAST_ENTRY(entry); entry = EXT4_XATTR_NEXT(entry)) {
 		struct xattr_handler *handler =
-			ext3_xattr_handler(entry->e_name_index);
+			ext4_xattr_handler(entry->e_name_index);
 
 		if (handler) {
 			size_t size = handler->list(inode, buffer, rest,
@@ -355,7 +355,7 @@ ext3_xattr_list_entries(struct inode *inode, struct ext3_xattr_entry *entry,
 }
 
 static int
-ext3_xattr_block_list(struct inode *inode, char *buffer, size_t buffer_size)
+ext4_xattr_block_list(struct inode *inode, char *buffer, size_t buffer_size)
 {
 	struct buffer_head *bh = NULL;
 	int error;
@@ -364,24 +364,24 @@ ext3_xattr_block_list(struct inode *inode, char *buffer, size_t buffer_size)
 		  buffer, (long)buffer_size);
 
 	error = 0;
-	if (!EXT3_I(inode)->i_file_acl)
+	if (!EXT4_I(inode)->i_file_acl)
 		goto cleanup;
-	ea_idebug(inode, "reading block %u", EXT3_I(inode)->i_file_acl);
-	bh = sb_bread(inode->i_sb, EXT3_I(inode)->i_file_acl);
+	ea_idebug(inode, "reading block %u", EXT4_I(inode)->i_file_acl);
+	bh = sb_bread(inode->i_sb, EXT4_I(inode)->i_file_acl);
 	error = -EIO;
 	if (!bh)
 		goto cleanup;
 	ea_bdebug(bh, "b_count=%d, refcount=%d",
 		atomic_read(&(bh->b_count)), le32_to_cpu(BHDR(bh)->h_refcount));
-	if (ext3_xattr_check_block(bh)) {
-		ext3_error(inode->i_sb, __FUNCTION__,
+	if (ext4_xattr_check_block(bh)) {
+		ext4_error(inode->i_sb, __FUNCTION__,
 			   "inode %lu: bad block "E3FSBLK, inode->i_ino,
-			   EXT3_I(inode)->i_file_acl);
+			   EXT4_I(inode)->i_file_acl);
 		error = -EIO;
 		goto cleanup;
 	}
-	ext3_xattr_cache_insert(bh);
-	error = ext3_xattr_list_entries(inode, BFIRST(bh), buffer, buffer_size);
+	ext4_xattr_cache_insert(bh);
+	error = ext4_xattr_list_entries(inode, BFIRST(bh), buffer, buffer_size);
 
 cleanup:
 	brelse(bh);
@@ -390,26 +390,26 @@ cleanup:
 }
 
 static int
-ext3_xattr_ibody_list(struct inode *inode, char *buffer, size_t buffer_size)
+ext4_xattr_ibody_list(struct inode *inode, char *buffer, size_t buffer_size)
 {
-	struct ext3_xattr_ibody_header *header;
-	struct ext3_inode *raw_inode;
-	struct ext3_iloc iloc;
+	struct ext4_xattr_ibody_header *header;
+	struct ext4_inode *raw_inode;
+	struct ext4_iloc iloc;
 	void *end;
 	int error;
 
-	if (!(EXT3_I(inode)->i_state & EXT3_STATE_XATTR))
+	if (!(EXT4_I(inode)->i_state & EXT4_STATE_XATTR))
 		return 0;
-	error = ext3_get_inode_loc(inode, &iloc);
+	error = ext4_get_inode_loc(inode, &iloc);
 	if (error)
 		return error;
-	raw_inode = ext3_raw_inode(&iloc);
+	raw_inode = ext4_raw_inode(&iloc);
 	header = IHDR(inode, raw_inode);
-	end = (void *)raw_inode + EXT3_SB(inode->i_sb)->s_inode_size;
-	error = ext3_xattr_check_names(IFIRST(header), end);
+	end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size;
+	error = ext4_xattr_check_names(IFIRST(header), end);
 	if (error)
 		goto cleanup;
-	error = ext3_xattr_list_entries(inode, IFIRST(header),
+	error = ext4_xattr_list_entries(inode, IFIRST(header),
 					buffer, buffer_size);
 
 cleanup:
@@ -418,7 +418,7 @@ cleanup:
 }
 
 /*
- * ext3_xattr_list()
+ * ext4_xattr_list()
  *
  * Copy a list of attribute names into the buffer
  * provided, or compute the buffer size required.
@@ -428,12 +428,12 @@ cleanup:
  * used / required on success.
  */
 int
-ext3_xattr_list(struct inode *inode, char *buffer, size_t buffer_size)
+ext4_xattr_list(struct inode *inode, char *buffer, size_t buffer_size)
 {
 	int i_error, b_error;
 
-	down_read(&EXT3_I(inode)->xattr_sem);
-	i_error = ext3_xattr_ibody_list(inode, buffer, buffer_size);
+	down_read(&EXT4_I(inode)->xattr_sem);
+	i_error = ext4_xattr_ibody_list(inode, buffer, buffer_size);
 	if (i_error < 0) {
 		b_error = 0;
 	} else {
@@ -441,30 +441,30 @@ ext3_xattr_list(struct inode *inode, char *buffer, size_t buffer_size)
 			buffer += i_error;
 			buffer_size -= i_error;
 		}
-		b_error = ext3_xattr_block_list(inode, buffer, buffer_size);
+		b_error = ext4_xattr_block_list(inode, buffer, buffer_size);
 		if (b_error < 0)
 			i_error = 0;
 	}
-	up_read(&EXT3_I(inode)->xattr_sem);
+	up_read(&EXT4_I(inode)->xattr_sem);
 	return i_error + b_error;
 }
 
 /*
- * If the EXT3_FEATURE_COMPAT_EXT_ATTR feature of this file system is
+ * If the EXT4_FEATURE_COMPAT_EXT_ATTR feature of this file system is
  * not set, set it.
  */
-static void ext3_xattr_update_super_block(handle_t *handle,
+static void ext4_xattr_update_super_block(handle_t *handle,
 					  struct super_block *sb)
 {
-	if (EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_EXT_ATTR))
+	if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_EXT_ATTR))
 		return;
 
 	lock_super(sb);
-	if (ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh) == 0) {
-		EXT3_SB(sb)->s_es->s_feature_compat |=
-			cpu_to_le32(EXT3_FEATURE_COMPAT_EXT_ATTR);
+	if (ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh) == 0) {
+		EXT4_SB(sb)->s_es->s_feature_compat |=
+			cpu_to_le32(EXT4_FEATURE_COMPAT_EXT_ATTR);
 		sb->s_dirt = 1;
-		ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
+		ext4_journal_dirty_metadata(handle, EXT4_SB(sb)->s_sbh);
 	}
 	unlock_super(sb);
 }
@@ -474,25 +474,25 @@ static void ext3_xattr_update_super_block(handle_t *handle,
  * it; otherwise free the block.
  */
 static void
-ext3_xattr_release_block(handle_t *handle, struct inode *inode,
+ext4_xattr_release_block(handle_t *handle, struct inode *inode,
 			 struct buffer_head *bh)
 {
 	struct mb_cache_entry *ce = NULL;
 
-	ce = mb_cache_entry_get(ext3_xattr_cache, bh->b_bdev, bh->b_blocknr);
+	ce = mb_cache_entry_get(ext4_xattr_cache, bh->b_bdev, bh->b_blocknr);
 	if (BHDR(bh)->h_refcount == cpu_to_le32(1)) {
 		ea_bdebug(bh, "refcount now=0; freeing");
 		if (ce)
 			mb_cache_entry_free(ce);
-		ext3_free_blocks(handle, inode, bh->b_blocknr, 1);
+		ext4_free_blocks(handle, inode, bh->b_blocknr, 1);
 		get_bh(bh);
-		ext3_forget(handle, 1, inode, bh, bh->b_blocknr);
+		ext4_forget(handle, 1, inode, bh, bh->b_blocknr);
 	} else {
-		if (ext3_journal_get_write_access(handle, bh) == 0) {
+		if (ext4_journal_get_write_access(handle, bh) == 0) {
 			lock_buffer(bh);
 			BHDR(bh)->h_refcount = cpu_to_le32(
 				le32_to_cpu(BHDR(bh)->h_refcount) - 1);
-			ext3_journal_dirty_metadata(handle, bh);
+			ext4_journal_dirty_metadata(handle, bh);
 			if (IS_SYNC(inode))
 				handle->h_sync = 1;
 			DQUOT_FREE_BLOCK(inode, 1);
@@ -505,30 +505,30 @@ ext3_xattr_release_block(handle_t *handle, struct inode *inode,
 	}
 }
 
-struct ext3_xattr_info {
+struct ext4_xattr_info {
 	int name_index;
 	const char *name;
 	const void *value;
 	size_t value_len;
 };
 
-struct ext3_xattr_search {
-	struct ext3_xattr_entry *first;
+struct ext4_xattr_search {
+	struct ext4_xattr_entry *first;
 	void *base;
 	void *end;
-	struct ext3_xattr_entry *here;
+	struct ext4_xattr_entry *here;
 	int not_found;
 };
 
 static int
-ext3_xattr_set_entry(struct ext3_xattr_info *i, struct ext3_xattr_search *s)
+ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
 {
-	struct ext3_xattr_entry *last;
+	struct ext4_xattr_entry *last;
 	size_t free, min_offs = s->end - s->base, name_len = strlen(i->name);
 
 	/* Compute min_offs and last. */
 	last = s->first;
-	for (; !IS_LAST_ENTRY(last); last = EXT3_XATTR_NEXT(last)) {
+	for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) {
 		if (!last->e_value_block && last->e_value_size) {
 			size_t offs = le16_to_cpu(last->e_value_offs);
 			if (offs < min_offs)
@@ -539,20 +539,20 @@ ext3_xattr_set_entry(struct ext3_xattr_info *i, struct ext3_xattr_search *s)
 	if (!s->not_found) {
 		if (!s->here->e_value_block && s->here->e_value_size) {
 			size_t size = le32_to_cpu(s->here->e_value_size);
-			free += EXT3_XATTR_SIZE(size);
+			free += EXT4_XATTR_SIZE(size);
 		}
-		free += EXT3_XATTR_LEN(name_len);
+		free += EXT4_XATTR_LEN(name_len);
 	}
 	if (i->value) {
-		if (free < EXT3_XATTR_SIZE(i->value_len) ||
-		    free < EXT3_XATTR_LEN(name_len) +
-			   EXT3_XATTR_SIZE(i->value_len))
+		if (free < EXT4_XATTR_SIZE(i->value_len) ||
+		    free < EXT4_XATTR_LEN(name_len) +
+			   EXT4_XATTR_SIZE(i->value_len))
 			return -ENOSPC;
 	}
 
 	if (i->value && s->not_found) {
 		/* Insert the new name. */
-		size_t size = EXT3_XATTR_LEN(name_len);
+		size_t size = EXT4_XATTR_LEN(name_len);
 		size_t rest = (void *)last - (void *)s->here + sizeof(__u32);
 		memmove((void *)s->here + size, s->here, rest);
 		memset(s->here, 0, size);
@@ -564,16 +564,16 @@ ext3_xattr_set_entry(struct ext3_xattr_info *i, struct ext3_xattr_search *s)
 			void *first_val = s->base + min_offs;
 			size_t offs = le16_to_cpu(s->here->e_value_offs);
 			void *val = s->base + offs;
-			size_t size = EXT3_XATTR_SIZE(
+			size_t size = EXT4_XATTR_SIZE(
 				le32_to_cpu(s->here->e_value_size));
 
-			if (i->value && size == EXT3_XATTR_SIZE(i->value_len)) {
+			if (i->value && size == EXT4_XATTR_SIZE(i->value_len)) {
 				/* The old and the new value have the same
 				   size. Just replace. */
 				s->here->e_value_size =
 					cpu_to_le32(i->value_len);
-				memset(val + size - EXT3_XATTR_PAD, 0,
-				       EXT3_XATTR_PAD); /* Clear pad bytes. */
+				memset(val + size - EXT4_XATTR_PAD, 0,
+				       EXT4_XATTR_PAD); /* Clear pad bytes. */
 				memcpy(val, i->value, i->value_len);
 				return 0;
 			}
@@ -593,12 +593,12 @@ ext3_xattr_set_entry(struct ext3_xattr_info *i, struct ext3_xattr_search *s)
 				    last->e_value_size && o < offs)
 					last->e_value_offs =
 						cpu_to_le16(o + size);
-				last = EXT3_XATTR_NEXT(last);
+				last = EXT4_XATTR_NEXT(last);
 			}
 		}
 		if (!i->value) {
 			/* Remove the old name. */
-			size_t size = EXT3_XATTR_LEN(name_len);
+			size_t size = EXT4_XATTR_LEN(name_len);
 			last = ENTRY((void *)last - size);
 			memmove(s->here, (void *)s->here + size,
 				(void *)last - (void *)s->here + sizeof(__u32));
@@ -610,25 +610,25 @@ ext3_xattr_set_entry(struct ext3_xattr_info *i, struct ext3_xattr_search *s)
 		/* Insert the new value. */
 		s->here->e_value_size = cpu_to_le32(i->value_len);
 		if (i->value_len) {
-			size_t size = EXT3_XATTR_SIZE(i->value_len);
+			size_t size = EXT4_XATTR_SIZE(i->value_len);
 			void *val = s->base + min_offs - size;
 			s->here->e_value_offs = cpu_to_le16(min_offs - size);
-			memset(val + size - EXT3_XATTR_PAD, 0,
-			       EXT3_XATTR_PAD); /* Clear the pad bytes. */
+			memset(val + size - EXT4_XATTR_PAD, 0,
+			       EXT4_XATTR_PAD); /* Clear the pad bytes. */
 			memcpy(val, i->value, i->value_len);
 		}
 	}
 	return 0;
 }
 
-struct ext3_xattr_block_find {
-	struct ext3_xattr_search s;
+struct ext4_xattr_block_find {
+	struct ext4_xattr_search s;
 	struct buffer_head *bh;
 };
 
 static int
-ext3_xattr_block_find(struct inode *inode, struct ext3_xattr_info *i,
-		      struct ext3_xattr_block_find *bs)
+ext4_xattr_block_find(struct inode *inode, struct ext4_xattr_info *i,
+		      struct ext4_xattr_block_find *bs)
 {
 	struct super_block *sb = inode->i_sb;
 	int error;
@@ -636,19 +636,19 @@ ext3_xattr_block_find(struct inode *inode, struct ext3_xattr_info *i,
 	ea_idebug(inode, "name=%d.%s, value=%p, value_len=%ld",
 		  i->name_index, i->name, i->value, (long)i->value_len);
 
-	if (EXT3_I(inode)->i_file_acl) {
+	if (EXT4_I(inode)->i_file_acl) {
 		/* The inode already has an extended attribute block. */
-		bs->bh = sb_bread(sb, EXT3_I(inode)->i_file_acl);
+		bs->bh = sb_bread(sb, EXT4_I(inode)->i_file_acl);
 		error = -EIO;
 		if (!bs->bh)
 			goto cleanup;
 		ea_bdebug(bs->bh, "b_count=%d, refcount=%d",
 			atomic_read(&(bs->bh->b_count)),
 			le32_to_cpu(BHDR(bs->bh)->h_refcount));
-		if (ext3_xattr_check_block(bs->bh)) {
-			ext3_error(sb, __FUNCTION__,
+		if (ext4_xattr_check_block(bs->bh)) {
+			ext4_error(sb, __FUNCTION__,
 				"inode %lu: bad block "E3FSBLK, inode->i_ino,
-				EXT3_I(inode)->i_file_acl);
+				EXT4_I(inode)->i_file_acl);
 			error = -EIO;
 			goto cleanup;
 		}
@@ -657,7 +657,7 @@ ext3_xattr_block_find(struct inode *inode, struct ext3_xattr_info *i,
 		bs->s.first = BFIRST(bs->bh);
 		bs->s.end = bs->bh->b_data + bs->bh->b_size;
 		bs->s.here = bs->s.first;
-		error = ext3_xattr_find_entry(&bs->s.here, i->name_index,
+		error = ext4_xattr_find_entry(&bs->s.here, i->name_index,
 					      i->name, bs->bh->b_size, 1);
 		if (error && error != -ENODATA)
 			goto cleanup;
@@ -670,22 +670,22 @@ cleanup:
 }
 
 static int
-ext3_xattr_block_set(handle_t *handle, struct inode *inode,
-		     struct ext3_xattr_info *i,
-		     struct ext3_xattr_block_find *bs)
+ext4_xattr_block_set(handle_t *handle, struct inode *inode,
+		     struct ext4_xattr_info *i,
+		     struct ext4_xattr_block_find *bs)
 {
 	struct super_block *sb = inode->i_sb;
 	struct buffer_head *new_bh = NULL;
-	struct ext3_xattr_search *s = &bs->s;
+	struct ext4_xattr_search *s = &bs->s;
 	struct mb_cache_entry *ce = NULL;
 	int error;
 
-#define header(x) ((struct ext3_xattr_header *)(x))
+#define header(x) ((struct ext4_xattr_header *)(x))
 
 	if (i->value && i->value_len > sb->s_blocksize)
 		return -ENOSPC;
 	if (s->base) {
-		ce = mb_cache_entry_get(ext3_xattr_cache, bs->bh->b_bdev,
+		ce = mb_cache_entry_get(ext4_xattr_cache, bs->bh->b_bdev,
 					bs->bh->b_blocknr);
 		if (header(s->base)->h_refcount == cpu_to_le32(1)) {
 			if (ce) {
@@ -693,22 +693,22 @@ ext3_xattr_block_set(handle_t *handle, struct inode *inode,
 				ce = NULL;
 			}
 			ea_bdebug(bs->bh, "modifying in-place");
-			error = ext3_journal_get_write_access(handle, bs->bh);
+			error = ext4_journal_get_write_access(handle, bs->bh);
 			if (error)
 				goto cleanup;
 			lock_buffer(bs->bh);
-			error = ext3_xattr_set_entry(i, s);
+			error = ext4_xattr_set_entry(i, s);
 			if (!error) {
 				if (!IS_LAST_ENTRY(s->first))
-					ext3_xattr_rehash(header(s->base),
+					ext4_xattr_rehash(header(s->base),
 							  s->here);
-				ext3_xattr_cache_insert(bs->bh);
+				ext4_xattr_cache_insert(bs->bh);
 			}
 			unlock_buffer(bs->bh);
 			if (error == -EIO)
 				goto bad_block;
 			if (!error)
-				error = ext3_journal_dirty_metadata(handle,
+				error = ext4_journal_dirty_metadata(handle,
 								    bs->bh);
 			if (error)
 				goto cleanup;
@@ -739,7 +739,7 @@ ext3_xattr_block_set(handle_t *handle, struct inode *inode,
 		if (s->base == NULL)
 			goto cleanup;
 		memset(s->base, 0, sb->s_blocksize);
-		header(s->base)->h_magic = cpu_to_le32(EXT3_XATTR_MAGIC);
+		header(s->base)->h_magic = cpu_to_le32(EXT4_XATTR_MAGIC);
 		header(s->base)->h_blocks = cpu_to_le32(1);
 		header(s->base)->h_refcount = cpu_to_le32(1);
 		s->first = ENTRY(header(s->base)+1);
@@ -747,17 +747,17 @@ ext3_xattr_block_set(handle_t *handle, struct inode *inode,
 		s->end = s->base + sb->s_blocksize;
 	}
 
-	error = ext3_xattr_set_entry(i, s);
+	error = ext4_xattr_set_entry(i, s);
 	if (error == -EIO)
 		goto bad_block;
 	if (error)
 		goto cleanup;
 	if (!IS_LAST_ENTRY(s->first))
-		ext3_xattr_rehash(header(s->base), s->here);
+		ext4_xattr_rehash(header(s->base), s->here);
 
 inserted:
 	if (!IS_LAST_ENTRY(s->first)) {
-		new_bh = ext3_xattr_cache_find(inode, header(s->base), &ce);
+		new_bh = ext4_xattr_cache_find(inode, header(s->base), &ce);
 		if (new_bh) {
 			/* We found an identical block in the cache. */
 			if (new_bh == bs->bh)
@@ -768,7 +768,7 @@ inserted:
 				error = -EDQUOT;
 				if (DQUOT_ALLOC_BLOCK(inode, 1))
 					goto cleanup;
-				error = ext3_journal_get_write_access(handle,
+				error = ext4_journal_get_write_access(handle,
 								      new_bh);
 				if (error)
 					goto cleanup_dquot;
@@ -778,7 +778,7 @@ inserted:
 				ea_bdebug(new_bh, "reusing; refcount now=%d",
 					le32_to_cpu(BHDR(new_bh)->h_refcount));
 				unlock_buffer(new_bh);
-				error = ext3_journal_dirty_metadata(handle,
+				error = ext4_journal_dirty_metadata(handle,
 								    new_bh);
 				if (error)
 					goto cleanup_dquot;
@@ -792,11 +792,11 @@ inserted:
 			get_bh(new_bh);
 		} else {
 			/* We need to allocate a new block */
-			ext3_fsblk_t goal = le32_to_cpu(
-					EXT3_SB(sb)->s_es->s_first_data_block) +
-				(ext3_fsblk_t)EXT3_I(inode)->i_block_group *
-				EXT3_BLOCKS_PER_GROUP(sb);
-			ext3_fsblk_t block = ext3_new_block(handle, inode,
+			ext4_fsblk_t goal = le32_to_cpu(
+					EXT4_SB(sb)->s_es->s_first_data_block) +
+				(ext4_fsblk_t)EXT4_I(inode)->i_block_group *
+				EXT4_BLOCKS_PER_GROUP(sb);
+			ext4_fsblk_t block = ext4_new_block(handle, inode,
 							goal, &error);
 			if (error)
 				goto cleanup;
@@ -805,12 +805,12 @@ inserted:
 			new_bh = sb_getblk(sb, block);
 			if (!new_bh) {
 getblk_failed:
-				ext3_free_blocks(handle, inode, block, 1);
+				ext4_free_blocks(handle, inode, block, 1);
 				error = -EIO;
 				goto cleanup;
 			}
 			lock_buffer(new_bh);
-			error = ext3_journal_get_create_access(handle, new_bh);
+			error = ext4_journal_get_create_access(handle, new_bh);
 			if (error) {
 				unlock_buffer(new_bh);
 				goto getblk_failed;
@@ -818,19 +818,19 @@ getblk_failed:
 			memcpy(new_bh->b_data, s->base, new_bh->b_size);
 			set_buffer_uptodate(new_bh);
 			unlock_buffer(new_bh);
-			ext3_xattr_cache_insert(new_bh);
-			error = ext3_journal_dirty_metadata(handle, new_bh);
+			ext4_xattr_cache_insert(new_bh);
+			error = ext4_journal_dirty_metadata(handle, new_bh);
 			if (error)
 				goto cleanup;
 		}
 	}
 
 	/* Update the inode. */
-	EXT3_I(inode)->i_file_acl = new_bh ? new_bh->b_blocknr : 0;
+	EXT4_I(inode)->i_file_acl = new_bh ? new_bh->b_blocknr : 0;
 
 	/* Drop the previous xattr block. */
 	if (bs->bh && bs->bh != new_bh)
-		ext3_xattr_release_block(handle, inode, bs->bh);
+		ext4_xattr_release_block(handle, inode, bs->bh);
 	error = 0;
 
 cleanup:
@@ -847,40 +847,40 @@ cleanup_dquot:
 	goto cleanup;
 
 bad_block:
-	ext3_error(inode->i_sb, __FUNCTION__,
+	ext4_error(inode->i_sb, __FUNCTION__,
 		   "inode %lu: bad block "E3FSBLK, inode->i_ino,
-		   EXT3_I(inode)->i_file_acl);
+		   EXT4_I(inode)->i_file_acl);
 	goto cleanup;
 
 #undef header
 }
 
-struct ext3_xattr_ibody_find {
-	struct ext3_xattr_search s;
-	struct ext3_iloc iloc;
+struct ext4_xattr_ibody_find {
+	struct ext4_xattr_search s;
+	struct ext4_iloc iloc;
 };
 
 static int
-ext3_xattr_ibody_find(struct inode *inode, struct ext3_xattr_info *i,
-		      struct ext3_xattr_ibody_find *is)
+ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
+		      struct ext4_xattr_ibody_find *is)
 {
-	struct ext3_xattr_ibody_header *header;
-	struct ext3_inode *raw_inode;
+	struct ext4_xattr_ibody_header *header;
+	struct ext4_inode *raw_inode;
 	int error;
 
-	if (EXT3_I(inode)->i_extra_isize == 0)
+	if (EXT4_I(inode)->i_extra_isize == 0)
 		return 0;
-	raw_inode = ext3_raw_inode(&is->iloc);
+	raw_inode = ext4_raw_inode(&is->iloc);
 	header = IHDR(inode, raw_inode);
 	is->s.base = is->s.first = IFIRST(header);
 	is->s.here = is->s.first;
-	is->s.end = (void *)raw_inode + EXT3_SB(inode->i_sb)->s_inode_size;
-	if (EXT3_I(inode)->i_state & EXT3_STATE_XATTR) {
-		error = ext3_xattr_check_names(IFIRST(header), is->s.end);
+	is->s.end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size;
+	if (EXT4_I(inode)->i_state & EXT4_STATE_XATTR) {
+		error = ext4_xattr_check_names(IFIRST(header), is->s.end);
 		if (error)
 			return error;
 		/* Find the named attribute. */
-		error = ext3_xattr_find_entry(&is->s.here, i->name_index,
+		error = ext4_xattr_find_entry(&is->s.here, i->name_index,
 					      i->name, is->s.end -
 					      (void *)is->s.base, 0);
 		if (error && error != -ENODATA)
@@ -891,32 +891,32 @@ ext3_xattr_ibody_find(struct inode *inode, struct ext3_xattr_info *i,
 }
 
 static int
-ext3_xattr_ibody_set(handle_t *handle, struct inode *inode,
-		     struct ext3_xattr_info *i,
-		     struct ext3_xattr_ibody_find *is)
+ext4_xattr_ibody_set(handle_t *handle, struct inode *inode,
+		     struct ext4_xattr_info *i,
+		     struct ext4_xattr_ibody_find *is)
 {
-	struct ext3_xattr_ibody_header *header;
-	struct ext3_xattr_search *s = &is->s;
+	struct ext4_xattr_ibody_header *header;
+	struct ext4_xattr_search *s = &is->s;
 	int error;
 
-	if (EXT3_I(inode)->i_extra_isize == 0)
+	if (EXT4_I(inode)->i_extra_isize == 0)
 		return -ENOSPC;
-	error = ext3_xattr_set_entry(i, s);
+	error = ext4_xattr_set_entry(i, s);
 	if (error)
 		return error;
-	header = IHDR(inode, ext3_raw_inode(&is->iloc));
+	header = IHDR(inode, ext4_raw_inode(&is->iloc));
 	if (!IS_LAST_ENTRY(s->first)) {
-		header->h_magic = cpu_to_le32(EXT3_XATTR_MAGIC);
-		EXT3_I(inode)->i_state |= EXT3_STATE_XATTR;
+		header->h_magic = cpu_to_le32(EXT4_XATTR_MAGIC);
+		EXT4_I(inode)->i_state |= EXT4_STATE_XATTR;
 	} else {
 		header->h_magic = cpu_to_le32(0);
-		EXT3_I(inode)->i_state &= ~EXT3_STATE_XATTR;
+		EXT4_I(inode)->i_state &= ~EXT4_STATE_XATTR;
 	}
 	return 0;
 }
 
 /*
- * ext3_xattr_set_handle()
+ * ext4_xattr_set_handle()
  *
  * Create, replace or remove an extended attribute for this inode. Buffer
  * is NULL to remove an existing extended attribute, and non-NULL to
@@ -928,21 +928,21 @@ ext3_xattr_ibody_set(handle_t *handle, struct inode *inode,
  * Returns 0, or a negative error number on failure.
  */
 int
-ext3_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
+ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
 		      const char *name, const void *value, size_t value_len,
 		      int flags)
 {
-	struct ext3_xattr_info i = {
+	struct ext4_xattr_info i = {
 		.name_index = name_index,
 		.name = name,
 		.value = value,
 		.value_len = value_len,
 
 	};
-	struct ext3_xattr_ibody_find is = {
+	struct ext4_xattr_ibody_find is = {
 		.s = { .not_found = -ENODATA, },
 	};
-	struct ext3_xattr_block_find bs = {
+	struct ext4_xattr_block_find bs = {
 		.s = { .not_found = -ENODATA, },
 	};
 	int error;
@@ -951,22 +951,22 @@ ext3_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
 		return -EINVAL;
 	if (strlen(name) > 255)
 		return -ERANGE;
-	down_write(&EXT3_I(inode)->xattr_sem);
-	error = ext3_get_inode_loc(inode, &is.iloc);
+	down_write(&EXT4_I(inode)->xattr_sem);
+	error = ext4_get_inode_loc(inode, &is.iloc);
 	if (error)
 		goto cleanup;
 
-	if (EXT3_I(inode)->i_state & EXT3_STATE_NEW) {
-		struct ext3_inode *raw_inode = ext3_raw_inode(&is.iloc);
-		memset(raw_inode, 0, EXT3_SB(inode->i_sb)->s_inode_size);
-		EXT3_I(inode)->i_state &= ~EXT3_STATE_NEW;
+	if (EXT4_I(inode)->i_state & EXT4_STATE_NEW) {
+		struct ext4_inode *raw_inode = ext4_raw_inode(&is.iloc);
+		memset(raw_inode, 0, EXT4_SB(inode->i_sb)->s_inode_size);
+		EXT4_I(inode)->i_state &= ~EXT4_STATE_NEW;
 	}
 
-	error = ext3_xattr_ibody_find(inode, &i, &is);
+	error = ext4_xattr_ibody_find(inode, &i, &is);
 	if (error)
 		goto cleanup;
 	if (is.s.not_found)
-		error = ext3_xattr_block_find(inode, &i, &bs);
+		error = ext4_xattr_block_find(inode, &i, &bs);
 	if (error)
 		goto cleanup;
 	if (is.s.not_found && bs.s.not_found) {
@@ -981,36 +981,36 @@ ext3_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
 		if (flags & XATTR_CREATE)
 			goto cleanup;
 	}
-	error = ext3_journal_get_write_access(handle, is.iloc.bh);
+	error = ext4_journal_get_write_access(handle, is.iloc.bh);
 	if (error)
 		goto cleanup;
 	if (!value) {
 		if (!is.s.not_found)
-			error = ext3_xattr_ibody_set(handle, inode, &i, &is);
+			error = ext4_xattr_ibody_set(handle, inode, &i, &is);
 		else if (!bs.s.not_found)
-			error = ext3_xattr_block_set(handle, inode, &i, &bs);
+			error = ext4_xattr_block_set(handle, inode, &i, &bs);
 	} else {
-		error = ext3_xattr_ibody_set(handle, inode, &i, &is);
+		error = ext4_xattr_ibody_set(handle, inode, &i, &is);
 		if (!error && !bs.s.not_found) {
 			i.value = NULL;
-			error = ext3_xattr_block_set(handle, inode, &i, &bs);
+			error = ext4_xattr_block_set(handle, inode, &i, &bs);
 		} else if (error == -ENOSPC) {
-			error = ext3_xattr_block_set(handle, inode, &i, &bs);
+			error = ext4_xattr_block_set(handle, inode, &i, &bs);
 			if (error)
 				goto cleanup;
 			if (!is.s.not_found) {
 				i.value = NULL;
-				error = ext3_xattr_ibody_set(handle, inode, &i,
+				error = ext4_xattr_ibody_set(handle, inode, &i,
 							     &is);
 			}
 		}
 	}
 	if (!error) {
-		ext3_xattr_update_super_block(handle, inode->i_sb);
+		ext4_xattr_update_super_block(handle, inode->i_sb);
 		inode->i_ctime = CURRENT_TIME_SEC;
-		error = ext3_mark_iloc_dirty(handle, inode, &is.iloc);
+		error = ext4_mark_iloc_dirty(handle, inode, &is.iloc);
 		/*
-		 * The bh is consumed by ext3_mark_iloc_dirty, even with
+		 * The bh is consumed by ext4_mark_iloc_dirty, even with
 		 * error != 0.
 		 */
 		is.iloc.bh = NULL;
@@ -1021,37 +1021,37 @@ ext3_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
 cleanup:
 	brelse(is.iloc.bh);
 	brelse(bs.bh);
-	up_write(&EXT3_I(inode)->xattr_sem);
+	up_write(&EXT4_I(inode)->xattr_sem);
 	return error;
 }
 
 /*
- * ext3_xattr_set()
+ * ext4_xattr_set()
  *
- * Like ext3_xattr_set_handle, but start from an inode. This extended
+ * Like ext4_xattr_set_handle, but start from an inode. This extended
  * attribute modification is a filesystem transaction by itself.
  *
  * Returns 0, or a negative error number on failure.
  */
 int
-ext3_xattr_set(struct inode *inode, int name_index, const char *name,
+ext4_xattr_set(struct inode *inode, int name_index, const char *name,
 	       const void *value, size_t value_len, int flags)
 {
 	handle_t *handle;
 	int error, retries = 0;
 
 retry:
-	handle = ext3_journal_start(inode, EXT3_DATA_TRANS_BLOCKS(inode->i_sb));
+	handle = ext4_journal_start(inode, EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
 	if (IS_ERR(handle)) {
 		error = PTR_ERR(handle);
 	} else {
 		int error2;
 
-		error = ext3_xattr_set_handle(handle, inode, name_index, name,
+		error = ext4_xattr_set_handle(handle, inode, name_index, name,
 					      value, value_len, flags);
-		error2 = ext3_journal_stop(handle);
+		error2 = ext4_journal_stop(handle);
 		if (error == -ENOSPC &&
-		    ext3_should_retry_alloc(inode->i_sb, &retries))
+		    ext4_should_retry_alloc(inode->i_sb, &retries))
 			goto retry;
 		if (error == 0)
 			error = error2;
@@ -1061,53 +1061,53 @@ retry:
 }
 
 /*
- * ext3_xattr_delete_inode()
+ * ext4_xattr_delete_inode()
  *
  * Free extended attribute resources associated with this inode. This
  * is called immediately before an inode is freed. We have exclusive
  * access to the inode.
  */
 void
-ext3_xattr_delete_inode(handle_t *handle, struct inode *inode)
+ext4_xattr_delete_inode(handle_t *handle, struct inode *inode)
 {
 	struct buffer_head *bh = NULL;
 
-	if (!EXT3_I(inode)->i_file_acl)
+	if (!EXT4_I(inode)->i_file_acl)
 		goto cleanup;
-	bh = sb_bread(inode->i_sb, EXT3_I(inode)->i_file_acl);
+	bh = sb_bread(inode->i_sb, EXT4_I(inode)->i_file_acl);
 	if (!bh) {
-		ext3_error(inode->i_sb, __FUNCTION__,
+		ext4_error(inode->i_sb, __FUNCTION__,
 			"inode %lu: block "E3FSBLK" read error", inode->i_ino,
-			EXT3_I(inode)->i_file_acl);
+			EXT4_I(inode)->i_file_acl);
 		goto cleanup;
 	}
-	if (BHDR(bh)->h_magic != cpu_to_le32(EXT3_XATTR_MAGIC) ||
+	if (BHDR(bh)->h_magic != cpu_to_le32(EXT4_XATTR_MAGIC) ||
 	    BHDR(bh)->h_blocks != cpu_to_le32(1)) {
-		ext3_error(inode->i_sb, __FUNCTION__,
+		ext4_error(inode->i_sb, __FUNCTION__,
 			"inode %lu: bad block "E3FSBLK, inode->i_ino,
-			EXT3_I(inode)->i_file_acl);
+			EXT4_I(inode)->i_file_acl);
 		goto cleanup;
 	}
-	ext3_xattr_release_block(handle, inode, bh);
-	EXT3_I(inode)->i_file_acl = 0;
+	ext4_xattr_release_block(handle, inode, bh);
+	EXT4_I(inode)->i_file_acl = 0;
 
 cleanup:
 	brelse(bh);
 }
 
 /*
- * ext3_xattr_put_super()
+ * ext4_xattr_put_super()
  *
  * This is called when a file system is unmounted.
  */
 void
-ext3_xattr_put_super(struct super_block *sb)
+ext4_xattr_put_super(struct super_block *sb)
 {
 	mb_cache_shrink(sb->s_bdev);
 }
 
 /*
- * ext3_xattr_cache_insert()
+ * ext4_xattr_cache_insert()
  *
  * Create a new entry in the extended attribute cache, and insert
  * it unless such an entry is already in the cache.
@@ -1115,13 +1115,13 @@ ext3_xattr_put_super(struct super_block *sb)
  * Returns 0, or a negative error number on failure.
  */
 static void
-ext3_xattr_cache_insert(struct buffer_head *bh)
+ext4_xattr_cache_insert(struct buffer_head *bh)
 {
 	__u32 hash = le32_to_cpu(BHDR(bh)->h_hash);
 	struct mb_cache_entry *ce;
 	int error;
 
-	ce = mb_cache_entry_alloc(ext3_xattr_cache);
+	ce = mb_cache_entry_alloc(ext4_xattr_cache);
 	if (!ce) {
 		ea_bdebug(bh, "out of memory");
 		return;
@@ -1140,7 +1140,7 @@ ext3_xattr_cache_insert(struct buffer_head *bh)
 }
 
 /*
- * ext3_xattr_cmp()
+ * ext4_xattr_cmp()
  *
  * Compare two extended attribute blocks for equality.
  *
@@ -1148,10 +1148,10 @@ ext3_xattr_cache_insert(struct buffer_head *bh)
  * a negative error number on errors.
  */
 static int
-ext3_xattr_cmp(struct ext3_xattr_header *header1,
-	       struct ext3_xattr_header *header2)
+ext4_xattr_cmp(struct ext4_xattr_header *header1,
+	       struct ext4_xattr_header *header2)
 {
-	struct ext3_xattr_entry *entry1, *entry2;
+	struct ext4_xattr_entry *entry1, *entry2;
 
 	entry1 = ENTRY(header1+1);
 	entry2 = ENTRY(header2+1);
@@ -1171,8 +1171,8 @@ ext3_xattr_cmp(struct ext3_xattr_header *header1,
 			   le32_to_cpu(entry1->e_value_size)))
 			return 1;
 
-		entry1 = EXT3_XATTR_NEXT(entry1);
-		entry2 = EXT3_XATTR_NEXT(entry2);
+		entry1 = EXT4_XATTR_NEXT(entry1);
+		entry2 = EXT4_XATTR_NEXT(entry2);
 	}
 	if (!IS_LAST_ENTRY(entry2))
 		return 1;
@@ -1180,7 +1180,7 @@ ext3_xattr_cmp(struct ext3_xattr_header *header1,
 }
 
 /*
- * ext3_xattr_cache_find()
+ * ext4_xattr_cache_find()
  *
  * Find an identical extended attribute block.
  *
@@ -1188,7 +1188,7 @@ ext3_xattr_cmp(struct ext3_xattr_header *header1,
  * not found or an error occurred.
  */
 static struct buffer_head *
-ext3_xattr_cache_find(struct inode *inode, struct ext3_xattr_header *header,
+ext4_xattr_cache_find(struct inode *inode, struct ext4_xattr_header *header,
 		      struct mb_cache_entry **pce)
 {
 	__u32 hash = le32_to_cpu(header->h_hash);
@@ -1198,7 +1198,7 @@ ext3_xattr_cache_find(struct inode *inode, struct ext3_xattr_header *header,
 		return NULL;  /* never share */
 	ea_idebug(inode, "looking for cached blocks [%x]", (int)hash);
 again:
-	ce = mb_cache_entry_find_first(ext3_xattr_cache, 0,
+	ce = mb_cache_entry_find_first(ext4_xattr_cache, 0,
 				       inode->i_sb->s_bdev, hash);
 	while (ce) {
 		struct buffer_head *bh;
@@ -1210,16 +1210,16 @@ again:
 		}
 		bh = sb_bread(inode->i_sb, ce->e_block);
 		if (!bh) {
-			ext3_error(inode->i_sb, __FUNCTION__,
+			ext4_error(inode->i_sb, __FUNCTION__,
 				"inode %lu: block %lu read error",
 				inode->i_ino, (unsigned long) ce->e_block);
 		} else if (le32_to_cpu(BHDR(bh)->h_refcount) >=
-				EXT3_XATTR_REFCOUNT_MAX) {
+				EXT4_XATTR_REFCOUNT_MAX) {
 			ea_idebug(inode, "block %lu refcount %d>=%d",
 				  (unsigned long) ce->e_block,
 				  le32_to_cpu(BHDR(bh)->h_refcount),
-					  EXT3_XATTR_REFCOUNT_MAX);
-		} else if (ext3_xattr_cmp(header, BHDR(bh)) == 0) {
+					  EXT4_XATTR_REFCOUNT_MAX);
+		} else if (ext4_xattr_cmp(header, BHDR(bh)) == 0) {
 			*pce = ce;
 			return bh;
 		}
@@ -1233,12 +1233,12 @@ again:
 #define VALUE_HASH_SHIFT 16
 
 /*
- * ext3_xattr_hash_entry()
+ * ext4_xattr_hash_entry()
  *
  * Compute the hash of an extended attribute.
  */
-static inline void ext3_xattr_hash_entry(struct ext3_xattr_header *header,
-					 struct ext3_xattr_entry *entry)
+static inline void ext4_xattr_hash_entry(struct ext4_xattr_header *header,
+					 struct ext4_xattr_entry *entry)
 {
 	__u32 hash = 0;
 	char *name = entry->e_name;
@@ -1254,7 +1254,7 @@ static inline void ext3_xattr_hash_entry(struct ext3_xattr_header *header,
 		__le32 *value = (__le32 *)((char *)header +
 			le16_to_cpu(entry->e_value_offs));
 		for (n = (le32_to_cpu(entry->e_value_size) +
-		     EXT3_XATTR_ROUND) >> EXT3_XATTR_PAD_BITS; n; n--) {
+		     EXT4_XATTR_ROUND) >> EXT4_XATTR_PAD_BITS; n; n--) {
 			hash = (hash << VALUE_HASH_SHIFT) ^
 			       (hash >> (8*sizeof(hash) - VALUE_HASH_SHIFT)) ^
 			       le32_to_cpu(*value++);
@@ -1269,17 +1269,17 @@ static inline void ext3_xattr_hash_entry(struct ext3_xattr_header *header,
 #define BLOCK_HASH_SHIFT 16
 
 /*
- * ext3_xattr_rehash()
+ * ext4_xattr_rehash()
  *
  * Re-compute the extended attribute hash value after an entry has changed.
  */
-static void ext3_xattr_rehash(struct ext3_xattr_header *header,
-			      struct ext3_xattr_entry *entry)
+static void ext4_xattr_rehash(struct ext4_xattr_header *header,
+			      struct ext4_xattr_entry *entry)
 {
-	struct ext3_xattr_entry *here;
+	struct ext4_xattr_entry *here;
 	__u32 hash = 0;
 
-	ext3_xattr_hash_entry(header, entry);
+	ext4_xattr_hash_entry(header, entry);
 	here = ENTRY(header+1);
 	while (!IS_LAST_ENTRY(here)) {
 		if (!here->e_hash) {
@@ -1290,7 +1290,7 @@ static void ext3_xattr_rehash(struct ext3_xattr_header *header,
 		hash = (hash << BLOCK_HASH_SHIFT) ^
 		       (hash >> (8*sizeof(hash) - BLOCK_HASH_SHIFT)) ^
 		       le32_to_cpu(here->e_hash);
-		here = EXT3_XATTR_NEXT(here);
+		here = EXT4_XATTR_NEXT(here);
 	}
 	header->h_hash = cpu_to_le32(hash);
 }
@@ -1298,20 +1298,20 @@ static void ext3_xattr_rehash(struct ext3_xattr_header *header,
 #undef BLOCK_HASH_SHIFT
 
 int __init
-init_ext3_xattr(void)
+init_ext4_xattr(void)
 {
-	ext3_xattr_cache = mb_cache_create("ext3_xattr", NULL,
+	ext4_xattr_cache = mb_cache_create("ext4_xattr", NULL,
 		sizeof(struct mb_cache_entry) +
 		sizeof(((struct mb_cache_entry *) 0)->e_indexes[0]), 1, 6);
-	if (!ext3_xattr_cache)
+	if (!ext4_xattr_cache)
 		return -ENOMEM;
 	return 0;
 }
 
 void
-exit_ext3_xattr(void)
+exit_ext4_xattr(void)
 {
-	if (ext3_xattr_cache)
-		mb_cache_destroy(ext3_xattr_cache);
-	ext3_xattr_cache = NULL;
+	if (ext4_xattr_cache)
+		mb_cache_destroy(ext4_xattr_cache);
+	ext4_xattr_cache = NULL;
 }
diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index 6b1ae1c..79432b3 100644
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -1,7 +1,7 @@
 /*
-  File: fs/ext3/xattr.h
+  File: fs/ext4/xattr.h
 
-  On-disk format of extended attributes for the ext3 filesystem.
+  On-disk format of extended attributes for the ext4 filesystem.
 
   (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>
 */
@@ -9,20 +9,20 @@
 #include <linux/xattr.h>
 
 /* Magic value in attribute blocks */
-#define EXT3_XATTR_MAGIC		0xEA020000
+#define EXT4_XATTR_MAGIC		0xEA020000
 
 /* Maximum number of references to one attribute block */
-#define EXT3_XATTR_REFCOUNT_MAX		1024
+#define EXT4_XATTR_REFCOUNT_MAX		1024
 
 /* Name indexes */
-#define EXT3_XATTR_INDEX_USER			1
-#define EXT3_XATTR_INDEX_POSIX_ACL_ACCESS	2
-#define EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT	3
-#define EXT3_XATTR_INDEX_TRUSTED		4
-#define	EXT3_XATTR_INDEX_LUSTRE			5
-#define EXT3_XATTR_INDEX_SECURITY	        6
-
-struct ext3_xattr_header {
+#define EXT4_XATTR_INDEX_USER			1
+#define EXT4_XATTR_INDEX_POSIX_ACL_ACCESS	2
+#define EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT	3
+#define EXT4_XATTR_INDEX_TRUSTED		4
+#define	EXT4_XATTR_INDEX_LUSTRE			5
+#define EXT4_XATTR_INDEX_SECURITY	        6
+
+struct ext4_xattr_header {
 	__le32	h_magic;	/* magic number for identification */
 	__le32	h_refcount;	/* reference count */
 	__le32	h_blocks;	/* number of disk blocks used */
@@ -30,11 +30,11 @@ struct ext3_xattr_header {
 	__u32	h_reserved[4];	/* zero right now */
 };
 
-struct ext3_xattr_ibody_header {
+struct ext4_xattr_ibody_header {
 	__le32	h_magic;	/* magic number for identification */
 };
 
-struct ext3_xattr_entry {
+struct ext4_xattr_entry {
 	__u8	e_name_len;	/* length of name */
 	__u8	e_name_index;	/* attribute name index */
 	__le16	e_value_offs;	/* offset in disk block of value */
@@ -44,100 +44,100 @@ struct ext3_xattr_entry {
 	char	e_name[0];	/* attribute name */
 };
 
-#define EXT3_XATTR_PAD_BITS		2
-#define EXT3_XATTR_PAD		(1<<EXT3_XATTR_PAD_BITS)
-#define EXT3_XATTR_ROUND		(EXT3_XATTR_PAD-1)
-#define EXT3_XATTR_LEN(name_len) \
-	(((name_len) + EXT3_XATTR_ROUND + \
-	sizeof(struct ext3_xattr_entry)) & ~EXT3_XATTR_ROUND)
-#define EXT3_XATTR_NEXT(entry) \
-	( (struct ext3_xattr_entry *)( \
-	  (char *)(entry) + EXT3_XATTR_LEN((entry)->e_name_len)) )
-#define EXT3_XATTR_SIZE(size) \
-	(((size) + EXT3_XATTR_ROUND) & ~EXT3_XATTR_ROUND)
+#define EXT4_XATTR_PAD_BITS		2
+#define EXT4_XATTR_PAD		(1<<EXT4_XATTR_PAD_BITS)
+#define EXT4_XATTR_ROUND		(EXT4_XATTR_PAD-1)
+#define EXT4_XATTR_LEN(name_len) \
+	(((name_len) + EXT4_XATTR_ROUND + \
+	sizeof(struct ext4_xattr_entry)) & ~EXT4_XATTR_ROUND)
+#define EXT4_XATTR_NEXT(entry) \
+	( (struct ext4_xattr_entry *)( \
+	  (char *)(entry) + EXT4_XATTR_LEN((entry)->e_name_len)) )
+#define EXT4_XATTR_SIZE(size) \
+	(((size) + EXT4_XATTR_ROUND) & ~EXT4_XATTR_ROUND)
 
-# ifdef CONFIG_EXT3_FS_XATTR
+# ifdef CONFIG_EXT4DEV_FS_XATTR
 
-extern struct xattr_handler ext3_xattr_user_handler;
-extern struct xattr_handler ext3_xattr_trusted_handler;
-extern struct xattr_handler ext3_xattr_acl_access_handler;
-extern struct xattr_handler ext3_xattr_acl_default_handler;
-extern struct xattr_handler ext3_xattr_security_handler;
+extern struct xattr_handler ext4_xattr_user_handler;
+extern struct xattr_handler ext4_xattr_trusted_handler;
+extern struct xattr_handler ext4_xattr_acl_access_handler;
+extern struct xattr_handler ext4_xattr_acl_default_handler;
+extern struct xattr_handler ext4_xattr_security_handler;
 
-extern ssize_t ext3_listxattr(struct dentry *, char *, size_t);
+extern ssize_t ext4_listxattr(struct dentry *, char *, size_t);
 
-extern int ext3_xattr_get(struct inode *, int, const char *, void *, size_t);
-extern int ext3_xattr_list(struct inode *, char *, size_t);
-extern int ext3_xattr_set(struct inode *, int, const char *, const void *, size_t, int);
-extern int ext3_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int);
+extern int ext4_xattr_get(struct inode *, int, const char *, void *, size_t);
+extern int ext4_xattr_list(struct inode *, char *, size_t);
+extern int ext4_xattr_set(struct inode *, int, const char *, const void *, size_t, int);
+extern int ext4_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int);
 
-extern void ext3_xattr_delete_inode(handle_t *, struct inode *);
-extern void ext3_xattr_put_super(struct super_block *);
+extern void ext4_xattr_delete_inode(handle_t *, struct inode *);
+extern void ext4_xattr_put_super(struct super_block *);
 
-extern int init_ext3_xattr(void);
-extern void exit_ext3_xattr(void);
+extern int init_ext4_xattr(void);
+extern void exit_ext4_xattr(void);
 
-extern struct xattr_handler *ext3_xattr_handlers[];
+extern struct xattr_handler *ext4_xattr_handlers[];
 
-# else  /* CONFIG_EXT3_FS_XATTR */
+# else  /* CONFIG_EXT4DEV_FS_XATTR */
 
 static inline int
-ext3_xattr_get(struct inode *inode, int name_index, const char *name,
+ext4_xattr_get(struct inode *inode, int name_index, const char *name,
 	       void *buffer, size_t size, int flags)
 {
 	return -EOPNOTSUPP;
 }
 
 static inline int
-ext3_xattr_list(struct inode *inode, void *buffer, size_t size)
+ext4_xattr_list(struct inode *inode, void *buffer, size_t size)
 {
 	return -EOPNOTSUPP;
 }
 
 static inline int
-ext3_xattr_set(struct inode *inode, int name_index, const char *name,
+ext4_xattr_set(struct inode *inode, int name_index, const char *name,
 	       const void *value, size_t size, int flags)
 {
 	return -EOPNOTSUPP;
 }
 
 static inline int
-ext3_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
+ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
 	       const char *name, const void *value, size_t size, int flags)
 {
 	return -EOPNOTSUPP;
 }
 
 static inline void
-ext3_xattr_delete_inode(handle_t *handle, struct inode *inode)
+ext4_xattr_delete_inode(handle_t *handle, struct inode *inode)
 {
 }
 
 static inline void
-ext3_xattr_put_super(struct super_block *sb)
+ext4_xattr_put_super(struct super_block *sb)
 {
 }
 
 static inline int
-init_ext3_xattr(void)
+init_ext4_xattr(void)
 {
 	return 0;
 }
 
 static inline void
-exit_ext3_xattr(void)
+exit_ext4_xattr(void)
 {
 }
 
-#define ext3_xattr_handlers	NULL
+#define ext4_xattr_handlers	NULL
 
-# endif  /* CONFIG_EXT3_FS_XATTR */
+# endif  /* CONFIG_EXT4DEV_FS_XATTR */
 
-#ifdef CONFIG_EXT3_FS_SECURITY
-extern int ext3_init_security(handle_t *handle, struct inode *inode,
+#ifdef CONFIG_EXT4DEV_FS_SECURITY
+extern int ext4_init_security(handle_t *handle, struct inode *inode,
 				struct inode *dir);
 #else
-static inline int ext3_init_security(handle_t *handle, struct inode *inode,
+static inline int ext4_init_security(handle_t *handle, struct inode *inode,
 				struct inode *dir)
 {
 	return 0;
diff --git a/fs/ext4/xattr_security.c b/fs/ext4/xattr_security.c
index b9c40c1..d84b1da 100644
--- a/fs/ext4/xattr_security.c
+++ b/fs/ext4/xattr_security.c
@@ -1,5 +1,5 @@
 /*
- * linux/fs/ext3/xattr_security.c
+ * linux/fs/ext4/xattr_security.c
  * Handler for storing security labels as extended attributes.
  */
 
@@ -7,13 +7,13 @@
 #include <linux/string.h>
 #include <linux/fs.h>
 #include <linux/smp_lock.h>
-#include <linux/ext3_jbd.h>
-#include <linux/ext3_fs.h>
+#include <linux/ext4_jbd.h>
+#include <linux/ext4_fs.h>
 #include <linux/security.h>
 #include "xattr.h"
 
 static size_t
-ext3_xattr_security_list(struct inode *inode, char *list, size_t list_size,
+ext4_xattr_security_list(struct inode *inode, char *list, size_t list_size,
 			 const char *name, size_t name_len)
 {
 	const size_t prefix_len = sizeof(XATTR_SECURITY_PREFIX)-1;
@@ -29,27 +29,27 @@ ext3_xattr_security_list(struct inode *inode, char *list, size_t list_size,
 }
 
 static int
-ext3_xattr_security_get(struct inode *inode, const char *name,
+ext4_xattr_security_get(struct inode *inode, const char *name,
 		       void *buffer, size_t size)
 {
 	if (strcmp(name, "") == 0)
 		return -EINVAL;
-	return ext3_xattr_get(inode, EXT3_XATTR_INDEX_SECURITY, name,
+	return ext4_xattr_get(inode, EXT4_XATTR_INDEX_SECURITY, name,
 			      buffer, size);
 }
 
 static int
-ext3_xattr_security_set(struct inode *inode, const char *name,
+ext4_xattr_security_set(struct inode *inode, const char *name,
 		       const void *value, size_t size, int flags)
 {
 	if (strcmp(name, "") == 0)
 		return -EINVAL;
-	return ext3_xattr_set(inode, EXT3_XATTR_INDEX_SECURITY, name,
+	return ext4_xattr_set(inode, EXT4_XATTR_INDEX_SECURITY, name,
 			      value, size, flags);
 }
 
 int
-ext3_init_security(handle_t *handle, struct inode *inode, struct inode *dir)
+ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir)
 {
 	int err;
 	size_t len;
@@ -62,16 +62,16 @@ ext3_init_security(handle_t *handle, struct inode *inode, struct inode *dir)
 			return 0;
 		return err;
 	}
-	err = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_SECURITY,
+	err = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_SECURITY,
 				    name, value, len, 0);
 	kfree(name);
 	kfree(value);
 	return err;
 }
 
-struct xattr_handler ext3_xattr_security_handler = {
+struct xattr_handler ext4_xattr_security_handler = {
 	.prefix	= XATTR_SECURITY_PREFIX,
-	.list	= ext3_xattr_security_list,
-	.get	= ext3_xattr_security_get,
-	.set	= ext3_xattr_security_set,
+	.list	= ext4_xattr_security_list,
+	.get	= ext4_xattr_security_get,
+	.set	= ext4_xattr_security_set,
 };
diff --git a/fs/ext4/xattr_trusted.c b/fs/ext4/xattr_trusted.c
index 86d91f1..11bd58c 100644
--- a/fs/ext4/xattr_trusted.c
+++ b/fs/ext4/xattr_trusted.c
@@ -1,5 +1,5 @@
 /*
- * linux/fs/ext3/xattr_trusted.c
+ * linux/fs/ext4/xattr_trusted.c
  * Handler for trusted extended attributes.
  *
  * Copyright (C) 2003 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
@@ -10,14 +10,14 @@
 #include <linux/capability.h>
 #include <linux/fs.h>
 #include <linux/smp_lock.h>
-#include <linux/ext3_jbd.h>
-#include <linux/ext3_fs.h>
+#include <linux/ext4_jbd.h>
+#include <linux/ext4_fs.h>
 #include "xattr.h"
 
 #define XATTR_TRUSTED_PREFIX "trusted."
 
 static size_t
-ext3_xattr_trusted_list(struct inode *inode, char *list, size_t list_size,
+ext4_xattr_trusted_list(struct inode *inode, char *list, size_t list_size,
 			const char *name, size_t name_len)
 {
 	const size_t prefix_len = sizeof(XATTR_TRUSTED_PREFIX)-1;
@@ -35,28 +35,28 @@ ext3_xattr_trusted_list(struct inode *inode, char *list, size_t list_size,
 }
 
 static int
-ext3_xattr_trusted_get(struct inode *inode, const char *name,
+ext4_xattr_trusted_get(struct inode *inode, const char *name,
 		       void *buffer, size_t size)
 {
 	if (strcmp(name, "") == 0)
 		return -EINVAL;
-	return ext3_xattr_get(inode, EXT3_XATTR_INDEX_TRUSTED, name,
+	return ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED, name,
 			      buffer, size);
 }
 
 static int
-ext3_xattr_trusted_set(struct inode *inode, const char *name,
+ext4_xattr_trusted_set(struct inode *inode, const char *name,
 		       const void *value, size_t size, int flags)
 {
 	if (strcmp(name, "") == 0)
 		return -EINVAL;
-	return ext3_xattr_set(inode, EXT3_XATTR_INDEX_TRUSTED, name,
+	return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED, name,
 			      value, size, flags);
 }
 
-struct xattr_handler ext3_xattr_trusted_handler = {
+struct xattr_handler ext4_xattr_trusted_handler = {
 	.prefix	= XATTR_TRUSTED_PREFIX,
-	.list	= ext3_xattr_trusted_list,
-	.get	= ext3_xattr_trusted_get,
-	.set	= ext3_xattr_trusted_set,
+	.list	= ext4_xattr_trusted_list,
+	.get	= ext4_xattr_trusted_get,
+	.set	= ext4_xattr_trusted_set,
 };
diff --git a/fs/ext4/xattr_user.c b/fs/ext4/xattr_user.c
index a85a0a1..9c5a665 100644
--- a/fs/ext4/xattr_user.c
+++ b/fs/ext4/xattr_user.c
@@ -1,5 +1,5 @@
 /*
- * linux/fs/ext3/xattr_user.c
+ * linux/fs/ext4/xattr_user.c
  * Handler for extended user attributes.
  *
  * Copyright (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
@@ -9,14 +9,14 @@
 #include <linux/string.h>
 #include <linux/fs.h>
 #include <linux/smp_lock.h>
-#include <linux/ext3_jbd.h>
-#include <linux/ext3_fs.h>
+#include <linux/ext4_jbd.h>
+#include <linux/ext4_fs.h>
 #include "xattr.h"
 
 #define XATTR_USER_PREFIX "user."
 
 static size_t
-ext3_xattr_user_list(struct inode *inode, char *list, size_t list_size,
+ext4_xattr_user_list(struct inode *inode, char *list, size_t list_size,
 		     const char *name, size_t name_len)
 {
 	const size_t prefix_len = sizeof(XATTR_USER_PREFIX)-1;
@@ -34,31 +34,31 @@ ext3_xattr_user_list(struct inode *inode, char *list, size_t list_size,
 }
 
 static int
-ext3_xattr_user_get(struct inode *inode, const char *name,
+ext4_xattr_user_get(struct inode *inode, const char *name,
 		    void *buffer, size_t size)
 {
 	if (strcmp(name, "") == 0)
 		return -EINVAL;
 	if (!test_opt(inode->i_sb, XATTR_USER))
 		return -EOPNOTSUPP;
-	return ext3_xattr_get(inode, EXT3_XATTR_INDEX_USER, name, buffer, size);
+	return ext4_xattr_get(inode, EXT4_XATTR_INDEX_USER, name, buffer, size);
 }
 
 static int
-ext3_xattr_user_set(struct inode *inode, const char *name,
+ext4_xattr_user_set(struct inode *inode, const char *name,
 		    const void *value, size_t size, int flags)
 {
 	if (strcmp(name, "") == 0)
 		return -EINVAL;
 	if (!test_opt(inode->i_sb, XATTR_USER))
 		return -EOPNOTSUPP;
-	return ext3_xattr_set(inode, EXT3_XATTR_INDEX_USER, name,
+	return ext4_xattr_set(inode, EXT4_XATTR_INDEX_USER, name,
 			      value, size, flags);
 }
 
-struct xattr_handler ext3_xattr_user_handler = {
+struct xattr_handler ext4_xattr_user_handler = {
 	.prefix	= XATTR_USER_PREFIX,
-	.list	= ext3_xattr_user_list,
-	.get	= ext3_xattr_user_get,
-	.set	= ext3_xattr_user_set,
+	.list	= ext4_xattr_user_list,
+	.get	= ext4_xattr_user_get,
+	.set	= ext4_xattr_user_set,
 };
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 11cca1b..f582cd7 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -1,5 +1,5 @@
 /*
- *  linux/include/linux/ext3_fs.h
+ *  linux/include/linux/ext4_fs.h
  *
  * Copyright (C) 1992, 1993, 1994, 1995
  * Remy Card (card@masi.ibp.fr)
@@ -13,8 +13,8 @@
  *  Copyright (C) 1991, 1992  Linus Torvalds
  */
 
-#ifndef _LINUX_EXT3_FS_H
-#define _LINUX_EXT3_FS_H
+#ifndef _LINUX_EXT4_FS_H
+#define _LINUX_EXT4_FS_H
 
 #include <linux/types.h>
 #include <linux/magic.h>
@@ -24,102 +24,102 @@
  */
 
 /*
- * Define EXT3FS_DEBUG to produce debug messages
+ * Define EXT4FS_DEBUG to produce debug messages
  */
-#undef EXT3FS_DEBUG
+#undef EXT4FS_DEBUG
 
 /*
- * Define EXT3_RESERVATION to reserve data blocks for expanding files
+ * Define EXT4_RESERVATION to reserve data blocks for expanding files
  */
-#define EXT3_DEFAULT_RESERVE_BLOCKS     8
+#define EXT4_DEFAULT_RESERVE_BLOCKS     8
 /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
-#define EXT3_MAX_RESERVE_BLOCKS         1027
-#define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0
+#define EXT4_MAX_RESERVE_BLOCKS         1027
+#define EXT4_RESERVE_WINDOW_NOT_ALLOCATED 0
 /*
  * Always enable hashed directories
  */
-#define CONFIG_EXT3_INDEX
+#define CONFIG_EXT4_INDEX
 
 /*
  * Debug code
  */
-#ifdef EXT3FS_DEBUG
-#define ext3_debug(f, a...)						\
+#ifdef EXT4FS_DEBUG
+#define ext4_debug(f, a...)						\
 	do {								\
-		printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:",	\
+		printk (KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:",	\
 			__FILE__, __LINE__, __FUNCTION__);		\
 		printk (KERN_DEBUG f, ## a);				\
 	} while (0)
 #else
-#define ext3_debug(f, a...)	do {} while (0)
+#define ext4_debug(f, a...)	do {} while (0)
 #endif
 
 /*
  * Special inodes numbers
  */
-#define	EXT3_BAD_INO		 1	/* Bad blocks inode */
-#define EXT3_ROOT_INO		 2	/* Root inode */
-#define EXT3_BOOT_LOADER_INO	 5	/* Boot loader inode */
-#define EXT3_UNDEL_DIR_INO	 6	/* Undelete directory inode */
-#define EXT3_RESIZE_INO		 7	/* Reserved group descriptors inode */
-#define EXT3_JOURNAL_INO	 8	/* Journal inode */
+#define	EXT4_BAD_INO		 1	/* Bad blocks inode */
+#define EXT4_ROOT_INO		 2	/* Root inode */
+#define EXT4_BOOT_LOADER_INO	 5	/* Boot loader inode */
+#define EXT4_UNDEL_DIR_INO	 6	/* Undelete directory inode */
+#define EXT4_RESIZE_INO		 7	/* Reserved group descriptors inode */
+#define EXT4_JOURNAL_INO	 8	/* Journal inode */
 
-/* First non-reserved inode for old ext3 filesystems */
-#define EXT3_GOOD_OLD_FIRST_INO	11
+/* First non-reserved inode for old ext4 filesystems */
+#define EXT4_GOOD_OLD_FIRST_INO	11
 
 /*
  * Maximal count of links to a file
  */
-#define EXT3_LINK_MAX		32000
+#define EXT4_LINK_MAX		32000
 
 /*
  * Macro-instructions used to manage several block sizes
  */
-#define EXT3_MIN_BLOCK_SIZE		1024
-#define	EXT3_MAX_BLOCK_SIZE		4096
-#define EXT3_MIN_BLOCK_LOG_SIZE		  10
+#define EXT4_MIN_BLOCK_SIZE		1024
+#define	EXT4_MAX_BLOCK_SIZE		4096
+#define EXT4_MIN_BLOCK_LOG_SIZE		  10
 #ifdef __KERNEL__
-# define EXT3_BLOCK_SIZE(s)		((s)->s_blocksize)
+# define EXT4_BLOCK_SIZE(s)		((s)->s_blocksize)
 #else
-# define EXT3_BLOCK_SIZE(s)		(EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
+# define EXT4_BLOCK_SIZE(s)		(EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size)
 #endif
-#define	EXT3_ADDR_PER_BLOCK(s)		(EXT3_BLOCK_SIZE(s) / sizeof (__u32))
+#define	EXT4_ADDR_PER_BLOCK(s)		(EXT4_BLOCK_SIZE(s) / sizeof (__u32))
 #ifdef __KERNEL__
-# define EXT3_BLOCK_SIZE_BITS(s)	((s)->s_blocksize_bits)
+# define EXT4_BLOCK_SIZE_BITS(s)	((s)->s_blocksize_bits)
 #else
-# define EXT3_BLOCK_SIZE_BITS(s)	((s)->s_log_block_size + 10)
+# define EXT4_BLOCK_SIZE_BITS(s)	((s)->s_log_block_size + 10)
 #endif
 #ifdef __KERNEL__
-#define	EXT3_ADDR_PER_BLOCK_BITS(s)	(EXT3_SB(s)->s_addr_per_block_bits)
-#define EXT3_INODE_SIZE(s)		(EXT3_SB(s)->s_inode_size)
-#define EXT3_FIRST_INO(s)		(EXT3_SB(s)->s_first_ino)
+#define	EXT4_ADDR_PER_BLOCK_BITS(s)	(EXT4_SB(s)->s_addr_per_block_bits)
+#define EXT4_INODE_SIZE(s)		(EXT4_SB(s)->s_inode_size)
+#define EXT4_FIRST_INO(s)		(EXT4_SB(s)->s_first_ino)
 #else
-#define EXT3_INODE_SIZE(s)	(((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
-				 EXT3_GOOD_OLD_INODE_SIZE : \
+#define EXT4_INODE_SIZE(s)	(((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \
+				 EXT4_GOOD_OLD_INODE_SIZE : \
 				 (s)->s_inode_size)
-#define EXT3_FIRST_INO(s)	(((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
-				 EXT3_GOOD_OLD_FIRST_INO : \
+#define EXT4_FIRST_INO(s)	(((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \
+				 EXT4_GOOD_OLD_FIRST_INO : \
 				 (s)->s_first_ino)
 #endif
 
 /*
  * Macro-instructions used to manage fragments
  */
-#define EXT3_MIN_FRAG_SIZE		1024
-#define	EXT3_MAX_FRAG_SIZE		4096
-#define EXT3_MIN_FRAG_LOG_SIZE		  10
+#define EXT4_MIN_FRAG_SIZE		1024
+#define	EXT4_MAX_FRAG_SIZE		4096
+#define EXT4_MIN_FRAG_LOG_SIZE		  10
 #ifdef __KERNEL__
-# define EXT3_FRAG_SIZE(s)		(EXT3_SB(s)->s_frag_size)
-# define EXT3_FRAGS_PER_BLOCK(s)	(EXT3_SB(s)->s_frags_per_block)
+# define EXT4_FRAG_SIZE(s)		(EXT4_SB(s)->s_frag_size)
+# define EXT4_FRAGS_PER_BLOCK(s)	(EXT4_SB(s)->s_frags_per_block)
 #else
-# define EXT3_FRAG_SIZE(s)		(EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size)
-# define EXT3_FRAGS_PER_BLOCK(s)	(EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s))
+# define EXT4_FRAG_SIZE(s)		(EXT4_MIN_FRAG_SIZE << (s)->s_log_frag_size)
+# define EXT4_FRAGS_PER_BLOCK(s)	(EXT4_BLOCK_SIZE(s) / EXT4_FRAG_SIZE(s))
 #endif
 
 /*
  * Structure of a blocks group descriptor
  */
-struct ext3_group_desc
+struct ext4_group_desc
 {
 	__le32	bg_block_bitmap;		/* Blocks bitmap block */
 	__le32	bg_inode_bitmap;		/* Inodes bitmap block */
@@ -135,62 +135,62 @@ struct ext3_group_desc
  * Macro-instructions used to manage group descriptors
  */
 #ifdef __KERNEL__
-# define EXT3_BLOCKS_PER_GROUP(s)	(EXT3_SB(s)->s_blocks_per_group)
-# define EXT3_DESC_PER_BLOCK(s)		(EXT3_SB(s)->s_desc_per_block)
-# define EXT3_INODES_PER_GROUP(s)	(EXT3_SB(s)->s_inodes_per_group)
-# define EXT3_DESC_PER_BLOCK_BITS(s)	(EXT3_SB(s)->s_desc_per_block_bits)
+# define EXT4_BLOCKS_PER_GROUP(s)	(EXT4_SB(s)->s_blocks_per_group)
+# define EXT4_DESC_PER_BLOCK(s)		(EXT4_SB(s)->s_desc_per_block)
+# define EXT4_INODES_PER_GROUP(s)	(EXT4_SB(s)->s_inodes_per_group)
+# define EXT4_DESC_PER_BLOCK_BITS(s)	(EXT4_SB(s)->s_desc_per_block_bits)
 #else
-# define EXT3_BLOCKS_PER_GROUP(s)	((s)->s_blocks_per_group)
-# define EXT3_DESC_PER_BLOCK(s)		(EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc))
-# define EXT3_INODES_PER_GROUP(s)	((s)->s_inodes_per_group)
+# define EXT4_BLOCKS_PER_GROUP(s)	((s)->s_blocks_per_group)
+# define EXT4_DESC_PER_BLOCK(s)		(EXT4_BLOCK_SIZE(s) / sizeof (struct ext4_group_desc))
+# define EXT4_INODES_PER_GROUP(s)	((s)->s_inodes_per_group)
 #endif
 
 /*
  * Constants relative to the data blocks
  */
-#define	EXT3_NDIR_BLOCKS		12
-#define	EXT3_IND_BLOCK			EXT3_NDIR_BLOCKS
-#define	EXT3_DIND_BLOCK			(EXT3_IND_BLOCK + 1)
-#define	EXT3_TIND_BLOCK			(EXT3_DIND_BLOCK + 1)
-#define	EXT3_N_BLOCKS			(EXT3_TIND_BLOCK + 1)
+#define	EXT4_NDIR_BLOCKS		12
+#define	EXT4_IND_BLOCK			EXT4_NDIR_BLOCKS
+#define	EXT4_DIND_BLOCK			(EXT4_IND_BLOCK + 1)
+#define	EXT4_TIND_BLOCK			(EXT4_DIND_BLOCK + 1)
+#define	EXT4_N_BLOCKS			(EXT4_TIND_BLOCK + 1)
 
 /*
  * Inode flags
  */
-#define	EXT3_SECRM_FL			0x00000001 /* Secure deletion */
-#define	EXT3_UNRM_FL			0x00000002 /* Undelete */
-#define	EXT3_COMPR_FL			0x00000004 /* Compress file */
-#define EXT3_SYNC_FL			0x00000008 /* Synchronous updates */
-#define EXT3_IMMUTABLE_FL		0x00000010 /* Immutable file */
-#define EXT3_APPEND_FL			0x00000020 /* writes to file may only append */
-#define EXT3_NODUMP_FL			0x00000040 /* do not dump file */
-#define EXT3_NOATIME_FL			0x00000080 /* do not update atime */
+#define	EXT4_SECRM_FL			0x00000001 /* Secure deletion */
+#define	EXT4_UNRM_FL			0x00000002 /* Undelete */
+#define	EXT4_COMPR_FL			0x00000004 /* Compress file */
+#define EXT4_SYNC_FL			0x00000008 /* Synchronous updates */
+#define EXT4_IMMUTABLE_FL		0x00000010 /* Immutable file */
+#define EXT4_APPEND_FL			0x00000020 /* writes to file may only append */
+#define EXT4_NODUMP_FL			0x00000040 /* do not dump file */
+#define EXT4_NOATIME_FL			0x00000080 /* do not update atime */
 /* Reserved for compression usage... */
-#define EXT3_DIRTY_FL			0x00000100
-#define EXT3_COMPRBLK_FL		0x00000200 /* One or more compressed clusters */
-#define EXT3_NOCOMPR_FL			0x00000400 /* Don't compress */
-#define EXT3_ECOMPR_FL			0x00000800 /* Compression error */
+#define EXT4_DIRTY_FL			0x00000100
+#define EXT4_COMPRBLK_FL		0x00000200 /* One or more compressed clusters */
+#define EXT4_NOCOMPR_FL			0x00000400 /* Don't compress */
+#define EXT4_ECOMPR_FL			0x00000800 /* Compression error */
 /* End compression flags --- maybe not all used */
-#define EXT3_INDEX_FL			0x00001000 /* hash-indexed directory */
-#define EXT3_IMAGIC_FL			0x00002000 /* AFS directory */
-#define EXT3_JOURNAL_DATA_FL		0x00004000 /* file data should be journaled */
-#define EXT3_NOTAIL_FL			0x00008000 /* file tail should not be merged */
-#define EXT3_DIRSYNC_FL			0x00010000 /* dirsync behaviour (directories only) */
-#define EXT3_TOPDIR_FL			0x00020000 /* Top of directory hierarchies*/
-#define EXT3_RESERVED_FL		0x80000000 /* reserved for ext3 lib */
+#define EXT4_INDEX_FL			0x00001000 /* hash-indexed directory */
+#define EXT4_IMAGIC_FL			0x00002000 /* AFS directory */
+#define EXT4_JOURNAL_DATA_FL		0x00004000 /* file data should be journaled */
+#define EXT4_NOTAIL_FL			0x00008000 /* file tail should not be merged */
+#define EXT4_DIRSYNC_FL			0x00010000 /* dirsync behaviour (directories only) */
+#define EXT4_TOPDIR_FL			0x00020000 /* Top of directory hierarchies*/
+#define EXT4_RESERVED_FL		0x80000000 /* reserved for ext4 lib */
 
-#define EXT3_FL_USER_VISIBLE		0x0003DFFF /* User visible flags */
-#define EXT3_FL_USER_MODIFIABLE		0x000380FF /* User modifiable flags */
+#define EXT4_FL_USER_VISIBLE		0x0003DFFF /* User visible flags */
+#define EXT4_FL_USER_MODIFIABLE		0x000380FF /* User modifiable flags */
 
 /*
  * Inode dynamic state flags
  */
-#define EXT3_STATE_JDATA		0x00000001 /* journaled data exists */
-#define EXT3_STATE_NEW			0x00000002 /* inode is newly created */
-#define EXT3_STATE_XATTR		0x00000004 /* has in-inode xattrs */
+#define EXT4_STATE_JDATA		0x00000001 /* journaled data exists */
+#define EXT4_STATE_NEW			0x00000002 /* inode is newly created */
+#define EXT4_STATE_XATTR		0x00000004 /* has in-inode xattrs */
 
 /* Used to pass group descriptor data when online resize is done */
-struct ext3_new_group_input {
+struct ext4_new_group_input {
 	__u32 group;            /* Group number for this data */
 	__u32 block_bitmap;     /* Absolute block number of block bitmap */
 	__u32 inode_bitmap;     /* Absolute block number of inode bitmap */
@@ -200,8 +200,8 @@ struct ext3_new_group_input {
 	__u16 unused;
 };
 
-/* The struct ext3_new_group_input in kernel space, with free_blocks_count */
-struct ext3_new_group_data {
+/* The struct ext4_new_group_input in kernel space, with free_blocks_count */
+struct ext4_new_group_data {
 	__u32 group;
 	__u32 block_bitmap;
 	__u32 inode_bitmap;
@@ -216,41 +216,41 @@ struct ext3_new_group_data {
 /*
  * ioctl commands
  */
-#define	EXT3_IOC_GETFLAGS		FS_IOC_GETFLAGS
-#define	EXT3_IOC_SETFLAGS		FS_IOC_SETFLAGS
-#define	EXT3_IOC_GETVERSION		_IOR('f', 3, long)
-#define	EXT3_IOC_SETVERSION		_IOW('f', 4, long)
-#define EXT3_IOC_GROUP_EXTEND		_IOW('f', 7, unsigned long)
-#define EXT3_IOC_GROUP_ADD		_IOW('f', 8,struct ext3_new_group_input)
-#define	EXT3_IOC_GETVERSION_OLD		FS_IOC_GETVERSION
-#define	EXT3_IOC_SETVERSION_OLD		FS_IOC_SETVERSION
+#define	EXT4_IOC_GETFLAGS		FS_IOC_GETFLAGS
+#define	EXT4_IOC_SETFLAGS		FS_IOC_SETFLAGS
+#define	EXT4_IOC_GETVERSION		_IOR('f', 3, long)
+#define	EXT4_IOC_SETVERSION		_IOW('f', 4, long)
+#define EXT4_IOC_GROUP_EXTEND		_IOW('f', 7, unsigned long)
+#define EXT4_IOC_GROUP_ADD		_IOW('f', 8,struct ext4_new_group_input)
+#define	EXT4_IOC_GETVERSION_OLD		FS_IOC_GETVERSION
+#define	EXT4_IOC_SETVERSION_OLD		FS_IOC_SETVERSION
 #ifdef CONFIG_JBD_DEBUG
-#define EXT3_IOC_WAIT_FOR_READONLY	_IOR('f', 99, long)
+#define EXT4_IOC_WAIT_FOR_READONLY	_IOR('f', 99, long)
 #endif
-#define EXT3_IOC_GETRSVSZ		_IOR('f', 5, long)
-#define EXT3_IOC_SETRSVSZ		_IOW('f', 6, long)
+#define EXT4_IOC_GETRSVSZ		_IOR('f', 5, long)
+#define EXT4_IOC_SETRSVSZ		_IOW('f', 6, long)
 
 /*
  * ioctl commands in 32 bit emulation
  */
-#define EXT3_IOC32_GETFLAGS		FS_IOC32_GETFLAGS
-#define EXT3_IOC32_SETFLAGS		FS_IOC32_SETFLAGS
-#define EXT3_IOC32_GETVERSION		_IOR('f', 3, int)
-#define EXT3_IOC32_SETVERSION		_IOW('f', 4, int)
-#define EXT3_IOC32_GETRSVSZ		_IOR('f', 5, int)
-#define EXT3_IOC32_SETRSVSZ		_IOW('f', 6, int)
-#define EXT3_IOC32_GROUP_EXTEND		_IOW('f', 7, unsigned int)
+#define EXT4_IOC32_GETFLAGS		FS_IOC32_GETFLAGS
+#define EXT4_IOC32_SETFLAGS		FS_IOC32_SETFLAGS
+#define EXT4_IOC32_GETVERSION		_IOR('f', 3, int)
+#define EXT4_IOC32_SETVERSION		_IOW('f', 4, int)
+#define EXT4_IOC32_GETRSVSZ		_IOR('f', 5, int)
+#define EXT4_IOC32_SETRSVSZ		_IOW('f', 6, int)
+#define EXT4_IOC32_GROUP_EXTEND		_IOW('f', 7, unsigned int)
 #ifdef CONFIG_JBD_DEBUG
-#define EXT3_IOC32_WAIT_FOR_READONLY	_IOR('f', 99, int)
+#define EXT4_IOC32_WAIT_FOR_READONLY	_IOR('f', 99, int)
 #endif
-#define EXT3_IOC32_GETVERSION_OLD	FS_IOC32_GETVERSION
-#define EXT3_IOC32_SETVERSION_OLD	FS_IOC32_SETVERSION
+#define EXT4_IOC32_GETVERSION_OLD	FS_IOC32_GETVERSION
+#define EXT4_IOC32_SETVERSION_OLD	FS_IOC32_SETVERSION
 
 
 /*
  *  Mount options
  */
-struct ext3_mount_options {
+struct ext4_mount_options {
 	unsigned long s_mount_opt;
 	uid_t s_resuid;
 	gid_t s_resgid;
@@ -264,7 +264,7 @@ struct ext3_mount_options {
 /*
  * Structure of an inode on the disk
  */
-struct ext3_inode {
+struct ext4_inode {
 	__le16	i_mode;		/* File mode */
 	__le16	i_uid;		/* Low 16 bits of Owner Uid */
 	__le32	i_size;		/* Size in bytes */
@@ -287,7 +287,7 @@ struct ext3_inode {
 			__u32  m_i_reserved1;
 		} masix1;
 	} osd1;				/* OS dependent 1 */
-	__le32	i_block[EXT3_N_BLOCKS];/* Pointers to blocks */
+	__le32	i_block[EXT4_N_BLOCKS];/* Pointers to blocks */
 	__le32	i_generation;	/* File version (for NFS) */
 	__le32	i_file_acl;	/* File ACL */
 	__le32	i_dir_acl;	/* Directory ACL */
@@ -353,76 +353,76 @@ struct ext3_inode {
 /*
  * File system states
  */
-#define	EXT3_VALID_FS			0x0001	/* Unmounted cleanly */
-#define	EXT3_ERROR_FS			0x0002	/* Errors detected */
-#define	EXT3_ORPHAN_FS			0x0004	/* Orphans being recovered */
+#define	EXT4_VALID_FS			0x0001	/* Unmounted cleanly */
+#define	EXT4_ERROR_FS			0x0002	/* Errors detected */
+#define	EXT4_ORPHAN_FS			0x0004	/* Orphans being recovered */
 
 /*
  * Mount flags
  */
-#define EXT3_MOUNT_CHECK		0x00001	/* Do mount-time checks */
-#define EXT3_MOUNT_OLDALLOC		0x00002  /* Don't use the new Orlov allocator */
-#define EXT3_MOUNT_GRPID		0x00004	/* Create files with directory's group */
-#define EXT3_MOUNT_DEBUG		0x00008	/* Some debugging messages */
-#define EXT3_MOUNT_ERRORS_CONT		0x00010	/* Continue on errors */
-#define EXT3_MOUNT_ERRORS_RO		0x00020	/* Remount fs ro on errors */
-#define EXT3_MOUNT_ERRORS_PANIC		0x00040	/* Panic on errors */
-#define EXT3_MOUNT_MINIX_DF		0x00080	/* Mimics the Minix statfs */
-#define EXT3_MOUNT_NOLOAD		0x00100	/* Don't use existing journal*/
-#define EXT3_MOUNT_ABORT		0x00200	/* Fatal error detected */
-#define EXT3_MOUNT_DATA_FLAGS		0x00C00	/* Mode for data writes: */
-#define EXT3_MOUNT_JOURNAL_DATA		0x00400	/* Write data to journal */
-#define EXT3_MOUNT_ORDERED_DATA		0x00800	/* Flush data before commit */
-#define EXT3_MOUNT_WRITEBACK_DATA	0x00C00	/* No data ordering */
-#define EXT3_MOUNT_UPDATE_JOURNAL	0x01000	/* Update the journal format */
-#define EXT3_MOUNT_NO_UID32		0x02000  /* Disable 32-bit UIDs */
-#define EXT3_MOUNT_XATTR_USER		0x04000	/* Extended user attributes */
-#define EXT3_MOUNT_POSIX_ACL		0x08000	/* POSIX Access Control Lists */
-#define EXT3_MOUNT_RESERVATION		0x10000	/* Preallocation */
-#define EXT3_MOUNT_BARRIER		0x20000 /* Use block barriers */
-#define EXT3_MOUNT_NOBH			0x40000 /* No bufferheads */
-#define EXT3_MOUNT_QUOTA		0x80000 /* Some quota option set */
-#define EXT3_MOUNT_USRQUOTA		0x100000 /* "old" user quota */
-#define EXT3_MOUNT_GRPQUOTA		0x200000 /* "old" group quota */
-
-/* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
+#define EXT4_MOUNT_CHECK		0x00001	/* Do mount-time checks */
+#define EXT4_MOUNT_OLDALLOC		0x00002  /* Don't use the new Orlov allocator */
+#define EXT4_MOUNT_GRPID		0x00004	/* Create files with directory's group */
+#define EXT4_MOUNT_DEBUG		0x00008	/* Some debugging messages */
+#define EXT4_MOUNT_ERRORS_CONT		0x00010	/* Continue on errors */
+#define EXT4_MOUNT_ERRORS_RO		0x00020	/* Remount fs ro on errors */
+#define EXT4_MOUNT_ERRORS_PANIC		0x00040	/* Panic on errors */
+#define EXT4_MOUNT_MINIX_DF		0x00080	/* Mimics the Minix statfs */
+#define EXT4_MOUNT_NOLOAD		0x00100	/* Don't use existing journal*/
+#define EXT4_MOUNT_ABORT		0x00200	/* Fatal error detected */
+#define EXT4_MOUNT_DATA_FLAGS		0x00C00	/* Mode for data writes: */
+#define EXT4_MOUNT_JOURNAL_DATA		0x00400	/* Write data to journal */
+#define EXT4_MOUNT_ORDERED_DATA		0x00800	/* Flush data before commit */
+#define EXT4_MOUNT_WRITEBACK_DATA	0x00C00	/* No data ordering */
+#define EXT4_MOUNT_UPDATE_JOURNAL	0x01000	/* Update the journal format */
+#define EXT4_MOUNT_NO_UID32		0x02000  /* Disable 32-bit UIDs */
+#define EXT4_MOUNT_XATTR_USER		0x04000	/* Extended user attributes */
+#define EXT4_MOUNT_POSIX_ACL		0x08000	/* POSIX Access Control Lists */
+#define EXT4_MOUNT_RESERVATION		0x10000	/* Preallocation */
+#define EXT4_MOUNT_BARRIER		0x20000 /* Use block barriers */
+#define EXT4_MOUNT_NOBH			0x40000 /* No bufferheads */
+#define EXT4_MOUNT_QUOTA		0x80000 /* Some quota option set */
+#define EXT4_MOUNT_USRQUOTA		0x100000 /* "old" user quota */
+#define EXT4_MOUNT_GRPQUOTA		0x200000 /* "old" group quota */
+
+/* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */
 #ifndef _LINUX_EXT2_FS_H
-#define clear_opt(o, opt)		o &= ~EXT3_MOUNT_##opt
-#define set_opt(o, opt)			o |= EXT3_MOUNT_##opt
-#define test_opt(sb, opt)		(EXT3_SB(sb)->s_mount_opt & \
-					 EXT3_MOUNT_##opt)
+#define clear_opt(o, opt)		o &= ~EXT4_MOUNT_##opt
+#define set_opt(o, opt)			o |= EXT4_MOUNT_##opt
+#define test_opt(sb, opt)		(EXT4_SB(sb)->s_mount_opt & \
+					 EXT4_MOUNT_##opt)
 #else
-#define EXT2_MOUNT_NOLOAD		EXT3_MOUNT_NOLOAD
-#define EXT2_MOUNT_ABORT		EXT3_MOUNT_ABORT
-#define EXT2_MOUNT_DATA_FLAGS		EXT3_MOUNT_DATA_FLAGS
+#define EXT2_MOUNT_NOLOAD		EXT4_MOUNT_NOLOAD
+#define EXT2_MOUNT_ABORT		EXT4_MOUNT_ABORT
+#define EXT2_MOUNT_DATA_FLAGS		EXT4_MOUNT_DATA_FLAGS
 #endif
 
-#define ext3_set_bit			ext2_set_bit
-#define ext3_set_bit_atomic		ext2_set_bit_atomic
-#define ext3_clear_bit			ext2_clear_bit
-#define ext3_clear_bit_atomic		ext2_clear_bit_atomic
-#define ext3_test_bit			ext2_test_bit
-#define ext3_find_first_zero_bit	ext2_find_first_zero_bit
-#define ext3_find_next_zero_bit		ext2_find_next_zero_bit
+#define ext4_set_bit			ext2_set_bit
+#define ext4_set_bit_atomic		ext2_set_bit_atomic
+#define ext4_clear_bit			ext2_clear_bit
+#define ext4_clear_bit_atomic		ext2_clear_bit_atomic
+#define ext4_test_bit			ext2_test_bit
+#define ext4_find_first_zero_bit	ext2_find_first_zero_bit
+#define ext4_find_next_zero_bit		ext2_find_next_zero_bit
 
 /*
  * Maximal mount counts between two filesystem checks
  */
-#define EXT3_DFL_MAX_MNT_COUNT		20	/* Allow 20 mounts */
-#define EXT3_DFL_CHECKINTERVAL		0	/* Don't use interval check */
+#define EXT4_DFL_MAX_MNT_COUNT		20	/* Allow 20 mounts */
+#define EXT4_DFL_CHECKINTERVAL		0	/* Don't use interval check */
 
 /*
  * Behaviour when detecting errors
  */
-#define EXT3_ERRORS_CONTINUE		1	/* Continue execution */
-#define EXT3_ERRORS_RO			2	/* Remount fs read-only */
-#define EXT3_ERRORS_PANIC		3	/* Panic */
-#define EXT3_ERRORS_DEFAULT		EXT3_ERRORS_CONTINUE
+#define EXT4_ERRORS_CONTINUE		1	/* Continue execution */
+#define EXT4_ERRORS_RO			2	/* Remount fs read-only */
+#define EXT4_ERRORS_PANIC		3	/* Panic */
+#define EXT4_ERRORS_DEFAULT		EXT4_ERRORS_CONTINUE
 
 /*
  * Structure of the super block
  */
-struct ext3_super_block {
+struct ext4_super_block {
 /*00*/	__le32	s_inodes_count;		/* Inodes count */
 	__le32	s_blocks_count;		/* Blocks count */
 	__le32	s_r_blocks_count;	/* Reserved blocks count */
@@ -449,7 +449,7 @@ struct ext3_super_block {
 /*50*/	__le16	s_def_resuid;		/* Default uid for reserved blocks */
 	__le16	s_def_resgid;		/* Default gid for reserved blocks */
 	/*
-	 * These fields are for EXT3_DYNAMIC_REV superblocks only.
+	 * These fields are for EXT4_DYNAMIC_REV superblocks only.
 	 *
 	 * Note: the difference between the compatible feature set and
 	 * the incompatible feature set is that if there is a bit set
@@ -473,13 +473,13 @@ struct ext3_super_block {
 /*C8*/	__le32	s_algorithm_usage_bitmap; /* For compression */
 	/*
 	 * Performance hints.  Directory preallocation should only
-	 * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
+	 * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on.
 	 */
 	__u8	s_prealloc_blocks;	/* Nr of blocks to try to preallocate*/
 	__u8	s_prealloc_dir_blocks;	/* Nr to preallocate for dirs */
 	__le16	s_reserved_gdt_blocks;	/* Per group desc for online growth */
 	/*
-	 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
+	 * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set.
 	 */
 /*D0*/	__u8	s_journal_uuid[16];	/* uuid of journal superblock */
 /*E0*/	__le32	s_journal_inum;		/* inode number of journal file */
@@ -495,186 +495,186 @@ struct ext3_super_block {
 };
 
 #ifdef __KERNEL__
-#include <linux/ext3_fs_i.h>
-#include <linux/ext3_fs_sb.h>
-static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb)
+#include <linux/ext4_fs_i.h>
+#include <linux/ext4_fs_sb.h>
+static inline struct ext4_sb_info * EXT4_SB(struct super_block *sb)
 {
 	return sb->s_fs_info;
 }
-static inline struct ext3_inode_info *EXT3_I(struct inode *inode)
+static inline struct ext4_inode_info *EXT4_I(struct inode *inode)
 {
-	return container_of(inode, struct ext3_inode_info, vfs_inode);
+	return container_of(inode, struct ext4_inode_info, vfs_inode);
 }
 
-static inline int ext3_valid_inum(struct super_block *sb, unsigned long ino)
+static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
 {
-	return ino == EXT3_ROOT_INO ||
-		ino == EXT3_JOURNAL_INO ||
-		ino == EXT3_RESIZE_INO ||
-		(ino >= EXT3_FIRST_INO(sb) &&
-		 ino <= le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count));
+	return ino == EXT4_ROOT_INO ||
+		ino == EXT4_JOURNAL_INO ||
+		ino == EXT4_RESIZE_INO ||
+		(ino >= EXT4_FIRST_INO(sb) &&
+		 ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count));
 }
 #else
-/* Assume that user mode programs are passing in an ext3fs superblock, not
+/* Assume that user mode programs are passing in an ext4fs superblock, not
  * a kernel struct super_block.  This will allow us to call the feature-test
  * macros from user land. */
-#define EXT3_SB(sb)	(sb)
+#define EXT4_SB(sb)	(sb)
 #endif
 
-#define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime
+#define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime
 
 /*
  * Codes for operating systems
  */
-#define EXT3_OS_LINUX		0
-#define EXT3_OS_HURD		1
-#define EXT3_OS_MASIX		2
-#define EXT3_OS_FREEBSD		3
-#define EXT3_OS_LITES		4
+#define EXT4_OS_LINUX		0
+#define EXT4_OS_HURD		1
+#define EXT4_OS_MASIX		2
+#define EXT4_OS_FREEBSD		3
+#define EXT4_OS_LITES		4
 
 /*
  * Revision levels
  */
-#define EXT3_GOOD_OLD_REV	0	/* The good old (original) format */
-#define EXT3_DYNAMIC_REV	1	/* V2 format w/ dynamic inode sizes */
+#define EXT4_GOOD_OLD_REV	0	/* The good old (original) format */
+#define EXT4_DYNAMIC_REV	1	/* V2 format w/ dynamic inode sizes */
 
-#define EXT3_CURRENT_REV	EXT3_GOOD_OLD_REV
-#define EXT3_MAX_SUPP_REV	EXT3_DYNAMIC_REV
+#define EXT4_CURRENT_REV	EXT4_GOOD_OLD_REV
+#define EXT4_MAX_SUPP_REV	EXT4_DYNAMIC_REV
 
-#define EXT3_GOOD_OLD_INODE_SIZE 128
+#define EXT4_GOOD_OLD_INODE_SIZE 128
 
 /*
  * Feature set definitions
  */
 
-#define EXT3_HAS_COMPAT_FEATURE(sb,mask)			\
-	( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
-#define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask)			\
-	( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
-#define EXT3_HAS_INCOMPAT_FEATURE(sb,mask)			\
-	( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
-#define EXT3_SET_COMPAT_FEATURE(sb,mask)			\
-	EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
-#define EXT3_SET_RO_COMPAT_FEATURE(sb,mask)			\
-	EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
-#define EXT3_SET_INCOMPAT_FEATURE(sb,mask)			\
-	EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
-#define EXT3_CLEAR_COMPAT_FEATURE(sb,mask)			\
-	EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
-#define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask)			\
-	EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
-#define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask)			\
-	EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
-
-#define EXT3_FEATURE_COMPAT_DIR_PREALLOC	0x0001
-#define EXT3_FEATURE_COMPAT_IMAGIC_INODES	0x0002
-#define EXT3_FEATURE_COMPAT_HAS_JOURNAL		0x0004
-#define EXT3_FEATURE_COMPAT_EXT_ATTR		0x0008
-#define EXT3_FEATURE_COMPAT_RESIZE_INODE	0x0010
-#define EXT3_FEATURE_COMPAT_DIR_INDEX		0x0020
-
-#define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER	0x0001
-#define EXT3_FEATURE_RO_COMPAT_LARGE_FILE	0x0002
-#define EXT3_FEATURE_RO_COMPAT_BTREE_DIR	0x0004
-
-#define EXT3_FEATURE_INCOMPAT_COMPRESSION	0x0001
-#define EXT3_FEATURE_INCOMPAT_FILETYPE		0x0002
-#define EXT3_FEATURE_INCOMPAT_RECOVER		0x0004 /* Needs recovery */
-#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV	0x0008 /* Journal device */
-#define EXT3_FEATURE_INCOMPAT_META_BG		0x0010
-
-#define EXT3_FEATURE_COMPAT_SUPP	EXT2_FEATURE_COMPAT_EXT_ATTR
-#define EXT3_FEATURE_INCOMPAT_SUPP	(EXT3_FEATURE_INCOMPAT_FILETYPE| \
-					 EXT3_FEATURE_INCOMPAT_RECOVER| \
-					 EXT3_FEATURE_INCOMPAT_META_BG)
-#define EXT3_FEATURE_RO_COMPAT_SUPP	(EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
-					 EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
-					 EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
+#define EXT4_HAS_COMPAT_FEATURE(sb,mask)			\
+	( EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
+#define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask)			\
+	( EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
+#define EXT4_HAS_INCOMPAT_FEATURE(sb,mask)			\
+	( EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
+#define EXT4_SET_COMPAT_FEATURE(sb,mask)			\
+	EXT4_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
+#define EXT4_SET_RO_COMPAT_FEATURE(sb,mask)			\
+	EXT4_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
+#define EXT4_SET_INCOMPAT_FEATURE(sb,mask)			\
+	EXT4_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
+#define EXT4_CLEAR_COMPAT_FEATURE(sb,mask)			\
+	EXT4_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
+#define EXT4_CLEAR_RO_COMPAT_FEATURE(sb,mask)			\
+	EXT4_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
+#define EXT4_CLEAR_INCOMPAT_FEATURE(sb,mask)			\
+	EXT4_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
+
+#define EXT4_FEATURE_COMPAT_DIR_PREALLOC	0x0001
+#define EXT4_FEATURE_COMPAT_IMAGIC_INODES	0x0002
+#define EXT4_FEATURE_COMPAT_HAS_JOURNAL		0x0004
+#define EXT4_FEATURE_COMPAT_EXT_ATTR		0x0008
+#define EXT4_FEATURE_COMPAT_RESIZE_INODE	0x0010
+#define EXT4_FEATURE_COMPAT_DIR_INDEX		0x0020
+
+#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER	0x0001
+#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE	0x0002
+#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR	0x0004
+
+#define EXT4_FEATURE_INCOMPAT_COMPRESSION	0x0001
+#define EXT4_FEATURE_INCOMPAT_FILETYPE		0x0002
+#define EXT4_FEATURE_INCOMPAT_RECOVER		0x0004 /* Needs recovery */
+#define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV	0x0008 /* Journal device */
+#define EXT4_FEATURE_INCOMPAT_META_BG		0x0010
+
+#define EXT4_FEATURE_COMPAT_SUPP	EXT2_FEATURE_COMPAT_EXT_ATTR
+#define EXT4_FEATURE_INCOMPAT_SUPP	(EXT4_FEATURE_INCOMPAT_FILETYPE| \
+					 EXT4_FEATURE_INCOMPAT_RECOVER| \
+					 EXT4_FEATURE_INCOMPAT_META_BG)
+#define EXT4_FEATURE_RO_COMPAT_SUPP	(EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
+					 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
+					 EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
 
 /*
  * Default values for user and/or group using reserved blocks
  */
-#define	EXT3_DEF_RESUID		0
-#define	EXT3_DEF_RESGID		0
+#define	EXT4_DEF_RESUID		0
+#define	EXT4_DEF_RESGID		0
 
 /*
  * Default mount options
  */
-#define EXT3_DEFM_DEBUG		0x0001
-#define EXT3_DEFM_BSDGROUPS	0x0002
-#define EXT3_DEFM_XATTR_USER	0x0004
-#define EXT3_DEFM_ACL		0x0008
-#define EXT3_DEFM_UID16		0x0010
-#define EXT3_DEFM_JMODE		0x0060
-#define EXT3_DEFM_JMODE_DATA	0x0020
-#define EXT3_DEFM_JMODE_ORDERED	0x0040
-#define EXT3_DEFM_JMODE_WBACK	0x0060
+#define EXT4_DEFM_DEBUG		0x0001
+#define EXT4_DEFM_BSDGROUPS	0x0002
+#define EXT4_DEFM_XATTR_USER	0x0004
+#define EXT4_DEFM_ACL		0x0008
+#define EXT4_DEFM_UID16		0x0010
+#define EXT4_DEFM_JMODE		0x0060
+#define EXT4_DEFM_JMODE_DATA	0x0020
+#define EXT4_DEFM_JMODE_ORDERED	0x0040
+#define EXT4_DEFM_JMODE_WBACK	0x0060
 
 /*
  * Structure of a directory entry
  */
-#define EXT3_NAME_LEN 255
+#define EXT4_NAME_LEN 255
 
-struct ext3_dir_entry {
+struct ext4_dir_entry {
 	__le32	inode;			/* Inode number */
 	__le16	rec_len;		/* Directory entry length */
 	__le16	name_len;		/* Name length */
-	char	name[EXT3_NAME_LEN];	/* File name */
+	char	name[EXT4_NAME_LEN];	/* File name */
 };
 
 /*
- * The new version of the directory entry.  Since EXT3 structures are
+ * The new version of the directory entry.  Since EXT4 structures are
  * stored in intel byte order, and the name_len field could never be
  * bigger than 255 chars, it's safe to reclaim the extra byte for the
  * file_type field.
  */
-struct ext3_dir_entry_2 {
+struct ext4_dir_entry_2 {
 	__le32	inode;			/* Inode number */
 	__le16	rec_len;		/* Directory entry length */
 	__u8	name_len;		/* Name length */
 	__u8	file_type;
-	char	name[EXT3_NAME_LEN];	/* File name */
+	char	name[EXT4_NAME_LEN];	/* File name */
 };
 
 /*
- * Ext3 directory file types.  Only the low 3 bits are used.  The
+ * Ext4 directory file types.  Only the low 3 bits are used.  The
  * other bits are reserved for now.
  */
-#define EXT3_FT_UNKNOWN		0
-#define EXT3_FT_REG_FILE	1
-#define EXT3_FT_DIR		2
-#define EXT3_FT_CHRDEV		3
-#define EXT3_FT_BLKDEV		4
-#define EXT3_FT_FIFO		5
-#define EXT3_FT_SOCK		6
-#define EXT3_FT_SYMLINK		7
+#define EXT4_FT_UNKNOWN		0
+#define EXT4_FT_REG_FILE	1
+#define EXT4_FT_DIR		2
+#define EXT4_FT_CHRDEV		3
+#define EXT4_FT_BLKDEV		4
+#define EXT4_FT_FIFO		5
+#define EXT4_FT_SOCK		6
+#define EXT4_FT_SYMLINK		7
 
-#define EXT3_FT_MAX		8
+#define EXT4_FT_MAX		8
 
 /*
- * EXT3_DIR_PAD defines the directory entries boundaries
+ * EXT4_DIR_PAD defines the directory entries boundaries
  *
  * NOTE: It must be a multiple of 4
  */
-#define EXT3_DIR_PAD			4
-#define EXT3_DIR_ROUND			(EXT3_DIR_PAD - 1)
-#define EXT3_DIR_REC_LEN(name_len)	(((name_len) + 8 + EXT3_DIR_ROUND) & \
-					 ~EXT3_DIR_ROUND)
+#define EXT4_DIR_PAD			4
+#define EXT4_DIR_ROUND			(EXT4_DIR_PAD - 1)
+#define EXT4_DIR_REC_LEN(name_len)	(((name_len) + 8 + EXT4_DIR_ROUND) & \
+					 ~EXT4_DIR_ROUND)
 /*
  * Hash Tree Directory indexing
  * (c) Daniel Phillips, 2001
  */
 
-#ifdef CONFIG_EXT3_INDEX
-  #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \
-					      EXT3_FEATURE_COMPAT_DIR_INDEX) && \
-		      (EXT3_I(dir)->i_flags & EXT3_INDEX_FL))
-#define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX)
-#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
+#ifdef CONFIG_EXT4_INDEX
+  #define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \
+					      EXT4_FEATURE_COMPAT_DIR_INDEX) && \
+		      (EXT4_I(dir)->i_flags & EXT4_INDEX_FL))
+#define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX)
+#define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
 #else
   #define is_dx(dir) 0
-#define EXT3_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT3_LINK_MAX)
-#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2)
+#define EXT4_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT4_LINK_MAX)
+#define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2)
 #endif
 
 /* Legal values for the dx_root hash_version field: */
@@ -694,10 +694,10 @@ struct dx_hash_info
 	u32		*seed;
 };
 
-#define EXT3_HTREE_EOF	0x7fffffff
+#define EXT4_HTREE_EOF	0x7fffffff
 
 /*
- * Control parameters used by ext3_htree_next_block
+ * Control parameters used by ext4_htree_next_block
  */
 #define HASH_NB_ALWAYS		1
 
@@ -705,16 +705,16 @@ struct dx_hash_info
 /*
  * Describe an inode's exact location on disk and in memory
  */
-struct ext3_iloc
+struct ext4_iloc
 {
 	struct buffer_head *bh;
 	unsigned long offset;
 	unsigned long block_group;
 };
 
-static inline struct ext3_inode *ext3_raw_inode(struct ext3_iloc *iloc)
+static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc)
 {
-	return (struct ext3_inode *) (iloc->bh->b_data + iloc->offset);
+	return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset);
 }
 
 /*
@@ -733,11 +733,11 @@ struct dir_private_info {
 };
 
 /* calculate the first block number of the group */
-static inline ext3_fsblk_t
-ext3_group_first_block_no(struct super_block *sb, unsigned long group_no)
+static inline ext4_fsblk_t
+ext4_group_first_block_no(struct super_block *sb, unsigned long group_no)
 {
-	return group_no * (ext3_fsblk_t)EXT3_BLOCKS_PER_GROUP(sb) +
-		le32_to_cpu(EXT3_SB(sb)->s_es->s_first_data_block);
+	return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) +
+		le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
 }
 
 /*
@@ -751,113 +751,113 @@ ext3_group_first_block_no(struct super_block *sb, unsigned long group_no)
 
 /*
  * Ok, these declarations are also in <linux/kernel.h> but none of the
- * ext3 source programs needs to include it so they are duplicated here.
+ * ext4 source programs needs to include it so they are duplicated here.
  */
 # define NORET_TYPE    /**/
 # define ATTRIB_NORET  __attribute__((noreturn))
 # define NORET_AND     noreturn,
 
 /* balloc.c */
-extern int ext3_bg_has_super(struct super_block *sb, int group);
-extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group);
-extern ext3_fsblk_t ext3_new_block (handle_t *handle, struct inode *inode,
-			ext3_fsblk_t goal, int *errp);
-extern ext3_fsblk_t ext3_new_blocks (handle_t *handle, struct inode *inode,
-			ext3_fsblk_t goal, unsigned long *count, int *errp);
-extern void ext3_free_blocks (handle_t *handle, struct inode *inode,
-			ext3_fsblk_t block, unsigned long count);
-extern void ext3_free_blocks_sb (handle_t *handle, struct super_block *sb,
-				 ext3_fsblk_t block, unsigned long count,
+extern int ext4_bg_has_super(struct super_block *sb, int group);
+extern unsigned long ext4_bg_num_gdb(struct super_block *sb, int group);
+extern ext4_fsblk_t ext4_new_block (handle_t *handle, struct inode *inode,
+			ext4_fsblk_t goal, int *errp);
+extern ext4_fsblk_t ext4_new_blocks (handle_t *handle, struct inode *inode,
+			ext4_fsblk_t goal, unsigned long *count, int *errp);
+extern void ext4_free_blocks (handle_t *handle, struct inode *inode,
+			ext4_fsblk_t block, unsigned long count);
+extern void ext4_free_blocks_sb (handle_t *handle, struct super_block *sb,
+				 ext4_fsblk_t block, unsigned long count,
 				unsigned long *pdquot_freed_blocks);
-extern ext3_fsblk_t ext3_count_free_blocks (struct super_block *);
-extern void ext3_check_blocks_bitmap (struct super_block *);
-extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
+extern ext4_fsblk_t ext4_count_free_blocks (struct super_block *);
+extern void ext4_check_blocks_bitmap (struct super_block *);
+extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
 						    unsigned int block_group,
 						    struct buffer_head ** bh);
-extern int ext3_should_retry_alloc(struct super_block *sb, int *retries);
-extern void ext3_init_block_alloc_info(struct inode *);
-extern void ext3_rsv_window_add(struct super_block *sb, struct ext3_reserve_window_node *rsv);
+extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
+extern void ext4_init_block_alloc_info(struct inode *);
+extern void ext4_rsv_window_add(struct super_block *sb, struct ext4_reserve_window_node *rsv);
 
 /* dir.c */
-extern int ext3_check_dir_entry(const char *, struct inode *,
-				struct ext3_dir_entry_2 *,
+extern int ext4_check_dir_entry(const char *, struct inode *,
+				struct ext4_dir_entry_2 *,
 				struct buffer_head *, unsigned long);
-extern int ext3_htree_store_dirent(struct file *dir_file, __u32 hash,
+extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
 				    __u32 minor_hash,
-				    struct ext3_dir_entry_2 *dirent);
-extern void ext3_htree_free_dir_info(struct dir_private_info *p);
+				    struct ext4_dir_entry_2 *dirent);
+extern void ext4_htree_free_dir_info(struct dir_private_info *p);
 
 /* fsync.c */
-extern int ext3_sync_file (struct file *, struct dentry *, int);
+extern int ext4_sync_file (struct file *, struct dentry *, int);
 
 /* hash.c */
-extern int ext3fs_dirhash(const char *name, int len, struct
+extern int ext4fs_dirhash(const char *name, int len, struct
 			  dx_hash_info *hinfo);
 
 /* ialloc.c */
-extern struct inode * ext3_new_inode (handle_t *, struct inode *, int);
-extern void ext3_free_inode (handle_t *, struct inode *);
-extern struct inode * ext3_orphan_get (struct super_block *, unsigned long);
-extern unsigned long ext3_count_free_inodes (struct super_block *);
-extern unsigned long ext3_count_dirs (struct super_block *);
-extern void ext3_check_inodes_bitmap (struct super_block *);
-extern unsigned long ext3_count_free (struct buffer_head *, unsigned);
+extern struct inode * ext4_new_inode (handle_t *, struct inode *, int);
+extern void ext4_free_inode (handle_t *, struct inode *);
+extern struct inode * ext4_orphan_get (struct super_block *, unsigned long);
+extern unsigned long ext4_count_free_inodes (struct super_block *);
+extern unsigned long ext4_count_dirs (struct super_block *);
+extern void ext4_check_inodes_bitmap (struct super_block *);
+extern unsigned long ext4_count_free (struct buffer_head *, unsigned);
 
 
 /* inode.c */
-int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode,
-		struct buffer_head *bh, ext3_fsblk_t blocknr);
-struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
-struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
-int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
+int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode,
+		struct buffer_head *bh, ext4_fsblk_t blocknr);
+struct buffer_head * ext4_getblk (handle_t *, struct inode *, long, int, int *);
+struct buffer_head * ext4_bread (handle_t *, struct inode *, int, int, int *);
+int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
 	sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result,
 	int create, int extend_disksize);
 
-extern void ext3_read_inode (struct inode *);
-extern int  ext3_write_inode (struct inode *, int);
-extern int  ext3_setattr (struct dentry *, struct iattr *);
-extern void ext3_delete_inode (struct inode *);
-extern int  ext3_sync_inode (handle_t *, struct inode *);
-extern void ext3_discard_reservation (struct inode *);
-extern void ext3_dirty_inode(struct inode *);
-extern int ext3_change_inode_journal_flag(struct inode *, int);
-extern int ext3_get_inode_loc(struct inode *, struct ext3_iloc *);
-extern void ext3_truncate (struct inode *);
-extern void ext3_set_inode_flags(struct inode *);
-extern void ext3_set_aops(struct inode *inode);
+extern void ext4_read_inode (struct inode *);
+extern int  ext4_write_inode (struct inode *, int);
+extern int  ext4_setattr (struct dentry *, struct iattr *);
+extern void ext4_delete_inode (struct inode *);
+extern int  ext4_sync_inode (handle_t *, struct inode *);
+extern void ext4_discard_reservation (struct inode *);
+extern void ext4_dirty_inode(struct inode *);
+extern int ext4_change_inode_journal_flag(struct inode *, int);
+extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *);
+extern void ext4_truncate (struct inode *);
+extern void ext4_set_inode_flags(struct inode *);
+extern void ext4_set_aops(struct inode *inode);
 
 /* ioctl.c */
-extern int ext3_ioctl (struct inode *, struct file *, unsigned int,
+extern int ext4_ioctl (struct inode *, struct file *, unsigned int,
 		       unsigned long);
-extern long ext3_compat_ioctl (struct file *, unsigned int, unsigned long);
+extern long ext4_compat_ioctl (struct file *, unsigned int, unsigned long);
 
 /* namei.c */
-extern int ext3_orphan_add(handle_t *, struct inode *);
-extern int ext3_orphan_del(handle_t *, struct inode *);
-extern int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
+extern int ext4_orphan_add(handle_t *, struct inode *);
+extern int ext4_orphan_del(handle_t *, struct inode *);
+extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
 				__u32 start_minor_hash, __u32 *next_hash);
 
 /* resize.c */
-extern int ext3_group_add(struct super_block *sb,
-				struct ext3_new_group_data *input);
-extern int ext3_group_extend(struct super_block *sb,
-				struct ext3_super_block *es,
-				ext3_fsblk_t n_blocks_count);
+extern int ext4_group_add(struct super_block *sb,
+				struct ext4_new_group_data *input);
+extern int ext4_group_extend(struct super_block *sb,
+				struct ext4_super_block *es,
+				ext4_fsblk_t n_blocks_count);
 
 /* super.c */
-extern void ext3_error (struct super_block *, const char *, const char *, ...)
+extern void ext4_error (struct super_block *, const char *, const char *, ...)
 	__attribute__ ((format (printf, 3, 4)));
-extern void __ext3_std_error (struct super_block *, const char *, int);
-extern void ext3_abort (struct super_block *, const char *, const char *, ...)
+extern void __ext4_std_error (struct super_block *, const char *, int);
+extern void ext4_abort (struct super_block *, const char *, const char *, ...)
 	__attribute__ ((format (printf, 3, 4)));
-extern void ext3_warning (struct super_block *, const char *, const char *, ...)
+extern void ext4_warning (struct super_block *, const char *, const char *, ...)
 	__attribute__ ((format (printf, 3, 4)));
-extern void ext3_update_dynamic_rev (struct super_block *sb);
+extern void ext4_update_dynamic_rev (struct super_block *sb);
 
-#define ext3_std_error(sb, errno)				\
+#define ext4_std_error(sb, errno)				\
 do {								\
 	if ((errno))						\
-		__ext3_std_error((sb), __FUNCTION__, (errno));	\
+		__ext4_std_error((sb), __FUNCTION__, (errno));	\
 } while (0)
 
 /*
@@ -865,21 +865,21 @@ do {								\
  */
 
 /* dir.c */
-extern const struct file_operations ext3_dir_operations;
+extern const struct file_operations ext4_dir_operations;
 
 /* file.c */
-extern struct inode_operations ext3_file_inode_operations;
-extern const struct file_operations ext3_file_operations;
+extern struct inode_operations ext4_file_inode_operations;
+extern const struct file_operations ext4_file_operations;
 
 /* namei.c */
-extern struct inode_operations ext3_dir_inode_operations;
-extern struct inode_operations ext3_special_inode_operations;
+extern struct inode_operations ext4_dir_inode_operations;
+extern struct inode_operations ext4_special_inode_operations;
 
 /* symlink.c */
-extern struct inode_operations ext3_symlink_inode_operations;
-extern struct inode_operations ext3_fast_symlink_inode_operations;
+extern struct inode_operations ext4_symlink_inode_operations;
+extern struct inode_operations ext4_fast_symlink_inode_operations;
 
 
 #endif	/* __KERNEL__ */
 
-#endif	/* _LINUX_EXT3_FS_H */
+#endif	/* _LINUX_EXT4_FS_H */
diff --git a/include/linux/ext4_fs_i.h b/include/linux/ext4_fs_i.h
index 4395e52..18a6ce9 100644
--- a/include/linux/ext4_fs_i.h
+++ b/include/linux/ext4_fs_i.h
@@ -1,5 +1,5 @@
 /*
- *  linux/include/linux/ext3_fs_i.h
+ *  linux/include/linux/ext4_fs_i.h
  *
  * Copyright (C) 1992, 1993, 1994, 1995
  * Remy Card (card@masi.ibp.fr)
@@ -13,8 +13,8 @@
  *  Copyright (C) 1991, 1992  Linus Torvalds
  */
 
-#ifndef _LINUX_EXT3_FS_I
-#define _LINUX_EXT3_FS_I
+#ifndef _LINUX_EXT4_FS_I
+#define _LINUX_EXT4_FS_I
 
 #include <linux/rwsem.h>
 #include <linux/rbtree.h>
@@ -22,43 +22,43 @@
 #include <linux/mutex.h>
 
 /* data type for block offset of block group */
-typedef int ext3_grpblk_t;
+typedef int ext4_grpblk_t;
 
 /* data type for filesystem-wide blocks number */
-typedef unsigned long ext3_fsblk_t;
+typedef unsigned long ext4_fsblk_t;
 
 #define E3FSBLK "%lu"
 
-struct ext3_reserve_window {
-	ext3_fsblk_t	_rsv_start;	/* First byte reserved */
-	ext3_fsblk_t	_rsv_end;	/* Last byte reserved or 0 */
+struct ext4_reserve_window {
+	ext4_fsblk_t	_rsv_start;	/* First byte reserved */
+	ext4_fsblk_t	_rsv_end;	/* Last byte reserved or 0 */
 };
 
-struct ext3_reserve_window_node {
+struct ext4_reserve_window_node {
 	struct rb_node		rsv_node;
 	__u32			rsv_goal_size;
 	__u32			rsv_alloc_hit;
-	struct ext3_reserve_window	rsv_window;
+	struct ext4_reserve_window	rsv_window;
 };
 
-struct ext3_block_alloc_info {
+struct ext4_block_alloc_info {
 	/* information about reservation window */
-	struct ext3_reserve_window_node	rsv_window_node;
+	struct ext4_reserve_window_node	rsv_window_node;
 	/*
-	 * was i_next_alloc_block in ext3_inode_info
+	 * was i_next_alloc_block in ext4_inode_info
 	 * is the logical (file-relative) number of the
 	 * most-recently-allocated block in this file.
 	 * We use this for detecting linearly ascending allocation requests.
 	 */
 	__u32                   last_alloc_logical_block;
 	/*
-	 * Was i_next_alloc_goal in ext3_inode_info
+	 * Was i_next_alloc_goal in ext4_inode_info
 	 * is the *physical* companion to i_next_alloc_block.
 	 * it the the physical block number of the block which was most-recentl
 	 * allocated to this file.  This give us the goal (target) for the next
 	 * allocation when we detect linearly ascending requests.
 	 */
-	ext3_fsblk_t		last_alloc_physical_block;
+	ext4_fsblk_t		last_alloc_physical_block;
 };
 
 #define rsv_start rsv_window._rsv_start
@@ -67,15 +67,15 @@ struct ext3_block_alloc_info {
 /*
  * third extended file system inode data in memory
  */
-struct ext3_inode_info {
+struct ext4_inode_info {
 	__le32	i_data[15];	/* unconverted */
 	__u32	i_flags;
-#ifdef EXT3_FRAGMENTS
+#ifdef EXT4_FRAGMENTS
 	__u32	i_faddr;
 	__u8	i_frag_no;
 	__u8	i_frag_size;
 #endif
-	ext3_fsblk_t	i_file_acl;
+	ext4_fsblk_t	i_file_acl;
 	__u32	i_dir_acl;
 	__u32	i_dtime;
 
@@ -87,13 +87,13 @@ struct ext3_inode_info {
 	 * near to their parent directory's inode.
 	 */
 	__u32	i_block_group;
-	__u32	i_state;		/* Dynamic state flags for ext3 */
+	__u32	i_state;		/* Dynamic state flags for ext4 */
 
 	/* block reservation info */
-	struct ext3_block_alloc_info *i_block_alloc_info;
+	struct ext4_block_alloc_info *i_block_alloc_info;
 
 	__u32	i_dir_start_lookup;
-#ifdef CONFIG_EXT3_FS_XATTR
+#ifdef CONFIG_EXT4DEV_FS_XATTR
 	/*
 	 * Extended attributes can be read independently of the main file
 	 * data. Taking i_mutex even when reading would cause contention
@@ -103,7 +103,7 @@ struct ext3_inode_info {
 	 */
 	struct rw_semaphore xattr_sem;
 #endif
-#ifdef CONFIG_EXT3_FS_POSIX_ACL
+#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
 	struct posix_acl	*i_acl;
 	struct posix_acl	*i_default_acl;
 #endif
@@ -113,7 +113,7 @@ struct ext3_inode_info {
 	/*
 	 * i_disksize keeps track of what the inode size is ON DISK, not
 	 * in memory.  During truncate, i_size is set to the new size by
-	 * the VFS prior to calling ext3_truncate(), but the filesystem won't
+	 * the VFS prior to calling ext4_truncate(), but the filesystem won't
 	 * set i_disksize to 0 until the truncate is actually under way.
 	 *
 	 * The intent is that i_disksize always represents the blocks which
@@ -123,7 +123,7 @@ struct ext3_inode_info {
 	 *
 	 * The only time when i_disksize and i_size may be different is when
 	 * a truncate is in progress.  The only things which change i_disksize
-	 * are ext3_get_block (growth) and ext3_truncate (shrinkth).
+	 * are ext4_get_block (growth) and ext4_truncate (shrinkth).
 	 */
 	loff_t	i_disksize;
 
@@ -131,10 +131,10 @@ struct ext3_inode_info {
 	__u16 i_extra_isize;
 
 	/*
-	 * truncate_mutex is for serialising ext3_truncate() against
-	 * ext3_getblock().  In the 2.4 ext2 design, great chunks of inode's
+	 * truncate_mutex is for serialising ext4_truncate() against
+	 * ext4_getblock().  In the 2.4 ext2 design, great chunks of inode's
 	 * data tree are chopped off during truncate. We can't do that in
-	 * ext3 because whenever we perform intermediate commits during
+	 * ext4 because whenever we perform intermediate commits during
 	 * truncate, the inode and all the metadata blocks *must* be in a
 	 * consistent state which allows truncation of the orphans to restart
 	 * during recovery.  Hence we must fix the get_block-vs-truncate race
@@ -144,4 +144,4 @@ struct ext3_inode_info {
 	struct inode vfs_inode;
 };
 
-#endif	/* _LINUX_EXT3_FS_I */
+#endif	/* _LINUX_EXT4_FS_I */
diff --git a/include/linux/ext4_fs_sb.h b/include/linux/ext4_fs_sb.h
index f61309c..ce4856d 100644
--- a/include/linux/ext4_fs_sb.h
+++ b/include/linux/ext4_fs_sb.h
@@ -1,5 +1,5 @@
 /*
- *  linux/include/linux/ext3_fs_sb.h
+ *  linux/include/linux/ext4_fs_sb.h
  *
  * Copyright (C) 1992, 1993, 1994, 1995
  * Remy Card (card@masi.ibp.fr)
@@ -13,8 +13,8 @@
  *  Copyright (C) 1991, 1992  Linus Torvalds
  */
 
-#ifndef _LINUX_EXT3_FS_SB
-#define _LINUX_EXT3_FS_SB
+#ifndef _LINUX_EXT4_FS_SB
+#define _LINUX_EXT4_FS_SB
 
 #ifdef __KERNEL__
 #include <linux/timer.h>
@@ -27,7 +27,7 @@
 /*
  * third extended-fs super-block data in memory
  */
-struct ext3_sb_info {
+struct ext4_sb_info {
 	unsigned long s_frag_size;	/* Size of a fragment in bytes */
 	unsigned long s_frags_per_block;/* Number of fragments per block */
 	unsigned long s_inodes_per_block;/* Number of inodes per block */
@@ -39,7 +39,7 @@ struct ext3_sb_info {
 	unsigned long s_desc_per_block;	/* Number of group descriptors per block */
 	unsigned long s_groups_count;	/* Number of groups in the fs */
 	struct buffer_head * s_sbh;	/* Buffer containing the super block */
-	struct ext3_super_block * s_es;	/* Pointer to the super block in the buffer */
+	struct ext4_super_block * s_es;	/* Pointer to the super block in the buffer */
 	struct buffer_head ** s_group_desc;
 	unsigned long  s_mount_opt;
 	uid_t s_resuid;
@@ -62,7 +62,7 @@ struct ext3_sb_info {
 	/* root of the per fs reservation window tree */
 	spinlock_t s_rsv_window_lock;
 	struct rb_root s_rsv_window_root;
-	struct ext3_reserve_window_node s_rsv_window_head;
+	struct ext4_reserve_window_node s_rsv_window_head;
 
 	/* Journaling */
 	struct inode * s_journal_inode;
@@ -80,4 +80,4 @@ struct ext3_sb_info {
 #endif
 };
 
-#endif	/* _LINUX_EXT3_FS_SB */
+#endif	/* _LINUX_EXT4_FS_SB */
diff --git a/include/linux/ext4_jbd.h b/include/linux/ext4_jbd.h
index ce0e610..3dbf6c7 100644
--- a/include/linux/ext4_jbd.h
+++ b/include/linux/ext4_jbd.h
@@ -1,5 +1,5 @@
 /*
- * linux/include/linux/ext3_jbd.h
+ * linux/include/linux/ext4_jbd.h
  *
  * Written by Stephen C. Tweedie <sct@redhat.com>, 1999
  *
@@ -9,17 +9,17 @@
  * the terms of the GNU General Public License, version 2, or at your
  * option, any later version, incorporated herein by reference.
  *
- * Ext3-specific journaling extensions.
+ * Ext4-specific journaling extensions.
  */
 
-#ifndef _LINUX_EXT3_JBD_H
-#define _LINUX_EXT3_JBD_H
+#ifndef _LINUX_EXT4_JBD_H
+#define _LINUX_EXT4_JBD_H
 
 #include <linux/fs.h>
 #include <linux/jbd.h>
-#include <linux/ext3_fs.h>
+#include <linux/ext4_fs.h>
 
-#define EXT3_JOURNAL(inode)	(EXT3_SB((inode)->i_sb)->s_journal)
+#define EXT4_JOURNAL(inode)	(EXT4_SB((inode)->i_sb)->s_journal)
 
 /* Define the number of blocks we need to account to a transaction to
  * modify one block of data.
@@ -28,13 +28,13 @@
  * indirection blocks, the group and superblock summaries, and the data
  * block to complete the transaction.  */
 
-#define EXT3_SINGLEDATA_TRANS_BLOCKS	8U
+#define EXT4_SINGLEDATA_TRANS_BLOCKS	8U
 
 /* Extended attribute operations touch at most two data buffers,
  * two bitmap buffers, and two group summaries, in addition to the inode
  * and the superblock, which are already accounted for. */
 
-#define EXT3_XATTR_TRANS_BLOCKS		6U
+#define EXT4_XATTR_TRANS_BLOCKS		6U
 
 /* Define the minimum size for a transaction which modifies data.  This
  * needs to take into account the fact that we may end up modifying two
@@ -42,15 +42,15 @@
  * superblock only gets updated once, of course, so don't bother
  * counting that again for the quota updates. */
 
-#define EXT3_DATA_TRANS_BLOCKS(sb)	(EXT3_SINGLEDATA_TRANS_BLOCKS + \
-					 EXT3_XATTR_TRANS_BLOCKS - 2 + \
-					 2*EXT3_QUOTA_TRANS_BLOCKS(sb))
+#define EXT4_DATA_TRANS_BLOCKS(sb)	(EXT4_SINGLEDATA_TRANS_BLOCKS + \
+					 EXT4_XATTR_TRANS_BLOCKS - 2 + \
+					 2*EXT4_QUOTA_TRANS_BLOCKS(sb))
 
 /* Delete operations potentially hit one directory's namespace plus an
  * entire inode, plus arbitrary amounts of bitmap/indirection data.  Be
  * generous.  We can grow the delete transaction later if necessary. */
 
-#define EXT3_DELETE_TRANS_BLOCKS(sb)	(2 * EXT3_DATA_TRANS_BLOCKS(sb) + 64)
+#define EXT4_DELETE_TRANS_BLOCKS(sb)	(2 * EXT4_DATA_TRANS_BLOCKS(sb) + 64)
 
 /* Define an arbitrary limit for the amount of data we will anticipate
  * writing to any given transaction.  For unbounded transactions such as
@@ -58,7 +58,7 @@
  * start off at the maximum transaction size and grow the transaction
  * optimistically as we go. */
 
-#define EXT3_MAX_TRANS_DATA		64U
+#define EXT4_MAX_TRANS_DATA		64U
 
 /* We break up a large truncate or write transaction once the handle's
  * buffer credits gets this low, we need either to extend the
@@ -67,202 +67,202 @@
  * one block, plus two quota updates.  Quota allocations are not
  * needed. */
 
-#define EXT3_RESERVE_TRANS_BLOCKS	12U
+#define EXT4_RESERVE_TRANS_BLOCKS	12U
 
-#define EXT3_INDEX_EXTRA_TRANS_BLOCKS	8
+#define EXT4_INDEX_EXTRA_TRANS_BLOCKS	8
 
 #ifdef CONFIG_QUOTA
 /* Amount of blocks needed for quota update - we know that the structure was
  * allocated so we need to update only inode+data */
-#define EXT3_QUOTA_TRANS_BLOCKS(sb) (test_opt(sb, QUOTA) ? 2 : 0)
+#define EXT4_QUOTA_TRANS_BLOCKS(sb) (test_opt(sb, QUOTA) ? 2 : 0)
 /* Amount of blocks needed for quota insert/delete - we do some block writes
  * but inode, sb and group updates are done only once */
-#define EXT3_QUOTA_INIT_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_INIT_ALLOC*\
-		(EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_INIT_REWRITE) : 0)
-#define EXT3_QUOTA_DEL_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_DEL_ALLOC*\
-		(EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_DEL_REWRITE) : 0)
+#define EXT4_QUOTA_INIT_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_INIT_ALLOC*\
+		(EXT4_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_INIT_REWRITE) : 0)
+#define EXT4_QUOTA_DEL_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_DEL_ALLOC*\
+		(EXT4_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_DEL_REWRITE) : 0)
 #else
-#define EXT3_QUOTA_TRANS_BLOCKS(sb) 0
-#define EXT3_QUOTA_INIT_BLOCKS(sb) 0
-#define EXT3_QUOTA_DEL_BLOCKS(sb) 0
+#define EXT4_QUOTA_TRANS_BLOCKS(sb) 0
+#define EXT4_QUOTA_INIT_BLOCKS(sb) 0
+#define EXT4_QUOTA_DEL_BLOCKS(sb) 0
 #endif
 
 int
-ext3_mark_iloc_dirty(handle_t *handle,
+ext4_mark_iloc_dirty(handle_t *handle,
 		     struct inode *inode,
-		     struct ext3_iloc *iloc);
+		     struct ext4_iloc *iloc);
 
 /*
  * On success, We end up with an outstanding reference count against
  * iloc->bh.  This _must_ be cleaned up later.
  */
 
-int ext3_reserve_inode_write(handle_t *handle, struct inode *inode,
-			struct ext3_iloc *iloc);
+int ext4_reserve_inode_write(handle_t *handle, struct inode *inode,
+			struct ext4_iloc *iloc);
 
-int ext3_mark_inode_dirty(handle_t *handle, struct inode *inode);
+int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode);
 
 /*
- * Wrapper functions with which ext3 calls into JBD.  The intent here is
- * to allow these to be turned into appropriate stubs so ext3 can control
- * ext2 filesystems, so ext2+ext3 systems only nee one fs.  This work hasn't
+ * Wrapper functions with which ext4 calls into JBD.  The intent here is
+ * to allow these to be turned into appropriate stubs so ext4 can control
+ * ext2 filesystems, so ext2+ext4 systems only nee one fs.  This work hasn't
  * been done yet.
  */
 
-void ext3_journal_abort_handle(const char *caller, const char *err_fn,
+void ext4_journal_abort_handle(const char *caller, const char *err_fn,
 		struct buffer_head *bh, handle_t *handle, int err);
 
 static inline int
-__ext3_journal_get_undo_access(const char *where, handle_t *handle,
+__ext4_journal_get_undo_access(const char *where, handle_t *handle,
 				struct buffer_head *bh)
 {
 	int err = journal_get_undo_access(handle, bh);
 	if (err)
-		ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
+		ext4_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
 	return err;
 }
 
 static inline int
-__ext3_journal_get_write_access(const char *where, handle_t *handle,
+__ext4_journal_get_write_access(const char *where, handle_t *handle,
 				struct buffer_head *bh)
 {
 	int err = journal_get_write_access(handle, bh);
 	if (err)
-		ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
+		ext4_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
 	return err;
 }
 
 static inline void
-ext3_journal_release_buffer(handle_t *handle, struct buffer_head *bh)
+ext4_journal_release_buffer(handle_t *handle, struct buffer_head *bh)
 {
 	journal_release_buffer(handle, bh);
 }
 
 static inline int
-__ext3_journal_forget(const char *where, handle_t *handle, struct buffer_head *bh)
+__ext4_journal_forget(const char *where, handle_t *handle, struct buffer_head *bh)
 {
 	int err = journal_forget(handle, bh);
 	if (err)
-		ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
+		ext4_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
 	return err;
 }
 
 static inline int
-__ext3_journal_revoke(const char *where, handle_t *handle,
+__ext4_journal_revoke(const char *where, handle_t *handle,
 		      unsigned long blocknr, struct buffer_head *bh)
 {
 	int err = journal_revoke(handle, blocknr, bh);
 	if (err)
-		ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
+		ext4_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
 	return err;
 }
 
 static inline int
-__ext3_journal_get_create_access(const char *where,
+__ext4_journal_get_create_access(const char *where,
 				 handle_t *handle, struct buffer_head *bh)
 {
 	int err = journal_get_create_access(handle, bh);
 	if (err)
-		ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
+		ext4_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
 	return err;
 }
 
 static inline int
-__ext3_journal_dirty_metadata(const char *where,
+__ext4_journal_dirty_metadata(const char *where,
 			      handle_t *handle, struct buffer_head *bh)
 {
 	int err = journal_dirty_metadata(handle, bh);
 	if (err)
-		ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
+		ext4_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
 	return err;
 }
 
 
-#define ext3_journal_get_undo_access(handle, bh) \
-	__ext3_journal_get_undo_access(__FUNCTION__, (handle), (bh))
-#define ext3_journal_get_write_access(handle, bh) \
-	__ext3_journal_get_write_access(__FUNCTION__, (handle), (bh))
-#define ext3_journal_revoke(handle, blocknr, bh) \
-	__ext3_journal_revoke(__FUNCTION__, (handle), (blocknr), (bh))
-#define ext3_journal_get_create_access(handle, bh) \
-	__ext3_journal_get_create_access(__FUNCTION__, (handle), (bh))
-#define ext3_journal_dirty_metadata(handle, bh) \
-	__ext3_journal_dirty_metadata(__FUNCTION__, (handle), (bh))
-#define ext3_journal_forget(handle, bh) \
-	__ext3_journal_forget(__FUNCTION__, (handle), (bh))
+#define ext4_journal_get_undo_access(handle, bh) \
+	__ext4_journal_get_undo_access(__FUNCTION__, (handle), (bh))
+#define ext4_journal_get_write_access(handle, bh) \
+	__ext4_journal_get_write_access(__FUNCTION__, (handle), (bh))
+#define ext4_journal_revoke(handle, blocknr, bh) \
+	__ext4_journal_revoke(__FUNCTION__, (handle), (blocknr), (bh))
+#define ext4_journal_get_create_access(handle, bh) \
+	__ext4_journal_get_create_access(__FUNCTION__, (handle), (bh))
+#define ext4_journal_dirty_metadata(handle, bh) \
+	__ext4_journal_dirty_metadata(__FUNCTION__, (handle), (bh))
+#define ext4_journal_forget(handle, bh) \
+	__ext4_journal_forget(__FUNCTION__, (handle), (bh))
 
-int ext3_journal_dirty_data(handle_t *handle, struct buffer_head *bh);
+int ext4_journal_dirty_data(handle_t *handle, struct buffer_head *bh);
 
-handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks);
-int __ext3_journal_stop(const char *where, handle_t *handle);
+handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks);
+int __ext4_journal_stop(const char *where, handle_t *handle);
 
-static inline handle_t *ext3_journal_start(struct inode *inode, int nblocks)
+static inline handle_t *ext4_journal_start(struct inode *inode, int nblocks)
 {
-	return ext3_journal_start_sb(inode->i_sb, nblocks);
+	return ext4_journal_start_sb(inode->i_sb, nblocks);
 }
 
-#define ext3_journal_stop(handle) \
-	__ext3_journal_stop(__FUNCTION__, (handle))
+#define ext4_journal_stop(handle) \
+	__ext4_journal_stop(__FUNCTION__, (handle))
 
-static inline handle_t *ext3_journal_current_handle(void)
+static inline handle_t *ext4_journal_current_handle(void)
 {
 	return journal_current_handle();
 }
 
-static inline int ext3_journal_extend(handle_t *handle, int nblocks)
+static inline int ext4_journal_extend(handle_t *handle, int nblocks)
 {
 	return journal_extend(handle, nblocks);
 }
 
-static inline int ext3_journal_restart(handle_t *handle, int nblocks)
+static inline int ext4_journal_restart(handle_t *handle, int nblocks)
 {
 	return journal_restart(handle, nblocks);
 }
 
-static inline int ext3_journal_blocks_per_page(struct inode *inode)
+static inline int ext4_journal_blocks_per_page(struct inode *inode)
 {
 	return journal_blocks_per_page(inode);
 }
 
-static inline int ext3_journal_force_commit(journal_t *journal)
+static inline int ext4_journal_force_commit(journal_t *journal)
 {
 	return journal_force_commit(journal);
 }
 
 /* super.c */
-int ext3_force_commit(struct super_block *sb);
+int ext4_force_commit(struct super_block *sb);
 
-static inline int ext3_should_journal_data(struct inode *inode)
+static inline int ext4_should_journal_data(struct inode *inode)
 {
 	if (!S_ISREG(inode->i_mode))
 		return 1;
-	if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA)
+	if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)
 		return 1;
-	if (EXT3_I(inode)->i_flags & EXT3_JOURNAL_DATA_FL)
+	if (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL)
 		return 1;
 	return 0;
 }
 
-static inline int ext3_should_order_data(struct inode *inode)
+static inline int ext4_should_order_data(struct inode *inode)
 {
 	if (!S_ISREG(inode->i_mode))
 		return 0;
-	if (EXT3_I(inode)->i_flags & EXT3_JOURNAL_DATA_FL)
+	if (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL)
 		return 0;
-	if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA)
+	if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA)
 		return 1;
 	return 0;
 }
 
-static inline int ext3_should_writeback_data(struct inode *inode)
+static inline int ext4_should_writeback_data(struct inode *inode)
 {
 	if (!S_ISREG(inode->i_mode))
 		return 0;
-	if (EXT3_I(inode)->i_flags & EXT3_JOURNAL_DATA_FL)
+	if (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL)
 		return 0;
-	if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)
+	if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)
 		return 1;
 	return 0;
 }
 
-#endif	/* _LINUX_EXT3_JBD_H */
+#endif	/* _LINUX_EXT4_JBD_H */