manual update from upstream:

Applied Al's change 06a544971fad0992fe8b92c5647538d573089dd4
to new location of swiotlb.c

Signed-off-by: Tony Luck <tony.luck@intel.com>

10 files changed, 67 insertions, 24 deletions

diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c
index 0213db4..7992d21 100644
--- a/fs/ext3/balloc.c
+++ b/fs/ext3/balloc.c
@@ -20,6 +20,8 @@
 #include <linux/quotaops.h>
 #include <linux/buffer_head.h>
 
+#include "bitmap.h"
+
 /*
  * balloc.c contains the blocks allocation and deallocation routines
  */
@@ -1010,7 +1012,7 @@ retry:
  * allocation within the reservation window.
  *
  * This will avoid keeping on searching the reservation list again and
- * again when someboday is looking for a free block (without
+ * again when somebody is looking for a free block (without
  * reservation), and there are lots of free blocks, but they are all
  * being reserved.
  *
@@ -1416,12 +1418,12 @@ unsigned long ext3_count_free_blocks(struct super_block *sb)
 	unsigned long bitmap_count, x;
 	struct buffer_head *bitmap_bh = NULL;
 
-	lock_super(sb);
 	es = EXT3_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);
 		if (!gdp)
@@ -1440,7 +1442,6 @@ unsigned long ext3_count_free_blocks(struct super_block *sb)
 	brelse(bitmap_bh);
 	printk("ext3_count_free_blocks: stored = %u, computed = %lu, %lu\n",
 	       le32_to_cpu(es->s_free_blocks_count), desc_count, bitmap_count);
-	unlock_super(sb);
 	return bitmap_count;
 #else
 	desc_count = 0;
diff --git a/fs/ext3/bitmap.c b/fs/ext3/bitmap.c
index 6c419b9..5b4ba3e 100644
--- a/fs/ext3/bitmap.c
+++ b/fs/ext3/bitmap.c
@@ -8,7 +8,7 @@
  */
 
 #include <linux/buffer_head.h>
-
+#include "bitmap.h"
 
 static int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
 
diff --git a/fs/ext3/bitmap.h b/fs/ext3/bitmap.h
new file mode 100644
index 0000000..6ee503a
--- /dev/null
+++ b/fs/ext3/bitmap.h
@@ -0,0 +1,8 @@
+/*  linux/fs/ext3/bitmap.c
+ *
+ * Copyright (C) 2005 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+*/
+
+extern unsigned long ext3_count_free (struct buffer_head *, unsigned int );
diff --git a/fs/ext3/ialloc.c b/fs/ext3/ialloc.c
index 6549945..df3f517 100644
--- a/fs/ext3/ialloc.c
+++ b/fs/ext3/ialloc.c
@@ -26,6 +26,7 @@
 
 #include <asm/byteorder.h>
 
+#include "bitmap.h"
 #include "xattr.h"
 #include "acl.h"
 
@@ -704,7 +705,6 @@ unsigned long ext3_count_free_inodes (struct super_block * sb)
 	unsigned long bitmap_count, x;
 	struct buffer_head *bitmap_bh = NULL;
 
-	lock_super (sb);
 	es = EXT3_SB(sb)->s_es;
 	desc_count = 0;
 	bitmap_count = 0;
@@ -727,7 +727,6 @@ unsigned long ext3_count_free_inodes (struct super_block * sb)
 	brelse(bitmap_bh);
 	printk("ext3_count_free_inodes: stored = %u, computed = %lu, %lu\n",
 		le32_to_cpu(es->s_free_inodes_count), desc_count, bitmap_count);
-	unlock_super(sb);
 	return desc_count;
 #else
 	desc_count = 0;
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index b5177c9..5d9b00e 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -491,7 +491,7 @@ static unsigned long ext3_find_goal(struct inode *inode, long block,
  *	the same format as ext3_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(), excpet that in one
+ *	picture as after the successful ext3_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.
@@ -523,7 +523,6 @@ static int ext3_alloc_branch(handle_t *handle, struct inode *inode,
 			if (!nr)
 				break;
 			branch[n].key = cpu_to_le32(nr);
-			keys = n+1;
 
 			/*
 			 * Get buffer_head for parent block, zero it out
@@ -531,6 +530,9 @@ static int ext3_alloc_branch(handle_t *handle, struct inode *inode,
 			 * parent to disk.  
 			 */
 			bh = sb_getblk(inode->i_sb, parent);
+			if (!bh)
+				break;
+			keys = n+1;
 			branch[n].bh = bh;
 			lock_buffer(bh);
 			BUFFER_TRACE(bh, "call get_create_access");
@@ -864,6 +866,10 @@ struct buffer_head *ext3_getblk(handle_t *handle, struct inode * inode,
 	if (!*errp && buffer_mapped(&dummy)) {
 		struct buffer_head *bh;
 		bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
+		if (!bh) {
+			*errp = -EIO;
+			goto err;
+		}
 		if (buffer_new(&dummy)) {
 			J_ASSERT(create != 0);
 			J_ASSERT(handle != 0);
@@ -896,6 +902,7 @@ struct buffer_head *ext3_getblk(handle_t *handle, struct inode * inode,
 		}
 		return bh;
 	}
+err:
 	return NULL;
 }
 
@@ -1434,7 +1441,7 @@ static int ext3_invalidatepage(struct page *page, unsigned long offset)
 	return journal_invalidatepage(journal, page, offset);
 }
 
-static int ext3_releasepage(struct page *page, int wait)
+static int ext3_releasepage(struct page *page, gfp_t wait)
 {
 	journal_t *journal = EXT3_JOURNAL(page->mapping->host);
 
diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index 50378d8..b3c690a 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -36,6 +36,8 @@
 #include <linux/quotaops.h>
 #include <linux/buffer_head.h>
 #include <linux/smp_lock.h>
+
+#include "namei.h"
 #include "xattr.h"
 #include "acl.h"
 
diff --git a/fs/ext3/namei.h b/fs/ext3/namei.h
new file mode 100644
index 0000000..f2ce2b0
--- /dev/null
+++ b/fs/ext3/namei.h
@@ -0,0 +1,8 @@
+/*  linux/fs/ext3/namei.h
+ *
+ * Copyright (C) 2005 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+*/
+
+extern struct dentry *ext3_get_parent(struct dentry *child);
diff --git a/fs/ext3/resize.c b/fs/ext3/resize.c
index 57f7910..1be78b4b 100644
--- a/fs/ext3/resize.c
+++ b/fs/ext3/resize.c
@@ -118,6 +118,8 @@ static struct buffer_head *bclean(handle_t *handle, struct super_block *sb,
 	int err;
 
 	bh = sb_getblk(sb, blk);
+	if (!bh)
+		return ERR_PTR(-EIO);
 	if ((err = ext3_journal_get_write_access(handle, bh))) {
 		brelse(bh);
 		bh = ERR_PTR(err);
@@ -202,6 +204,10 @@ static int setup_new_group_blocks(struct super_block *sb,
 		ext3_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))) {
 			brelse(gdb);
 			goto exit_bh;
@@ -643,6 +649,10 @@ static void update_backups(struct super_block *sb,
 			break;
 
 		bh = sb_getblk(sb, group * bpg + blk_off);
+		if (!bh) {
+			err = -EIO;
+			break;
+		}
 		ext3_debug("update metadata backup %#04lx\n",
 			  (unsigned long)bh->b_blocknr);
 		if ((err = ext3_journal_get_write_access(handle, bh)))
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 9e24ceb..f594989 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -36,9 +36,12 @@
 #include <linux/namei.h>
 #include <linux/quotaops.h>
 #include <linux/seq_file.h>
+
 #include <asm/uaccess.h>
+
 #include "xattr.h"
 #include "acl.h"
+#include "namei.h"
 
 static int ext3_load_journal(struct super_block *, struct ext3_super_block *);
 static int ext3_create_journal(struct super_block *, struct ext3_super_block *,
@@ -510,19 +513,11 @@ static void ext3_clear_inode(struct inode *inode)
 	kfree(rsv);
 }
 
-static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs)
+static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb)
 {
-	struct super_block *sb = vfs->mnt_sb;
+#if defined(CONFIG_QUOTA)
 	struct ext3_sb_info *sbi = EXT3_SB(sb);
 
-	if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA)
-		seq_puts(seq, ",data=journal");
-	else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA)
-		seq_puts(seq, ",data=ordered");
-	else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)
-		seq_puts(seq, ",data=writeback");
-
-#if defined(CONFIG_QUOTA)
 	if (sbi->s_jquota_fmt)
 		seq_printf(seq, ",jqfmt=%s",
 		(sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0");
@@ -539,6 +534,20 @@ static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs)
 	if (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)
 		seq_puts(seq, ",grpquota");
 #endif
+}
+
+static int ext3_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)
+		seq_puts(seq, ",data=journal");
+	else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA)
+		seq_puts(seq, ",data=ordered");
+	else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)
+		seq_puts(seq, ",data=writeback");
+
+	ext3_show_quota_options(seq, sb);
 
 	return 0;
 }
@@ -609,7 +618,6 @@ static struct super_operations ext3_sops = {
 #endif
 };
 
-struct dentry *ext3_get_parent(struct dentry *child);
 static struct export_operations ext3_export_ops = {
 	.get_parent = ext3_get_parent,
 };
diff --git a/fs/ext3/xattr.c b/fs/ext3/xattr.c
index 269c7b9..430de9f 100644
--- a/fs/ext3/xattr.c
+++ b/fs/ext3/xattr.c
@@ -210,7 +210,7 @@ ext3_xattr_find_entry(struct ext3_xattr_entry **pentry, int name_index,
 	return cmp ? -ENODATA : 0;
 }
 
-int
+static int
 ext3_xattr_block_get(struct inode *inode, int name_index, const char *name,
 		     void *buffer, size_t buffer_size)
 {
@@ -354,7 +354,7 @@ ext3_xattr_list_entries(struct inode *inode, struct ext3_xattr_entry *entry,
 	return buffer_size - rest;
 }
 
-int
+static int
 ext3_xattr_block_list(struct inode *inode, char *buffer, size_t buffer_size)
 {
 	struct buffer_head *bh = NULL;
@@ -626,7 +626,7 @@ struct ext3_xattr_block_find {
 	struct buffer_head *bh;
 };
 
-int
+static int
 ext3_xattr_block_find(struct inode *inode, struct ext3_xattr_info *i,
 		      struct ext3_xattr_block_find *bs)
 {
@@ -859,7 +859,7 @@ struct ext3_xattr_ibody_find {
 	struct ext3_iloc iloc;
 };
 
-int
+static int
 ext3_xattr_ibody_find(struct inode *inode, struct ext3_xattr_info *i,
 		      struct ext3_xattr_ibody_find *is)
 {