[PATCH] mark struct inode_operations const 3

Many struct inode_operations in the kernel can be "const".  Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data.  In addition it'll catch accidental writes at compile time to
these shared resources.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 14 insertions, 14 deletions

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 7b1ded63..4f5745a 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -93,7 +93,7 @@ struct pid_entry {
 	int len;
 	char *name;
 	mode_t mode;
-	struct inode_operations *iop;
+	const struct inode_operations *iop;
 	const struct file_operations *fop;
 	union proc_op op;
 };
@@ -352,7 +352,7 @@ static int proc_setattr(struct dentry *dentry, struct iattr *attr)
 	return error;
 }
 
-static struct inode_operations proc_def_inode_operations = {
+static const struct inode_operations proc_def_inode_operations = {
 	.setattr	= proc_setattr,
 };
 
@@ -980,7 +980,7 @@ out:
 	return error;
 }
 
-static struct inode_operations proc_pid_link_inode_operations = {
+static const struct inode_operations proc_pid_link_inode_operations = {
 	.readlink	= proc_pid_readlink,
 	.follow_link	= proc_pid_follow_link,
 	.setattr	= proc_setattr,
@@ -1416,7 +1416,7 @@ static const struct file_operations proc_fd_operations = {
 /*
  * proc directories can do almost nothing..
  */
-static struct inode_operations proc_fd_inode_operations = {
+static const struct inode_operations proc_fd_inode_operations = {
 	.lookup		= proc_lookupfd,
 	.setattr	= proc_setattr,
 };
@@ -1656,7 +1656,7 @@ static struct dentry *proc_attr_dir_lookup(struct inode *dir,
 				  attr_dir_stuff, ARRAY_SIZE(attr_dir_stuff));
 }
 
-static struct inode_operations proc_attr_dir_inode_operations = {
+static const struct inode_operations proc_attr_dir_inode_operations = {
 	.lookup		= proc_attr_dir_lookup,
 	.getattr	= pid_getattr,
 	.setattr	= proc_setattr,
@@ -1682,7 +1682,7 @@ static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd)
 	return ERR_PTR(vfs_follow_link(nd,tmp));
 }
 
-static struct inode_operations proc_self_inode_operations = {
+static const struct inode_operations proc_self_inode_operations = {
 	.readlink	= proc_self_readlink,
 	.follow_link	= proc_self_follow_link,
 };
@@ -1835,7 +1835,7 @@ static int proc_pid_io_accounting(struct task_struct *task, char *buffer)
  * Thread groups
  */
 static const struct file_operations proc_task_operations;
-static struct inode_operations proc_task_inode_operations;
+static const struct inode_operations proc_task_inode_operations;
 
 static struct pid_entry tgid_base_stuff[] = {
 	DIR("task",       S_IRUGO|S_IXUGO, task),
@@ -1904,7 +1904,7 @@ static struct dentry *proc_tgid_base_lookup(struct inode *dir, struct dentry *de
 				  tgid_base_stuff, ARRAY_SIZE(tgid_base_stuff));
 }
 
-static struct inode_operations proc_tgid_base_inode_operations = {
+static const struct inode_operations proc_tgid_base_inode_operations = {
 	.lookup		= proc_tgid_base_lookup,
 	.getattr	= pid_getattr,
 	.setattr	= proc_setattr,
@@ -2182,7 +2182,7 @@ static const struct file_operations proc_tid_base_operations = {
 	.readdir	= proc_tid_base_readdir,
 };
 
-static struct inode_operations proc_tid_base_inode_operations = {
+static const struct inode_operations proc_tid_base_inode_operations = {
 	.lookup		= proc_tid_base_lookup,
 	.getattr	= pid_getattr,
 	.setattr	= proc_setattr,
@@ -2408,7 +2408,7 @@ static int proc_task_getattr(struct vfsmount *mnt, struct dentry *dentry, struct
 	return 0;
 }
 
-static struct inode_operations proc_task_inode_operations = {
+static const struct inode_operations proc_task_inode_operations = {
 	.lookup		= proc_task_lookup,
 	.getattr	= proc_task_getattr,
 	.setattr	= proc_setattr,
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index aa52f10..0cdc00d 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -265,7 +265,7 @@ static int proc_getattr(struct vfsmount *mnt, struct dentry *dentry,
 	return 0;
 }
 
-static struct inode_operations proc_file_inode_operations = {
+static const struct inode_operations proc_file_inode_operations = {
 	.setattr	= proc_notify_change,
 };
 
@@ -357,7 +357,7 @@ static void *proc_follow_link(struct dentry *dentry, struct nameidata *nd)
 	return NULL;
 }
 
-static struct inode_operations proc_link_inode_operations = {
+static const struct inode_operations proc_link_inode_operations = {
 	.readlink	= generic_readlink,
 	.follow_link	= proc_follow_link,
 };
@@ -505,7 +505,7 @@ static const struct file_operations proc_dir_operations = {
 /*
  * proc directories can do almost nothing..
  */
-static struct inode_operations proc_dir_inode_operations = {
+static const struct inode_operations proc_dir_inode_operations = {
 	.lookup		= proc_lookup,
 	.getattr	= proc_getattr,
 	.setattr	= proc_notify_change,
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 81c92e9..af15445 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -144,7 +144,7 @@ static const struct file_operations proc_root_operations = {
 /*
  * proc root can do almost nothing..
  */
-static struct inode_operations proc_root_inode_operations = {
+static const struct inode_operations proc_root_inode_operations = {
 	.lookup		= proc_root_lookup,
 	.getattr	= proc_root_getattr,
 };