[PATCH] mark struct inode_operations const 2

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>

6 files changed, 10 insertions, 10 deletions

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index d9ba8cb0ee75..f03a770bacb0 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -65,7 +65,7 @@ const struct file_operations nfs_dir_operations = {
         .fsync          = nfs_fsync_dir,
 };
 
-struct inode_operations nfs_dir_inode_operations = {
+const struct inode_operations nfs_dir_inode_operations = {
         .create         = nfs_create,
         .lookup         = nfs_lookup,
         .link           = nfs_link,
@@ -81,7 +81,7 @@ struct inode_operations nfs_dir_inode_operations = {
 };
 
 #ifdef CONFIG_NFS_V3
-struct inode_operations nfs3_dir_inode_operations = {
+const struct inode_operations nfs3_dir_inode_operations = {
         .create         = nfs_create,
         .lookup         = nfs_lookup,
         .link           = nfs_link,
@@ -104,7 +104,7 @@ struct inode_operations nfs3_dir_inode_operations = {
 #ifdef CONFIG_NFS_V4
 
 static struct dentry *nfs_atomic_lookup(struct inode *, struct dentry *, struct nameidata *);
-struct inode_operations nfs4_dir_inode_operations = {
+const struct inode_operations nfs4_dir_inode_operations = {
         .create         = nfs_create,
         .lookup         = nfs_atomic_lookup,
         .link           = nfs_link,
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 9e4a2b70995a..8e66b5a2d490 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -68,14 +68,14 @@ const struct file_operations nfs_file_operations = {
         .check_flags    = nfs_check_flags,
 };
 
-struct inode_operations nfs_file_inode_operations = {
+const struct inode_operations nfs_file_inode_operations = {
         .permission     = nfs_permission,
         .getattr        = nfs_getattr,
         .setattr        = nfs_setattr,
 };
 
 #ifdef CONFIG_NFS_V3
-struct inode_operations nfs3_file_inode_operations = {
+const struct inode_operations nfs3_file_inode_operations = {
         .permission     = nfs_permission,
         .getattr        = nfs_getattr,
         .setattr        = nfs_setattr,
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index 371b804e7cc8..7f86e65182e4 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -155,12 +155,12 @@ out_follow:
         goto out;
 }
 
-struct inode_operations nfs_mountpoint_inode_operations = {
+const struct inode_operations nfs_mountpoint_inode_operations = {
         .follow_link    = nfs_follow_mountpoint,
         .getattr        = nfs_getattr,
 };
 
-struct inode_operations nfs_referral_inode_operations = {
+const struct inode_operations nfs_referral_inode_operations = {
         .follow_link    = nfs_follow_mountpoint,
 };
 
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index c26cd978c7cc..e2341766c4f0 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -151,7 +151,7 @@ struct nfs4_state_recovery_ops {
 };
 
 extern struct dentry_operations nfs4_dentry_operations;
-extern struct inode_operations nfs4_dir_inode_operations;
+extern const struct inode_operations nfs4_dir_inode_operations;
 
 /* inode.c */
 extern ssize_t nfs4_getxattr(struct dentry *, const char *, void *, size_t);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index b3fd29baadc3..1daee65b517e 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3625,7 +3625,7 @@ struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
         .recover_lock   = nfs4_lock_expired,
 };
 
-static struct inode_operations nfs4_file_inode_operations = {
+static const struct inode_operations nfs4_file_inode_operations = {
         .permission     = nfs_permission,
         .getattr        = nfs_getattr,
         .setattr        = nfs_setattr,
diff --git a/fs/nfs/symlink.c b/fs/nfs/symlink.c
index 525c136c7d8c..f4a0548b9ce8 100644
--- a/fs/nfs/symlink.c
+++ b/fs/nfs/symlink.c
@@ -78,7 +78,7 @@ read_failed:
 /*
  * symlinks can't do much...
  */
-struct inode_operations nfs_symlink_inode_operations = {
+const struct inode_operations nfs_symlink_inode_operations = {
         .readlink       = generic_readlink,
         .follow_link    = nfs_follow_link,
         .put_link       = page_put_link,