[PATCH] mark struct inode_operations const 1

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, 9 insertions, 9 deletions

diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index 216b1a364ccb..6b4cec3f272f 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -168,11 +168,11 @@ int autofs4_expire_multi(struct super_block *, struct vfsmount *,
 
 /* Operations structures */
 
-extern struct inode_operations autofs4_symlink_inode_operations;
-extern struct inode_operations autofs4_dir_inode_operations;
-extern struct inode_operations autofs4_root_inode_operations;
-extern struct inode_operations autofs4_indirect_root_inode_operations;
-extern struct inode_operations autofs4_direct_root_inode_operations;
+extern const struct inode_operations autofs4_symlink_inode_operations;
+extern const struct inode_operations autofs4_dir_inode_operations;
+extern const struct inode_operations autofs4_root_inode_operations;
+extern const struct inode_operations autofs4_indirect_root_inode_operations;
+extern const struct inode_operations autofs4_direct_root_inode_operations;
 extern const struct file_operations autofs4_dir_operations;
 extern const struct file_operations autofs4_root_operations;
 
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 8d05b9f7578d..47fee96c2182 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -47,7 +47,7 @@ const struct file_operations autofs4_dir_operations = {
         .readdir        = autofs4_dir_readdir,
 };
 
-struct inode_operations autofs4_indirect_root_inode_operations = {
+const struct inode_operations autofs4_indirect_root_inode_operations = {
         .lookup         = autofs4_lookup,
         .unlink         = autofs4_dir_unlink,
         .symlink        = autofs4_dir_symlink,
@@ -55,7 +55,7 @@ struct inode_operations autofs4_indirect_root_inode_operations = {
         .rmdir          = autofs4_dir_rmdir,
 };
 
-struct inode_operations autofs4_direct_root_inode_operations = {
+const struct inode_operations autofs4_direct_root_inode_operations = {
         .lookup         = autofs4_lookup,
         .unlink         = autofs4_dir_unlink,
         .mkdir          = autofs4_dir_mkdir,
@@ -63,7 +63,7 @@ struct inode_operations autofs4_direct_root_inode_operations = {
         .follow_link    = autofs4_follow_link,
 };
 
-struct inode_operations autofs4_dir_inode_operations = {
+const struct inode_operations autofs4_dir_inode_operations = {
         .lookup         = autofs4_lookup,
         .unlink         = autofs4_dir_unlink,
         .symlink        = autofs4_dir_symlink,
diff --git a/fs/autofs4/symlink.c b/fs/autofs4/symlink.c
index 2ea2c98fd84b..b4ea82934d2e 100644
--- a/fs/autofs4/symlink.c
+++ b/fs/autofs4/symlink.c
@@ -19,7 +19,7 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd)
         return NULL;
 }
 
-struct inode_operations autofs4_symlink_inode_operations = {
+const struct inode_operations autofs4_symlink_inode_operations = {
         .readlink       = generic_readlink,
         .follow_link    = autofs4_follow_link
 };