[PATCH] Make most file operations structs in fs/ const

This is a conversion to make the various file_operations structs in fs/
const.  Basically a regexp job, with a few manual fixups

The goal is both to increase correctness (harder to accidentally write to
shared datastructures) and reducing the false sharing of cachelines with
things that get dirty in .data (while .rodata is nicely read only and thus
cache clean)

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 4 insertions, 4 deletions

diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index a7bf9cb2567f..8bc7a5018e40 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -37,7 +37,7 @@ static int jffs2_mknod (struct inode *,struct dentry *,int,dev_t);
 static int jffs2_rename (struct inode *, struct dentry *,
                         struct inode *, struct dentry *);
 
-struct file_operations jffs2_dir_operations =
+const struct file_operations jffs2_dir_operations =
 {
         .read =         generic_read_dir,
         .readdir =      jffs2_readdir,
diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index 935f273dc57b..9f4171213e58 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -38,7 +38,7 @@ int jffs2_fsync(struct file *filp, struct dentry *dentry, int datasync)
         return 0;
 }
 
-struct file_operations jffs2_file_operations =
+const struct file_operations jffs2_file_operations =
 {
         .llseek =       generic_file_llseek,
         .open =         generic_file_open,
diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h
index 59e7a393200c..d307cf548625 100644
--- a/fs/jffs2/os-linux.h
+++ b/fs/jffs2/os-linux.h
@@ -159,11 +159,11 @@ void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
 
 /* dir.c */
-extern struct file_operations jffs2_dir_operations;
+extern const struct file_operations jffs2_dir_operations;
 extern struct inode_operations jffs2_dir_inode_operations;
 
 /* file.c */
-extern struct file_operations jffs2_file_operations;
+extern const struct file_operations jffs2_file_operations;
 extern struct inode_operations jffs2_file_inode_operations;
 extern struct address_space_operations jffs2_file_address_operations;
 int jffs2_fsync(struct file *, struct dentry *, int);