[PATCH] mark address_space_operations const

Same as with already do with the file operations: keep them in .rodata and
prevents people from doing runtime patching.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Steven French <sfrench@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 3 insertions, 3 deletions

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 3c74ea729fc7..18dd026f470d 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -210,7 +210,7 @@ static int do_lo_send_aops(struct loop_device *lo, struct bio_vec *bvec,
 {
         struct file *file = lo->lo_backing_file; /* kudos to NFsckingS */
         struct address_space *mapping = file->f_mapping;
-        struct address_space_operations *aops = mapping->a_ops;
+        const struct address_space_operations *aops = mapping->a_ops;
         pgoff_t index;
         unsigned offset, bv_offs;
         int len, ret;
@@ -784,7 +784,7 @@ static int loop_set_fd(struct loop_device *lo, struct file *lo_file,
 
         error = -EINVAL;
         if (S_ISREG(inode->i_mode) || S_ISBLK(inode->i_mode)) {
-                struct address_space_operations *aops = mapping->a_ops;
+                const struct address_space_operations *aops = mapping->a_ops;
                 /*
                  * If we can't read - sorry. If we only can't write - well,
                  * it's going to be read-only.
diff --git a/drivers/block/rd.c b/drivers/block/rd.c
index 940bfd7951e5..0378da04cfa2 100644
--- a/drivers/block/rd.c
+++ b/drivers/block/rd.c
@@ -191,7 +191,7 @@ static int ramdisk_set_page_dirty(struct page *page)
         return 0;
 }
 
-static struct address_space_operations ramdisk_aops = {
+static const struct address_space_operations ramdisk_aops = {
         .readpage       = ramdisk_readpage,
         .prepare_write  = ramdisk_prepare_write,
         .commit_write   = ramdisk_commit_write,