[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>

89 files changed, 121 insertions, 121 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,
diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h
index f867b8d3e973..450b0c1b385e 100644
--- a/fs/9p/v9fs_vfs.h
+++ b/fs/9p/v9fs_vfs.h
@@ -38,7 +38,7 @@
  */
 
 extern struct file_system_type v9fs_fs_type;
-extern struct address_space_operations v9fs_addr_operations;
+extern const struct address_space_operations v9fs_addr_operations;
 extern const struct file_operations v9fs_file_operations;
 extern const struct file_operations v9fs_dir_operations;
 extern struct dentry_operations v9fs_dentry_operations;
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c
index efda46fb64d9..d4f0aa3c87f2 100644
--- a/fs/9p/vfs_addr.c
+++ b/fs/9p/vfs_addr.c
@@ -103,6 +103,6 @@ UnmapAndUnlock:
         return retval;
 }
 
-struct address_space_operations v9fs_addr_operations = {
+const struct address_space_operations v9fs_addr_operations = {
       .readpage = v9fs_vfs_readpage,
 };
diff --git a/fs/adfs/inode.c b/fs/adfs/inode.c
index a02802a30798..534f3eecc985 100644
--- a/fs/adfs/inode.c
+++ b/fs/adfs/inode.c
@@ -72,7 +72,7 @@ static sector_t _adfs_bmap(struct address_space *mapping, sector_t block)
         return generic_block_bmap(mapping, block, adfs_get_block);
 }
 
-static struct address_space_operations adfs_aops = {
+static const struct address_space_operations adfs_aops = {
         .readpage       = adfs_readpage,
         .writepage      = adfs_writepage,
         .sync_page      = block_sync_page,
diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index a43a876742b8..0ddd4cc0d1a0 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -195,9 +195,9 @@ extern struct inode_operations   affs_symlink_inode_operations;
 extern const struct file_operations      affs_file_operations;
 extern const struct file_operations      affs_file_operations_ofs;
 extern const struct file_operations      affs_dir_operations;
-extern struct address_space_operations   affs_symlink_aops;
-extern struct address_space_operations   affs_aops;
-extern struct address_space_operations   affs_aops_ofs;
+extern const struct address_space_operations     affs_symlink_aops;
+extern const struct address_space_operations     affs_aops;
+extern const struct address_space_operations     affs_aops_ofs;
 
 extern struct dentry_operations  affs_dentry_operations;
 extern struct dentry_operations  affs_dentry_operations_intl;
diff --git a/fs/affs/file.c b/fs/affs/file.c
index 7076262af39b..3de8590e4f6a 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -406,7 +406,7 @@ static sector_t _affs_bmap(struct address_space *mapping, sector_t block)
 {
         return generic_block_bmap(mapping,block,affs_get_block);
 }
-struct address_space_operations affs_aops = {
+const struct address_space_operations affs_aops = {
         .readpage = affs_readpage,
         .writepage = affs_writepage,
         .sync_page = block_sync_page,
@@ -759,7 +759,7 @@ out:
         goto done;
 }
 
-struct address_space_operations affs_aops_ofs = {
+const struct address_space_operations affs_aops_ofs = {
         .readpage = affs_readpage_ofs,
         //.writepage = affs_writepage_ofs,
         //.sync_page = affs_sync_page_ofs,
diff --git a/fs/affs/symlink.c b/fs/affs/symlink.c
index 426f0f094f23..f802256a5933 100644
--- a/fs/affs/symlink.c
+++ b/fs/affs/symlink.c
@@ -66,7 +66,7 @@ fail:
         return err;
 }
 
-struct address_space_operations affs_symlink_aops = {
+const struct address_space_operations affs_symlink_aops = {
         .readpage       = affs_symlink_readpage,
 };
 
diff --git a/fs/afs/file.c b/fs/afs/file.c
index 7bb716887e29..67d6634101fd 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -35,7 +35,7 @@ struct inode_operations afs_file_inode_operations = {
         .getattr        = afs_inode_getattr,
 };
 
-struct address_space_operations afs_fs_aops = {
+const struct address_space_operations afs_fs_aops = {
         .readpage       = afs_file_readpage,
         .sync_page      = block_sync_page,
         .set_page_dirty = __set_page_dirty_nobuffers,
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 72febdf9a35a..e88b3b65ae49 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -69,7 +69,7 @@ extern const struct file_operations afs_dir_file_operations;
 /*
  * file.c
  */
-extern struct address_space_operations afs_fs_aops;
+extern const struct address_space_operations afs_fs_aops;
 extern struct inode_operations afs_file_inode_operations;
 
 #ifdef AFS_CACHING_SUPPORT
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 08201fab26cd..a83e889a97cd 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -73,7 +73,7 @@ static struct inode_operations befs_dir_inode_operations = {
         .lookup         = befs_lookup,
 };
 
-static struct address_space_operations befs_aops = {
+static const struct address_space_operations befs_aops = {
         .readpage       = befs_readpage,
         .sync_page      = block_sync_page,
         .bmap           = befs_bmap,
diff --git a/fs/bfs/bfs.h b/fs/bfs/bfs.h
index 9d791004b21c..31973bbbf057 100644
--- a/fs/bfs/bfs.h
+++ b/fs/bfs/bfs.h
@@ -50,7 +50,7 @@ static inline struct bfs_inode_info *BFS_I(struct inode *inode)
 /* file.c */
 extern struct inode_operations bfs_file_inops;
 extern const struct file_operations bfs_file_operations;
-extern struct address_space_operations bfs_aops;
+extern const struct address_space_operations bfs_aops;
 
 /* dir.c */
 extern struct inode_operations bfs_dir_inops;
diff --git a/fs/bfs/file.c b/fs/bfs/file.c
index d83cd74a2e4e..3d5aca28a0a0 100644
--- a/fs/bfs/file.c
+++ b/fs/bfs/file.c
@@ -153,7 +153,7 @@ static sector_t bfs_bmap(struct address_space *mapping, sector_t block)
         return generic_block_bmap(mapping, block, bfs_get_block);
 }
 
-struct address_space_operations bfs_aops = {
+const struct address_space_operations bfs_aops = {
         .readpage       = bfs_readpage,
         .writepage      = bfs_writepage,
         .sync_page      = block_sync_page,
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 028d9fb9c2d5..7f7600e2381c 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1095,7 +1095,7 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
         return blkdev_ioctl(file->f_mapping->host, file, cmd, arg);
 }
 
-struct address_space_operations def_blk_aops = {
+const struct address_space_operations def_blk_aops = {
         .readpage       = blkdev_readpage,
         .writepage      = blkdev_writepage,
         .sync_page      = block_sync_page,
diff --git a/fs/buffer.c b/fs/buffer.c
index f23bb647db47..e9994722f4a3 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2598,7 +2598,7 @@ int nobh_truncate_page(struct address_space *mapping, loff_t from)
         unsigned offset = from & (PAGE_CACHE_SIZE-1);
         unsigned to;
         struct page *page;
-        struct address_space_operations *a_ops = mapping->a_ops;
+        const struct address_space_operations *a_ops = mapping->a_ops;
         char *kaddr;
         int ret = 0;
 
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index a6384d83fdef..8f75c6f24701 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -32,8 +32,8 @@
 #define TRUE 1
 #endif
 
-extern struct address_space_operations cifs_addr_ops;
-extern struct address_space_operations cifs_addr_ops_smallbuf;
+extern const struct address_space_operations cifs_addr_ops;
+extern const struct address_space_operations cifs_addr_ops_smallbuf;
 
 /* Functions related to super block operations */
 extern struct super_operations cifs_super_ops;
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index e9c1573f6aa7..5861eb42e626 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1942,7 +1942,7 @@ static int cifs_prepare_write(struct file *file, struct page *page,
         return 0;
 }
 
-struct address_space_operations cifs_addr_ops = {
+const struct address_space_operations cifs_addr_ops = {
         .readpage = cifs_readpage,
         .readpages = cifs_readpages,
         .writepage = cifs_writepage,
@@ -1959,7 +1959,7 @@ struct address_space_operations cifs_addr_ops = {
  * contain the header plus one complete page of data.  Otherwise, we need
  * to leave cifs_readpages out of the address space operations.
  */
-struct address_space_operations cifs_addr_ops_smallbuf = {
+const struct address_space_operations cifs_addr_ops_smallbuf = {
         .readpage = cifs_readpage,
         .writepage = cifs_writepage,
         .writepages = cifs_writepages,
diff --git a/fs/coda/symlink.c b/fs/coda/symlink.c
index b35e5bbd9c99..76e00a65a75b 100644
--- a/fs/coda/symlink.c
+++ b/fs/coda/symlink.c
@@ -50,6 +50,6 @@ fail:
         return error;
 }
 
-struct address_space_operations coda_symlink_aops = {
+const struct address_space_operations coda_symlink_aops = {
         .readpage       = coda_symlink_filler,
 };
diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c
index c153bd9534cb..e14488ca6411 100644
--- a/fs/configfs/inode.c
+++ b/fs/configfs/inode.c
@@ -38,7 +38,7 @@
 
 extern struct super_block * configfs_sb;
 
-static struct address_space_operations configfs_aops = {
+static const struct address_space_operations configfs_aops = {
         .readpage       = simple_readpage,
         .prepare_write  = simple_prepare_write,
         .commit_write   = simple_commit_write
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index c45d73860803..223c0431042d 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -30,7 +30,7 @@
 static struct super_operations cramfs_ops;
 static struct inode_operations cramfs_dir_inode_operations;
 static const struct file_operations cramfs_directory_operations;
-static struct address_space_operations cramfs_aops;
+static const struct address_space_operations cramfs_aops;
 
 static DEFINE_MUTEX(read_mutex);
 
@@ -501,7 +501,7 @@ static int cramfs_readpage(struct file *file, struct page * page)
         return 0;
 }
 
-static struct address_space_operations cramfs_aops = {
+static const struct address_space_operations cramfs_aops = {
         .readpage = cramfs_readpage
 };
 
diff --git a/fs/efs/inode.c b/fs/efs/inode.c
index 180607f9314d..174696f9bf14 100644
--- a/fs/efs/inode.c
+++ b/fs/efs/inode.c
@@ -21,7 +21,7 @@ static sector_t _efs_bmap(struct address_space *mapping, sector_t block)
 {
         return generic_block_bmap(mapping,block,efs_get_block);
 }
-static struct address_space_operations efs_aops = {
+static const struct address_space_operations efs_aops = {
         .readpage = efs_readpage,
         .sync_page = block_sync_page,
         .bmap = _efs_bmap
diff --git a/fs/efs/symlink.c b/fs/efs/symlink.c
index 3d9a350e3e7f..e249cf733a6b 100644
--- a/fs/efs/symlink.c
+++ b/fs/efs/symlink.c
@@ -53,6 +53,6 @@ fail:
         return err;
 }
 
-struct address_space_operations efs_symlink_aops = {
+const struct address_space_operations efs_symlink_aops = {
         .readpage       = efs_symlink_readpage
 };
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index 9f74a62be555..e65a019fc7a5 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -162,9 +162,9 @@ extern const struct file_operations ext2_file_operations;
 extern const struct file_operations ext2_xip_file_operations;
 
 /* inode.c */
-extern struct address_space_operations ext2_aops;
-extern struct address_space_operations ext2_aops_xip;
-extern struct address_space_operations ext2_nobh_aops;
+extern const struct address_space_operations ext2_aops;
+extern const struct address_space_operations ext2_aops_xip;
+extern const struct address_space_operations ext2_nobh_aops;
 
 /* namei.c */
 extern struct inode_operations ext2_dir_inode_operations;
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 04af9c45dce2..fb4d3220eb8d 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -684,7 +684,7 @@ ext2_writepages(struct address_space *mapping, struct writeback_control *wbc)
         return mpage_writepages(mapping, wbc, ext2_get_block);
 }
 
-struct address_space_operations ext2_aops = {
+const struct address_space_operations ext2_aops = {
         .readpage               = ext2_readpage,
         .readpages              = ext2_readpages,
         .writepage              = ext2_writepage,
@@ -697,12 +697,12 @@ struct address_space_operations ext2_aops = {
         .migratepage            = buffer_migrate_page,
 };
 
-struct address_space_operations ext2_aops_xip = {
+const struct address_space_operations ext2_aops_xip = {
         .bmap                   = ext2_bmap,
         .get_xip_page           = ext2_get_xip_page,
 };
 
-struct address_space_operations ext2_nobh_aops = {
+const struct address_space_operations ext2_nobh_aops = {
         .readpage               = ext2_readpage,
         .readpages              = ext2_readpages,
         .writepage              = ext2_nobh_writepage,
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 0321e1b9034a..f804d5e9d60c 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1698,7 +1698,7 @@ static int ext3_journalled_set_page_dirty(struct page *page)
         return __set_page_dirty_nobuffers(page);
 }
 
-static struct address_space_operations ext3_ordered_aops = {
+static const struct address_space_operations ext3_ordered_aops = {
         .readpage       = ext3_readpage,
         .readpages      = ext3_readpages,
         .writepage      = ext3_ordered_writepage,
@@ -1712,7 +1712,7 @@ static struct address_space_operations ext3_ordered_aops = {
         .migratepage    = buffer_migrate_page,
 };
 
-static struct address_space_operations ext3_writeback_aops = {
+static const struct address_space_operations ext3_writeback_aops = {
         .readpage       = ext3_readpage,
         .readpages      = ext3_readpages,
         .writepage      = ext3_writeback_writepage,
@@ -1726,7 +1726,7 @@ static struct address_space_operations ext3_writeback_aops = {
         .migratepage    = buffer_migrate_page,
 };
 
-static struct address_space_operations ext3_journalled_aops = {
+static const struct address_space_operations ext3_journalled_aops = {
         .readpage       = ext3_readpage,
         .readpages      = ext3_readpages,
         .writepage      = ext3_journalled_writepage,
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 7c35d582ec10..31b7174176ba 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -196,7 +196,7 @@ static sector_t _fat_bmap(struct address_space *mapping, sector_t block)
         return generic_block_bmap(mapping, block, fat_get_block);
 }
 
-static struct address_space_operations fat_aops = {
+static const struct address_space_operations fat_aops = {
         .readpage       = fat_readpage,
         .readpages      = fat_readpages,
         .writepage      = fat_writepage,
diff --git a/fs/freevxfs/vxfs_immed.c b/fs/freevxfs/vxfs_immed.c
index 6f5df1700e95..4e25f3fbed86 100644
--- a/fs/freevxfs/vxfs_immed.c
+++ b/fs/freevxfs/vxfs_immed.c
@@ -56,7 +56,7 @@ struct inode_operations vxfs_immed_symlink_iops = {
 /*
  * Adress space operations for immed files and directories.
  */
-struct address_space_operations vxfs_immed_aops = {
+const struct address_space_operations vxfs_immed_aops = {
         .readpage =             vxfs_immed_readpage,
 };
 
diff --git a/fs/freevxfs/vxfs_inode.c b/fs/freevxfs/vxfs_inode.c
index f544aae9169f..ca6a39714771 100644
--- a/fs/freevxfs/vxfs_inode.c
+++ b/fs/freevxfs/vxfs_inode.c
@@ -41,8 +41,8 @@
 #include "vxfs_extern.h"
 
 
-extern struct address_space_operations vxfs_aops;
-extern struct address_space_operations vxfs_immed_aops;
+extern const struct address_space_operations vxfs_aops;
+extern const struct address_space_operations vxfs_immed_aops;
 
 extern struct inode_operations vxfs_immed_symlink_iops;
 
@@ -295,7 +295,7 @@ vxfs_read_inode(struct inode *ip)
 {
         struct super_block              *sbp = ip->i_sb;
         struct vxfs_inode_info          *vip;
-        struct address_space_operations *aops;
+        const struct address_space_operations   *aops;
         ino_t                           ino = ip->i_ino;
 
         if (!(vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_ilist)))
diff --git a/fs/freevxfs/vxfs_subr.c b/fs/freevxfs/vxfs_subr.c
index c1be118fc067..decac62efe57 100644
--- a/fs/freevxfs/vxfs_subr.c
+++ b/fs/freevxfs/vxfs_subr.c
@@ -42,7 +42,7 @@
 static int              vxfs_readpage(struct file *, struct page *);
 static sector_t         vxfs_bmap(struct address_space *, sector_t);
 
-struct address_space_operations vxfs_aops = {
+const struct address_space_operations vxfs_aops = {
         .readpage =             vxfs_readpage,
         .bmap =                 vxfs_bmap,
         .sync_page =            block_sync_page,
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 28aa81eae2cc..63614ed16336 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -770,7 +770,7 @@ static const struct file_operations fuse_direct_io_file_operations = {
         /* no mmap and sendfile */
 };
 
-static struct address_space_operations fuse_file_aops  = {
+static const struct address_space_operations fuse_file_aops  = {
         .readpage       = fuse_readpage,
         .prepare_write  = fuse_prepare_write,
         .commit_write   = fuse_commit_write,
diff --git a/fs/hfs/hfs_fs.h b/fs/hfs/hfs_fs.h
index 3ed8663a8db1..735332dfd1b8 100644
--- a/fs/hfs/hfs_fs.h
+++ b/fs/hfs/hfs_fs.h
@@ -182,8 +182,8 @@ extern void hfs_file_truncate(struct inode *);
 extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
 
 /* inode.c */
-extern struct address_space_operations hfs_aops;
-extern struct address_space_operations hfs_btree_aops;
+extern const struct address_space_operations hfs_aops;
+extern const struct address_space_operations hfs_btree_aops;
 
 extern struct inode *hfs_new_inode(struct inode *, struct qstr *, int);
 extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *);
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index 2d4ced22201b..315cf44a90b2 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -114,7 +114,7 @@ static int hfs_writepages(struct address_space *mapping,
         return mpage_writepages(mapping, wbc, hfs_get_block);
 }
 
-struct address_space_operations hfs_btree_aops = {
+const struct address_space_operations hfs_btree_aops = {
         .readpage       = hfs_readpage,
         .writepage      = hfs_writepage,
         .sync_page      = block_sync_page,
@@ -124,7 +124,7 @@ struct address_space_operations hfs_btree_aops = {
         .releasepage    = hfs_releasepage,
 };
 
-struct address_space_operations hfs_aops = {
+const struct address_space_operations hfs_aops = {
         .readpage       = hfs_readpage,
         .writepage      = hfs_writepage,
         .sync_page      = block_sync_page,
diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h
index 7ae393637a0c..8a1ca5ef7ada 100644
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/fs/hfsplus/hfsplus_fs.h
@@ -323,8 +323,8 @@ int hfsplus_file_extend(struct inode *);
 void hfsplus_file_truncate(struct inode *);
 
 /* inode.c */
-extern struct address_space_operations hfsplus_aops;
-extern struct address_space_operations hfsplus_btree_aops;
+extern const struct address_space_operations hfsplus_aops;
+extern const struct address_space_operations hfsplus_btree_aops;
 
 void hfsplus_inode_read_fork(struct inode *, struct hfsplus_fork_raw *);
 void hfsplus_inode_write_fork(struct inode *, struct hfsplus_fork_raw *);
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index acf66dba3e01..924ecdef8091 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -109,7 +109,7 @@ static int hfsplus_writepages(struct address_space *mapping,
         return mpage_writepages(mapping, wbc, hfsplus_get_block);
 }
 
-struct address_space_operations hfsplus_btree_aops = {
+const struct address_space_operations hfsplus_btree_aops = {
         .readpage       = hfsplus_readpage,
         .writepage      = hfsplus_writepage,
         .sync_page      = block_sync_page,
@@ -119,7 +119,7 @@ struct address_space_operations hfsplus_btree_aops = {
         .releasepage    = hfsplus_releasepage,
 };
 
-struct address_space_operations hfsplus_aops = {
+const struct address_space_operations hfsplus_aops = {
         .readpage       = hfsplus_readpage,
         .writepage      = hfsplus_writepage,
         .sync_page      = block_sync_page,
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 8e0d37743e7c..b82e3d9c8790 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -54,7 +54,7 @@ static int append = 0;
 
 static struct inode_operations hostfs_iops;
 static struct inode_operations hostfs_dir_iops;
-static struct address_space_operations hostfs_link_aops;
+static const struct address_space_operations hostfs_link_aops;
 
 #ifndef MODULE
 static int __init hostfs_args(char *options, int *add)
@@ -518,7 +518,7 @@ int hostfs_commit_write(struct file *file, struct page *page, unsigned from,
         return(err);
 }
 
-static struct address_space_operations hostfs_aops = {
+static const struct address_space_operations hostfs_aops = {
         .writepage      = hostfs_writepage,
         .readpage       = hostfs_readpage,
         .set_page_dirty = __set_page_dirty_nobuffers,
@@ -935,7 +935,7 @@ int hostfs_link_readpage(struct file *file, struct page *page)
         return(err);
 }
 
-static struct address_space_operations hostfs_link_aops = {
+static const struct address_space_operations hostfs_link_aops = {
         .readpage       = hostfs_link_readpage,
 };
 
diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c
index d3b9fffe45a1..d9eb19b7b8ae 100644
--- a/fs/hpfs/file.c
+++ b/fs/hpfs/file.c
@@ -99,7 +99,7 @@ static sector_t _hpfs_bmap(struct address_space *mapping, sector_t block)
 {
         return generic_block_bmap(mapping,block,hpfs_get_block);
 }
-struct address_space_operations hpfs_aops = {
+const struct address_space_operations hpfs_aops = {
         .readpage = hpfs_readpage,
         .writepage = hpfs_writepage,
         .sync_page = block_sync_page,
diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h
index 29b7a3e55173..f687d54ed442 100644
--- a/fs/hpfs/hpfs_fn.h
+++ b/fs/hpfs/hpfs_fn.h
@@ -268,7 +268,7 @@ void hpfs_set_ea(struct inode *, struct fnode *, char *, char *, int);
 int hpfs_file_fsync(struct file *, struct dentry *, int);
 extern const struct file_operations hpfs_file_ops;
 extern struct inode_operations hpfs_file_iops;
-extern struct address_space_operations hpfs_aops;
+extern const struct address_space_operations hpfs_aops;
 
 /* inode.c */
 
@@ -304,7 +304,7 @@ void hpfs_decide_conv(struct inode *, unsigned char *, unsigned);
 /* namei.c */
 
 extern struct inode_operations hpfs_dir_iops;
-extern struct address_space_operations hpfs_symlink_aops;
+extern const struct address_space_operations hpfs_symlink_aops;
 
 static inline struct hpfs_inode_info *hpfs_i(struct inode *inode)
 {
diff --git a/fs/hpfs/namei.c b/fs/hpfs/namei.c
index a03abb12c610..59e7dc182a0c 100644
--- a/fs/hpfs/namei.c
+++ b/fs/hpfs/namei.c
@@ -538,7 +538,7 @@ fail:
         return err;
 }
 
-struct address_space_operations hpfs_symlink_aops = {
+const struct address_space_operations hpfs_symlink_aops = {
         .readpage       = hpfs_symlink_readpage
 };
         
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index e6410d8edd0e..6449cb697967 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -34,7 +34,7 @@
 #define HUGETLBFS_MAGIC 0x958458f6
 
 static struct super_operations hugetlbfs_ops;
-static struct address_space_operations hugetlbfs_aops;
+static const struct address_space_operations hugetlbfs_aops;
 const struct file_operations hugetlbfs_file_operations;
 static struct inode_operations hugetlbfs_dir_inode_operations;
 static struct inode_operations hugetlbfs_inode_operations;
@@ -547,7 +547,7 @@ static void hugetlbfs_destroy_inode(struct inode *inode)
         kmem_cache_free(hugetlbfs_inode_cachep, HUGETLBFS_I(inode));
 }
 
-static struct address_space_operations hugetlbfs_aops = {
+static const struct address_space_operations hugetlbfs_aops = {
         .readpage       = hugetlbfs_readpage,
         .prepare_write  = hugetlbfs_prepare_write,
         .commit_write   = hugetlbfs_commit_write,
diff --git a/fs/inode.c b/fs/inode.c
index 3a2446a27d2c..f42961eb983b 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -102,7 +102,7 @@ static kmem_cache_t * inode_cachep __read_mostly;
 
 static struct inode *alloc_inode(struct super_block *sb)
 {
-        static struct address_space_operations empty_aops;
+        static const struct address_space_operations empty_aops;
         static struct inode_operations empty_iops;
         static const struct file_operations empty_fops;
         struct inode *inode;
diff --git a/fs/isofs/compress.c b/fs/isofs/compress.c
index 4917315db732..3a39158cca96 100644
--- a/fs/isofs/compress.c
+++ b/fs/isofs/compress.c
@@ -312,7 +312,7 @@ eio:
         return err;
 }
 
-struct address_space_operations zisofs_aops = {
+const struct address_space_operations zisofs_aops = {
         .readpage = zisofs_readpage,
         /* No sync_page operation supported? */
         /* No bmap operation supported */
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 3f9c8ba1fa1f..bb11c7fb4019 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -1054,7 +1054,7 @@ static sector_t _isofs_bmap(struct address_space *mapping, sector_t block)
         return generic_block_bmap(mapping,block,isofs_get_block);
 }
 
-static struct address_space_operations isofs_aops = {
+static const struct address_space_operations isofs_aops = {
         .readpage = isofs_readpage,
         .sync_page = block_sync_page,
         .bmap = _isofs_bmap
diff --git a/fs/isofs/isofs.h b/fs/isofs/isofs.h
index b87ba066f5e7..e6308c8b5735 100644
--- a/fs/isofs/isofs.h
+++ b/fs/isofs/isofs.h
@@ -176,5 +176,5 @@ isofs_normalize_block_and_offset(struct iso_directory_record* de,
 
 extern struct inode_operations isofs_dir_inode_operations;
 extern const struct file_operations isofs_dir_operations;
-extern struct address_space_operations isofs_symlink_aops;
+extern const struct address_space_operations isofs_symlink_aops;
 extern struct export_operations isofs_export_ops;
diff --git a/fs/isofs/rock.c b/fs/isofs/rock.c
index 4326cb47f8fa..f3a1db3098de 100644
--- a/fs/isofs/rock.c
+++ b/fs/isofs/rock.c
@@ -754,6 +754,6 @@ error:
         return -EIO;
 }
 
-struct address_space_operations isofs_symlink_aops = {
+const struct address_space_operations isofs_symlink_aops = {
         .readpage = rock_ridge_symlink_readpage
 };
diff --git a/fs/isofs/zisofs.h b/fs/isofs/zisofs.h
index d78485d101c2..273795709155 100644
--- a/fs/isofs/zisofs.h
+++ b/fs/isofs/zisofs.h
@@ -15,7 +15,7 @@
  */
 
 #ifdef CONFIG_ZISOFS
-extern struct address_space_operations zisofs_aops;
+extern const struct address_space_operations zisofs_aops;
 extern int __init zisofs_init(void);
 extern void zisofs_cleanup(void);
 #endif
diff --git a/fs/jffs/inode-v23.c b/fs/jffs/inode-v23.c
index 9e46ea6da752..93068697a9bf 100644
--- a/fs/jffs/inode-v23.c
+++ b/fs/jffs/inode-v23.c
@@ -59,7 +59,7 @@ static const struct file_operations jffs_file_operations;
 static struct inode_operations jffs_file_inode_operations;
 static const struct file_operations jffs_dir_operations;
 static struct inode_operations jffs_dir_inode_operations;
-static struct address_space_operations jffs_address_operations;
+static const struct address_space_operations jffs_address_operations;
 
 kmem_cache_t     *node_cache = NULL;
 kmem_cache_t     *fm_cache = NULL;
@@ -1614,7 +1614,7 @@ jffs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 } /* jffs_ioctl()  */
 
 
-static struct address_space_operations jffs_address_operations = {
+static const struct address_space_operations jffs_address_operations = {
         .readpage       = jffs_readpage,
         .prepare_write  = jffs_prepare_write,
         .commit_write   = jffs_commit_write,
diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index bb8844f40e48..3ed6e3e120b6 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -62,7 +62,7 @@ struct inode_operations jffs2_file_inode_operations =
         .removexattr =  jffs2_removexattr
 };
 
-struct address_space_operations jffs2_file_address_operations =
+const struct address_space_operations jffs2_file_address_operations =
 {
         .readpage =     jffs2_readpage,
         .prepare_write =jffs2_prepare_write,
diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h
index 6b5223565405..9f41fc01a371 100644
--- a/fs/jffs2/os-linux.h
+++ b/fs/jffs2/os-linux.h
@@ -158,7 +158,7 @@ extern struct inode_operations jffs2_dir_inode_operations;
 /* file.c */
 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;
+extern const struct address_space_operations jffs2_file_address_operations;
 int jffs2_fsync(struct file *, struct dentry *, int);
 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
 
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index 04eb78f1252e..43e3f566aad6 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -305,7 +305,7 @@ static ssize_t jfs_direct_IO(int rw, struct kiocb *iocb,
                                 offset, nr_segs, jfs_get_block, NULL);
 }
 
-struct address_space_operations jfs_aops = {
+const struct address_space_operations jfs_aops = {
         .readpage       = jfs_readpage,
         .readpages      = jfs_readpages,
         .writepage      = jfs_writepage,
diff --git a/fs/jfs/jfs_inode.h b/fs/jfs/jfs_inode.h
index c30072674464..b5c7da6190dc 100644
--- a/fs/jfs/jfs_inode.h
+++ b/fs/jfs/jfs_inode.h
@@ -33,7 +33,7 @@ extern void jfs_free_zero_link(struct inode *);
 extern struct dentry *jfs_get_parent(struct dentry *dentry);
 extern void jfs_set_inode_flags(struct inode *);
 
-extern struct address_space_operations jfs_aops;
+extern const struct address_space_operations jfs_aops;
 extern struct inode_operations jfs_dir_inode_operations;
 extern const struct file_operations jfs_dir_operations;
 extern struct inode_operations jfs_file_inode_operations;
diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c
index 7f6e88039700..e1e0a6e6ebdf 100644
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -577,7 +577,7 @@ static void metapage_invalidatepage(struct page *page, unsigned long offset)
         metapage_releasepage(page, 0);
 }
 
-struct address_space_operations jfs_metapage_aops = {
+const struct address_space_operations jfs_metapage_aops = {
         .readpage       = metapage_readpage,
         .writepage      = metapage_writepage,
         .sync_page      = block_sync_page,
diff --git a/fs/jfs/jfs_metapage.h b/fs/jfs/jfs_metapage.h
index f0b7d3282b07..d17a3290f5aa 100644
--- a/fs/jfs/jfs_metapage.h
+++ b/fs/jfs/jfs_metapage.h
@@ -139,7 +139,7 @@ static inline void metapage_homeok(struct metapage *mp)
         put_metapage(mp);
 }
 
-extern struct address_space_operations jfs_metapage_aops;
+extern const struct address_space_operations jfs_metapage_aops;
 
 /*
  * This routines invalidate all pages for an extent.
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index a6fb509b7341..9ea91c5eeb7b 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -335,7 +335,7 @@ static sector_t minix_bmap(struct address_space *mapping, sector_t block)
 {
         return generic_block_bmap(mapping,block,minix_get_block);
 }
-static struct address_space_operations minix_aops = {
+static const struct address_space_operations minix_aops = {
         .readpage = minix_readpage,
         .writepage = minix_writepage,
         .sync_page = block_sync_page,
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index 90d2ea28f333..6c51c1198464 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -105,7 +105,7 @@ static struct super_operations ncp_sops =
 
 extern struct dentry_operations ncp_root_dentry_operations;
 #if defined(CONFIG_NCPFS_EXTRAS) || defined(CONFIG_NCPFS_NFS_NS)
-extern struct address_space_operations ncp_symlink_aops;
+extern const struct address_space_operations ncp_symlink_aops;
 extern int ncp_symlink(struct inode*, struct dentry*, const char*);
 #endif
 
diff --git a/fs/ncpfs/symlink.c b/fs/ncpfs/symlink.c
index e935f1b34bc2..f76b1392a012 100644
--- a/fs/ncpfs/symlink.c
+++ b/fs/ncpfs/symlink.c
@@ -99,7 +99,7 @@ fail:
 /*
  * symlinks can't do much...
  */
-struct address_space_operations ncp_symlink_aops = {
+const struct address_space_operations ncp_symlink_aops = {
         .readpage       = ncp_symlink_readpage,
 };
         
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index add289138836..cc2b874ad5a4 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -315,7 +315,7 @@ static int nfs_release_page(struct page *page, gfp_t gfp)
         return !nfs_wb_page(page->mapping->host, page);
 }
 
-struct address_space_operations nfs_file_aops = {
+const struct address_space_operations nfs_file_aops = {
         .readpage = nfs_readpage,
         .readpages = nfs_readpages,
         .set_page_dirty = __set_page_dirty_nobuffers,
diff --git a/fs/ntfs/aops.c b/fs/ntfs/aops.c
index 580412d330cb..bc579bfdfbd8 100644
--- a/fs/ntfs/aops.c
+++ b/fs/ntfs/aops.c
@@ -1544,7 +1544,7 @@ err_out:
 /**
  * ntfs_aops - general address space operations for inodes and attributes
  */
-struct address_space_operations ntfs_aops = {
+const struct address_space_operations ntfs_aops = {
         .readpage       = ntfs_readpage,        /* Fill page with data. */
         .sync_page      = block_sync_page,      /* Currently, just unplugs the
                                                    disk request queue. */
@@ -1560,7 +1560,7 @@ struct address_space_operations ntfs_aops = {
  * ntfs_mst_aops - general address space operations for mst protecteed inodes
  *                 and attributes
  */
-struct address_space_operations ntfs_mst_aops = {
+const struct address_space_operations ntfs_mst_aops = {
         .readpage       = ntfs_readpage,        /* Fill page with data. */
         .sync_page      = block_sync_page,      /* Currently, just unplugs the
                                                    disk request queue. */
diff --git a/fs/ntfs/ntfs.h b/fs/ntfs/ntfs.h
index bf7b3d7c0930..ddd3d503097c 100644
--- a/fs/ntfs/ntfs.h
+++ b/fs/ntfs/ntfs.h
@@ -57,8 +57,8 @@ extern struct kmem_cache *ntfs_attr_ctx_cache;
 extern struct kmem_cache *ntfs_index_ctx_cache;
 
 /* The various operations structs defined throughout the driver files. */
-extern struct address_space_operations ntfs_aops;
-extern struct address_space_operations ntfs_mst_aops;
+extern const struct address_space_operations ntfs_aops;
+extern const struct address_space_operations ntfs_mst_aops;
 
 extern const struct  file_operations ntfs_file_ops;
 extern struct inode_operations ntfs_file_inode_ops;
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 47152bf9a7f2..cca71317b6d6 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -666,7 +666,7 @@ out:
         return ret;
 }
 
-struct address_space_operations ocfs2_aops = {
+const struct address_space_operations ocfs2_aops = {
         .readpage       = ocfs2_readpage,
         .writepage      = ocfs2_writepage,
         .prepare_write  = ocfs2_prepare_write,
diff --git a/fs/ocfs2/inode.h b/fs/ocfs2/inode.h
index 84c507961287..35140f6cf840 100644
--- a/fs/ocfs2/inode.h
+++ b/fs/ocfs2/inode.h
@@ -114,7 +114,7 @@ static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
 
 extern kmem_cache_t *ocfs2_inode_cache;
 
-extern struct address_space_operations ocfs2_aops;
+extern const struct address_space_operations ocfs2_aops;
 
 struct buffer_head *ocfs2_bread(struct inode *inode, int block,
                                 int *err, int reada);
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index 2f24c46f72a1..8bc182a88748 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -450,7 +450,7 @@ static sector_t qnx4_bmap(struct address_space *mapping, sector_t block)
 {
         return generic_block_bmap(mapping,block,qnx4_get_block);
 }
-static struct address_space_operations qnx4_aops = {
+static const struct address_space_operations qnx4_aops = {
         .readpage       = qnx4_readpage,
         .writepage      = qnx4_writepage,
         .sync_page      = block_sync_page,
diff --git a/fs/ramfs/file-mmu.c b/fs/ramfs/file-mmu.c
index 00a933eb820c..86f14cacf641 100644
--- a/fs/ramfs/file-mmu.c
+++ b/fs/ramfs/file-mmu.c
@@ -26,7 +26,7 @@
 
 #include <linux/fs.h>
 
-struct address_space_operations ramfs_aops = {
+const struct address_space_operations ramfs_aops = {
         .readpage       = simple_readpage,
         .prepare_write  = simple_prepare_write,
         .commit_write   = simple_commit_write
diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index f443a84b98a5..99fffc9e1bfd 100644
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -27,7 +27,7 @@
 
 static int ramfs_nommu_setattr(struct dentry *, struct iattr *);
 
-struct address_space_operations ramfs_aops = {
+const struct address_space_operations ramfs_aops = {
         .readpage               = simple_readpage,
         .prepare_write          = simple_prepare_write,
         .commit_write           = simple_commit_write
diff --git a/fs/ramfs/internal.h b/fs/ramfs/internal.h
index 313237631b49..c2bb58e74653 100644
--- a/fs/ramfs/internal.h
+++ b/fs/ramfs/internal.h
@@ -10,6 +10,6 @@
  */
 
 
-extern struct address_space_operations ramfs_aops;
+extern const struct address_space_operations ramfs_aops;
 extern const struct file_operations ramfs_file_operations;
 extern struct inode_operations ramfs_file_inode_operations;
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 9857e50f85e7..a24858a632fa 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -2996,7 +2996,7 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
         return error;
 }
 
-struct address_space_operations reiserfs_address_space_operations = {
+const struct address_space_operations reiserfs_address_space_operations = {
         .writepage = reiserfs_writepage,
         .readpage = reiserfs_readpage,
         .readpages = reiserfs_readpages,
diff --git a/fs/romfs/inode.c b/fs/romfs/inode.c
index 283fbc6b8eea..22eed61ebf69 100644
--- a/fs/romfs/inode.c
+++ b/fs/romfs/inode.c
@@ -459,7 +459,7 @@ err_out:
 
 /* Mapping from our types to the kernel */
 
-static struct address_space_operations romfs_aops = {
+static const struct address_space_operations romfs_aops = {
         .readpage = romfs_readpage
 };
 
diff --git a/fs/smbfs/file.c b/fs/smbfs/file.c
index ed9a24d19d7d..dae67048baba 100644
--- a/fs/smbfs/file.c
+++ b/fs/smbfs/file.c
@@ -306,7 +306,7 @@ static int smb_commit_write(struct file *file, struct page *page,
         return status;
 }
 
-struct address_space_operations smb_file_aops = {
+const struct address_space_operations smb_file_aops = {
         .readpage = smb_readpage,
         .writepage = smb_writepage,
         .prepare_write = smb_prepare_write,
diff --git a/fs/smbfs/proto.h b/fs/smbfs/proto.h
index 972ed7dad388..34fb462b2379 100644
--- a/fs/smbfs/proto.h
+++ b/fs/smbfs/proto.h
@@ -63,7 +63,7 @@ extern int smb_revalidate_inode(struct dentry *dentry);
 extern int smb_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);
 extern int smb_notify_change(struct dentry *dentry, struct iattr *attr);
 /* file.c */
-extern struct address_space_operations smb_file_aops;
+extern const struct address_space_operations smb_file_aops;
 extern const struct file_operations smb_file_operations;
 extern struct inode_operations smb_file_inode_operations;
 /* ioctl.c */
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index f0b347bd12ca..5e0e31cc46f5 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -16,7 +16,7 @@
 
 extern struct super_block * sysfs_sb;
 
-static struct address_space_operations sysfs_aops = {
+static const struct address_space_operations sysfs_aops = {
         .readpage       = simple_readpage,
         .prepare_write  = simple_prepare_write,
         .commit_write   = simple_commit_write
diff --git a/fs/sysv/itree.c b/fs/sysv/itree.c
index 86f5f8d43d0f..f2bcccd1d6fc 100644
--- a/fs/sysv/itree.c
+++ b/fs/sysv/itree.c
@@ -465,7 +465,7 @@ static sector_t sysv_bmap(struct address_space *mapping, sector_t block)
 {
         return generic_block_bmap(mapping,block,get_block);
 }
-struct address_space_operations sysv_aops = {
+const struct address_space_operations sysv_aops = {
         .readpage = sysv_readpage,
         .writepage = sysv_writepage,
         .sync_page = block_sync_page,
diff --git a/fs/sysv/sysv.h b/fs/sysv/sysv.h
index 393a480e4deb..9dcc82120935 100644
--- a/fs/sysv/sysv.h
+++ b/fs/sysv/sysv.h
@@ -161,7 +161,7 @@ extern struct inode_operations sysv_dir_inode_operations;
 extern struct inode_operations sysv_fast_symlink_inode_operations;
 extern const struct file_operations sysv_file_operations;
 extern const struct file_operations sysv_dir_operations;
-extern struct address_space_operations sysv_aops;
+extern const struct address_space_operations sysv_aops;
 extern struct super_operations sysv_sops;
 extern struct dentry_operations sysv_dentry_operations;
 
diff --git a/fs/udf/file.c b/fs/udf/file.c
index e34b00e303f1..a59e5f33daf6 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -95,7 +95,7 @@ static int udf_adinicb_commit_write(struct file *file, struct page *page, unsign
         return 0;
 }
 
-struct address_space_operations udf_adinicb_aops = {
+const struct address_space_operations udf_adinicb_aops = {
         .readpage               = udf_adinicb_readpage,
         .writepage              = udf_adinicb_writepage,
         .sync_page              = block_sync_page,
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 2983afd5e7fd..605f5111b6d8 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -132,7 +132,7 @@ static sector_t udf_bmap(struct address_space *mapping, sector_t block)
         return generic_block_bmap(mapping,block,udf_get_block);
 }
 
-struct address_space_operations udf_aops = {
+const struct address_space_operations udf_aops = {
         .readpage               = udf_readpage,
         .writepage              = udf_writepage,
         .sync_page              = block_sync_page,
diff --git a/fs/udf/symlink.c b/fs/udf/symlink.c
index 674bb40edc83..ba068a786563 100644
--- a/fs/udf/symlink.c
+++ b/fs/udf/symlink.c
@@ -113,6 +113,6 @@ out:
 /*
  * symlinks can't do much...
  */
-struct address_space_operations udf_symlink_aops = {
+const struct address_space_operations udf_symlink_aops = {
         .readpage               = udf_symlink_filler,
 };
diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h
index 023e19ba5a2e..2f992387cc9e 100644
--- a/fs/udf/udfdecl.h
+++ b/fs/udf/udfdecl.h
@@ -47,9 +47,9 @@ extern struct inode_operations udf_dir_inode_operations;
 extern const struct file_operations udf_dir_operations;
 extern struct inode_operations udf_file_inode_operations;
 extern const struct file_operations udf_file_operations;
-extern struct address_space_operations udf_aops;
-extern struct address_space_operations udf_adinicb_aops;
-extern struct address_space_operations udf_symlink_aops;
+extern const struct address_space_operations udf_aops;
+extern const struct address_space_operations udf_adinicb_aops;
+extern const struct address_space_operations udf_symlink_aops;
 
 struct udf_fileident_bh
 {
diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index 259bd196099d..8e1f90e42040 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -574,7 +574,7 @@ static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
 {
         return generic_block_bmap(mapping,block,ufs_getfrag_block);
 }
-struct address_space_operations ufs_aops = {
+const struct address_space_operations ufs_aops = {
         .readpage = ufs_readpage,
         .writepage = ufs_writepage,
         .sync_page = block_sync_page,
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index 3e807b828e22..c40f81ba9b13 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -1454,7 +1454,7 @@ xfs_vm_invalidatepage(
         block_invalidatepage(page, offset);
 }
 
-struct address_space_operations xfs_address_space_operations = {
+const struct address_space_operations xfs_address_space_operations = {
         .readpage               = xfs_vm_readpage,
         .readpages              = xfs_vm_readpages,
         .writepage              = xfs_vm_writepage,
diff --git a/fs/xfs/linux-2.6/xfs_aops.h b/fs/xfs/linux-2.6/xfs_aops.h
index 706d8c781b8a..2244e516b66a 100644
--- a/fs/xfs/linux-2.6/xfs_aops.h
+++ b/fs/xfs/linux-2.6/xfs_aops.h
@@ -40,7 +40,7 @@ typedef struct xfs_ioend {
         struct work_struct      io_work;        /* xfsdatad work queue */
 } xfs_ioend_t;
 
-extern struct address_space_operations xfs_address_space_operations;
+extern const struct address_space_operations xfs_address_space_operations;
 extern int xfs_get_blocks(struct inode *, sector_t, struct buffer_head *, int);
 
 #endif /* __XFS_AOPS_H__ */
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index 26fed0756f01..2af528dcfb04 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -1520,7 +1520,7 @@ xfs_mapping_buftarg(
         struct backing_dev_info *bdi;
         struct inode            *inode;
         struct address_space    *mapping;
-        static struct address_space_operations mapping_aops = {
+        static const struct address_space_operations mapping_aops = {
                 .sync_page = block_sync_page,
                 .migratepage = fail_migrate_page,
         };
diff --git a/include/linux/coda_linux.h b/include/linux/coda_linux.h
index 7b5c5df5cb69..be512cc98791 100644
--- a/include/linux/coda_linux.h
+++ b/include/linux/coda_linux.h
@@ -27,8 +27,8 @@ extern struct inode_operations coda_dir_inode_operations;
 extern struct inode_operations coda_file_inode_operations;
 extern struct inode_operations coda_ioctl_inode_operations;
 
-extern struct address_space_operations coda_file_aops;
-extern struct address_space_operations coda_symlink_aops;
+extern const struct address_space_operations coda_file_aops;
+extern const struct address_space_operations coda_symlink_aops;
 
 extern const struct file_operations coda_dir_operations;
 extern const struct file_operations coda_file_operations;
diff --git a/include/linux/efs_fs.h b/include/linux/efs_fs.h
index fbfa6b52e2fb..278ef4495819 100644
--- a/include/linux/efs_fs.h
+++ b/include/linux/efs_fs.h
@@ -38,7 +38,7 @@ struct statfs;
 
 extern struct inode_operations efs_dir_inode_operations;
 extern const struct file_operations efs_dir_operations;
-extern struct address_space_operations efs_symlink_aops;
+extern const struct address_space_operations efs_symlink_aops;
 
 extern void efs_read_inode(struct inode *);
 extern efs_block_t efs_map_block(struct inode *, efs_block_t);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 2d8b348c1192..e04a5cfe874f 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -392,7 +392,7 @@ struct address_space {
         unsigned int            truncate_count; /* Cover race condition with truncate */
         unsigned long           nrpages;        /* number of total pages */
         pgoff_t                 writeback_index;/* writeback starts here */
-        struct address_space_operations *a_ops; /* methods */
+        const struct address_space_operations *a_ops;   /* methods */
         unsigned long           flags;          /* error bits/gfp mask */
         struct backing_dev_info *backing_dev_info; /* device readahead, etc */
         spinlock_t              private_lock;   /* for use by the address_space */
@@ -1405,7 +1405,7 @@ extern void bd_forget(struct inode *inode);
 extern void bdput(struct block_device *);
 extern struct block_device *open_by_devnum(dev_t, unsigned);
 extern const struct file_operations def_blk_fops;
-extern struct address_space_operations def_blk_aops;
+extern const struct address_space_operations def_blk_aops;
 extern const struct file_operations def_chr_fops;
 extern const struct file_operations bad_sock_fops;
 extern const struct file_operations def_fifo_fops;
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 0a1740b2532e..d90b1bb37563 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -335,7 +335,7 @@ extern struct inode_operations nfs_file_inode_operations;
 extern struct inode_operations nfs3_file_inode_operations;
 #endif /* CONFIG_NFS_V3 */
 extern const struct file_operations nfs_file_operations;
-extern struct address_space_operations nfs_file_aops;
+extern const struct address_space_operations nfs_file_aops;
 
 static inline struct rpc_cred *nfs_file_cred(struct file *file)
 {
diff --git a/include/linux/reiserfs_fs.h b/include/linux/reiserfs_fs.h
index 5676c4210e2c..daa2d83cefe8 100644
--- a/include/linux/reiserfs_fs.h
+++ b/include/linux/reiserfs_fs.h
@@ -1973,7 +1973,7 @@ void reiserfs_unmap_buffer(struct buffer_head *);
 /* file.c */
 extern struct inode_operations reiserfs_file_inode_operations;
 extern const struct file_operations reiserfs_file_operations;
-extern struct address_space_operations reiserfs_address_space_operations;
+extern const struct address_space_operations reiserfs_address_space_operations;
 
 /* fix_nodes.c */
 
diff --git a/include/linux/ufs_fs.h b/include/linux/ufs_fs.h
index 914f911325be..e39b7cc43390 100644
--- a/include/linux/ufs_fs.h
+++ b/include/linux/ufs_fs.h
@@ -966,7 +966,7 @@ extern void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
 extern struct inode_operations ufs_file_inode_operations;
 extern const struct file_operations ufs_file_operations;
 
-extern struct address_space_operations ufs_aops;
+extern const struct address_space_operations ufs_aops;
 
 /* ialloc.c */
 extern void ufs_free_inode (struct inode *inode);
diff --git a/mm/filemap.c b/mm/filemap.c
index d504d6e98886..4082b3b3cea7 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2069,7 +2069,7 @@ generic_file_buffered_write(struct kiocb *iocb, const struct iovec *iov,
 {
         struct file *file = iocb->ki_filp;
         struct address_space * mapping = file->f_mapping;
-        struct address_space_operations *a_ops = mapping->a_ops;
+        const struct address_space_operations *a_ops = mapping->a_ops;
         struct inode    *inode = mapping->host;
         long            status = 0;
         struct page     *page;
@@ -2219,7 +2219,7 @@ __generic_file_aio_write_nolock(struct kiocb *iocb, const struct iovec *iov,
                                 unsigned long nr_segs, loff_t *ppos)
 {
         struct file *file = iocb->ki_filp;
-        struct address_space * mapping = file->f_mapping;
+        const struct address_space * mapping = file->f_mapping;
         size_t ocount;          /* original count */
         size_t count;           /* after file limit checks */
         struct inode    *inode = mapping->host;
diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c
index b960ac8e5918..b4fd0d7c9bfb 100644
--- a/mm/filemap_xip.c
+++ b/mm/filemap_xip.c
@@ -273,7 +273,7 @@ __xip_file_write(struct file *filp, const char __user *buf,
                   size_t count, loff_t pos, loff_t *ppos)
 {
         struct address_space * mapping = filp->f_mapping;
-        struct address_space_operations *a_ops = mapping->a_ops;
+        const struct address_space_operations *a_ops = mapping->a_ops;
         struct inode    *inode = mapping->host;
         long            status = 0;
         struct page     *page;
diff --git a/mm/shmem.c b/mm/shmem.c
index 38bc3334f263..ea64c07cbe72 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -174,7 +174,7 @@ static inline void shmem_unacct_blocks(unsigned long flags, long pages)
 }
 
 static struct super_operations shmem_ops;
-static struct address_space_operations shmem_aops;
+static const struct address_space_operations shmem_aops;
 static struct file_operations shmem_file_operations;
 static struct inode_operations shmem_inode_operations;
 static struct inode_operations shmem_dir_inode_operations;
@@ -2162,7 +2162,7 @@ static void destroy_inodecache(void)
                 printk(KERN_INFO "shmem_inode_cache: not all structures were freed\n");
 }
 
-static struct address_space_operations shmem_aops = {
+static const struct address_space_operations shmem_aops = {
         .writepage      = shmem_writepage,
         .set_page_dirty = __set_page_dirty_nobuffers,
 #ifdef CONFIG_TMPFS
diff --git a/mm/swap_state.c b/mm/swap_state.c
index e0e1583f32c2..7535211bb495 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -24,7 +24,7 @@
  * vmscan's shrink_list, to make sync_page look nicer, and to allow
  * future use of radix_tree tags in the swap cache.
  */
-static struct address_space_operations swap_aops = {
+static const struct address_space_operations swap_aops = {
         .writepage      = swap_writepage,
         .sync_page      = block_sync_page,
         .set_page_dirty = __set_page_dirty_nobuffers,