diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 3c74ea7..18dd026 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -210,7 +210,7 @@
 {
 	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 @@
 
 	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 940bfd7..0378da04 100644
--- a/drivers/block/rd.c
+++ b/drivers/block/rd.c
@@ -191,7 +191,7 @@
 	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 f867b8d..450b0c1 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 efda46f..d4f0aa3 100644
--- a/fs/9p/vfs_addr.c
+++ b/fs/9p/vfs_addr.c
@@ -103,6 +103,6 @@
 	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 a02802a..534f3ee 100644
--- a/fs/adfs/inode.c
+++ b/fs/adfs/inode.c
@@ -72,7 +72,7 @@
 	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 a43a876..0ddd4cc 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -195,9 +195,9 @@
 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 7076262..3de8590 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -406,7 +406,7 @@
 {
 	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 @@
 	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 426f0f0..f802256 100644
--- a/fs/affs/symlink.c
+++ b/fs/affs/symlink.c
@@ -66,7 +66,7 @@
 	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 7bb7168..67d6634 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -35,7 +35,7 @@
 	.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 72febdf..e88b3b6 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -69,7 +69,7 @@
 /*
  * 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 08201fa..a83e889 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -73,7 +73,7 @@
 	.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 9d79100..31973bb 100644
--- a/fs/bfs/bfs.h
+++ b/fs/bfs/bfs.h
@@ -50,7 +50,7 @@
 /* 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 d83cd74..3d5aca2 100644
--- a/fs/bfs/file.c
+++ b/fs/bfs/file.c
@@ -153,7 +153,7 @@
 	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 028d9fb..7f7600e 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1095,7 +1095,7 @@
 	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 f23bb64..e999472 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2598,7 +2598,7 @@
 	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 a6384d8..8f75c6f 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 e9c1573..5861eb4 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1942,7 +1942,7 @@
 	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 @@
  * 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 b35e5bb..76e00a6 100644
--- a/fs/coda/symlink.c
+++ b/fs/coda/symlink.c
@@ -50,6 +50,6 @@
 	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 c153bd9..e14488c 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 c45d738..223c043 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 @@
 	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 180607f..174696f 100644
--- a/fs/efs/inode.c
+++ b/fs/efs/inode.c
@@ -21,7 +21,7 @@
 {
 	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 3d9a350..e249cf7 100644
--- a/fs/efs/symlink.c
+++ b/fs/efs/symlink.c
@@ -53,6 +53,6 @@
 	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 9f74a62..e65a019 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -162,9 +162,9 @@
 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 04af9c4..fb4d322 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -684,7 +684,7 @@
 	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 @@
 	.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 0321e1b..f804d5e 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1698,7 +1698,7 @@
 	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 @@
 	.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 @@
 	.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 7c35d58..31b7174 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -196,7 +196,7 @@
 	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 6f5df17..4e25f3f 100644
--- a/fs/freevxfs/vxfs_immed.c
+++ b/fs/freevxfs/vxfs_immed.c
@@ -56,7 +56,7 @@
 /*
  * 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 f544aae..ca6a397 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 @@
 {
 	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 c1be118..decac62 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 28aa81e..63614ed 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -770,7 +770,7 @@
 	/* 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 3ed8663..735332d 100644
--- a/fs/hfs/hfs_fs.h
+++ b/fs/hfs/hfs_fs.h
@@ -182,8 +182,8 @@
 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 2d4ced2..315cf44 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -114,7 +114,7 @@
 	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 @@
 	.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 7ae3936..8a1ca5e 100644
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/fs/hfsplus/hfsplus_fs.h
@@ -323,8 +323,8 @@
 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 acf66db..924ecde 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -109,7 +109,7 @@
 	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 @@
 	.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 8e0d377..b82e3d9 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -54,7 +54,7 @@
 
 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 @@
 	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 @@
 	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 d3b9fff..d9eb19b 100644
--- a/fs/hpfs/file.c
+++ b/fs/hpfs/file.c
@@ -99,7 +99,7 @@
 {
 	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 29b7a3e..f687d54 100644
--- a/fs/hpfs/hpfs_fn.h
+++ b/fs/hpfs/hpfs_fn.h
@@ -268,7 +268,7 @@
 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 @@
 /* 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 a03abb1..59e7dc1 100644
--- a/fs/hpfs/namei.c
+++ b/fs/hpfs/namei.c
@@ -538,7 +538,7 @@
 	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 e6410d8..6449cb6 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 @@
 	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 3a2446a..f42961e 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -102,7 +102,7 @@
 
 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 4917315..3a39158 100644
--- a/fs/isofs/compress.c
+++ b/fs/isofs/compress.c
@@ -312,7 +312,7 @@
 	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 3f9c8ba..bb11c7f 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -1054,7 +1054,7 @@
 	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 b87ba06..e6308c8 100644
--- a/fs/isofs/isofs.h
+++ b/fs/isofs/isofs.h
@@ -176,5 +176,5 @@
 
 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 4326cb4..f3a1db3 100644
--- a/fs/isofs/rock.c
+++ b/fs/isofs/rock.c
@@ -754,6 +754,6 @@
 	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 d78485d..2737957 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 9e46ea6..9306869 100644
--- a/fs/jffs/inode-v23.c
+++ b/fs/jffs/inode-v23.c
@@ -59,7 +59,7 @@
 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()  */
 
 
-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 bb8844f..3ed6e3e 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -62,7 +62,7 @@
 	.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 6b52235..9f41fc0 100644
--- a/fs/jffs2/os-linux.h
+++ b/fs/jffs2/os-linux.h
@@ -158,7 +158,7 @@
 /* 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 04eb78f..43e3f56 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -305,7 +305,7 @@
 				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 c300726..b5c7da6 100644
--- a/fs/jfs/jfs_inode.h
+++ b/fs/jfs/jfs_inode.h
@@ -33,7 +33,7 @@
 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 7f6e880..e1e0a6e 100644
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -577,7 +577,7 @@
 	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 f0b7d32..d17a329 100644
--- a/fs/jfs/jfs_metapage.h
+++ b/fs/jfs/jfs_metapage.h
@@ -139,7 +139,7 @@
 	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 a6fb509..9ea91c5 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -335,7 +335,7 @@
 {
 	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 90d2ea2..6c51c11 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -105,7 +105,7 @@
 
 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 e935f1b..f76b139 100644
--- a/fs/ncpfs/symlink.c
+++ b/fs/ncpfs/symlink.c
@@ -99,7 +99,7 @@
 /*
  * 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 add2891..cc2b874 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -315,7 +315,7 @@
 	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 580412d..bc579bf 100644
--- a/fs/ntfs/aops.c
+++ b/fs/ntfs/aops.c
@@ -1544,7 +1544,7 @@
 /**
  * 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 @@
  * 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 bf7b3d7..ddd3d50 100644
--- a/fs/ntfs/ntfs.h
+++ b/fs/ntfs/ntfs.h
@@ -57,8 +57,8 @@
 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 47152bf..cca7131 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -666,7 +666,7 @@
 	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 84c5079..35140f6 100644
--- a/fs/ocfs2/inode.h
+++ b/fs/ocfs2/inode.h
@@ -114,7 +114,7 @@
 
 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 2f24c46..8bc182a 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -450,7 +450,7 @@
 {
 	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 00a933e..86f14ca 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 f443a84..99fffc9 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 3132376..c2bb58e 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 9857e50..a24858a 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -2996,7 +2996,7 @@
 	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 283fbc6..22eed61 100644
--- a/fs/romfs/inode.c
+++ b/fs/romfs/inode.c
@@ -459,7 +459,7 @@
 
 /* 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 ed9a24d..dae6704 100644
--- a/fs/smbfs/file.c
+++ b/fs/smbfs/file.c
@@ -306,7 +306,7 @@
 	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 972ed7d..34fb462 100644
--- a/fs/smbfs/proto.h
+++ b/fs/smbfs/proto.h
@@ -63,7 +63,7 @@
 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 f0b347b..5e0e31c 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 86f5f8d..f2bcccd 100644
--- a/fs/sysv/itree.c
+++ b/fs/sysv/itree.c
@@ -465,7 +465,7 @@
 {
 	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 393a480..9dcc821 100644
--- a/fs/sysv/sysv.h
+++ b/fs/sysv/sysv.h
@@ -161,7 +161,7 @@
 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 e34b00e..a59e5f3 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -95,7 +95,7 @@
 	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 2983afd..605f511 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -132,7 +132,7 @@
 	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 674bb40..ba068a7 100644
--- a/fs/udf/symlink.c
+++ b/fs/udf/symlink.c
@@ -113,6 +113,6 @@
 /*
  * 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 023e19b..2f99238 100644
--- a/fs/udf/udfdecl.h
+++ b/fs/udf/udfdecl.h
@@ -47,9 +47,9 @@
 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 259bd19..8e1f90e 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -574,7 +574,7 @@
 {
 	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 3e807b8..c40f81b 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -1454,7 +1454,7 @@
 	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 706d8c7..2244e51 100644
--- a/fs/xfs/linux-2.6/xfs_aops.h
+++ b/fs/xfs/linux-2.6/xfs_aops.h
@@ -40,7 +40,7 @@
 	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 26fed07..2af528d 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -1520,7 +1520,7 @@
 	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 7b5c5df..be512cc 100644
--- a/include/linux/coda_linux.h
+++ b/include/linux/coda_linux.h
@@ -27,8 +27,8 @@
 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 fbfa6b5..278ef44 100644
--- a/include/linux/efs_fs.h
+++ b/include/linux/efs_fs.h
@@ -38,7 +38,7 @@
 
 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 2d8b348..e04a5cf 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -392,7 +392,7 @@
 	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 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 0a1740b..d90b1bb 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -335,7 +335,7 @@
 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 5676c42..daa2d83 100644
--- a/include/linux/reiserfs_fs.h
+++ b/include/linux/reiserfs_fs.h
@@ -1973,7 +1973,7 @@
 /* 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 914f911..e39b7cc 100644
--- a/include/linux/ufs_fs.h
+++ b/include/linux/ufs_fs.h
@@ -966,7 +966,7 @@
 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 d504d6e..4082b3b 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2069,7 +2069,7 @@
 {
 	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 @@
 				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 b960ac8..b4fd0d7 100644
--- a/mm/filemap_xip.c
+++ b/mm/filemap_xip.c
@@ -273,7 +273,7 @@
 		  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 38bc333..ea64c07 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -174,7 +174,7 @@
 }
 
 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 @@
 		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 e0e1583..7535211 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,