diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 8b81927..6c41731 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -772,7 +772,7 @@
 	}
 }
 
-static struct address_space_operations btree_aops = {
+static const struct address_space_operations btree_aops = {
 	.readpage	= btree_readpage,
 	.writepage	= btree_writepage,
 	.writepages	= btree_writepages,
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 59cba18..3e4d679 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -60,8 +60,8 @@
 static struct inode_operations btrfs_dir_ro_inode_operations;
 static struct inode_operations btrfs_special_inode_operations;
 static struct inode_operations btrfs_file_inode_operations;
-static struct address_space_operations btrfs_aops;
-static struct address_space_operations btrfs_symlink_aops;
+static const struct address_space_operations btrfs_aops;
+static const struct address_space_operations btrfs_symlink_aops;
 static struct file_operations btrfs_dir_file_operations;
 static struct extent_io_ops btrfs_extent_io_ops;
 
@@ -5259,7 +5259,7 @@
  *
  * For now we're avoiding this by dropping bmap.
  */
-static struct address_space_operations btrfs_aops = {
+static const struct address_space_operations btrfs_aops = {
 	.readpage	= btrfs_readpage,
 	.writepage	= btrfs_writepage,
 	.writepages	= btrfs_writepages,
@@ -5271,7 +5271,7 @@
 	.set_page_dirty	= btrfs_set_page_dirty,
 };
 
-static struct address_space_operations btrfs_symlink_aops = {
+static const struct address_space_operations btrfs_symlink_aops = {
 	.readpage	= btrfs_readpage,
 	.writepage	= btrfs_writepage,
 	.invalidatepage = btrfs_invalidatepage,
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index 00b30a2..542f625 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -582,7 +582,7 @@
 extern const struct inode_operations ecryptfs_symlink_iops;
 extern const struct super_operations ecryptfs_sops;
 extern const struct dentry_operations ecryptfs_dops;
-extern struct address_space_operations ecryptfs_aops;
+extern const struct address_space_operations ecryptfs_aops;
 extern int ecryptfs_verbosity;
 extern unsigned int ecryptfs_message_buf_len;
 extern signed long ecryptfs_message_wait_timeout;
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 5c6bab9..05772ae 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -545,7 +545,7 @@
 	return rc;
 }
 
-struct address_space_operations ecryptfs_aops = {
+const struct address_space_operations ecryptfs_aops = {
 	.writepage = ecryptfs_writepage,
 	.readpage = ecryptfs_readpage,
 	.write_begin = ecryptfs_write_begin,
diff --git a/fs/nilfs2/btnode.c b/fs/nilfs2/btnode.c
index c668bca..6a2711f 100644
--- a/fs/nilfs2/btnode.c
+++ b/fs/nilfs2/btnode.c
@@ -46,7 +46,7 @@
 	INIT_LIST_HEAD(&btnc->i_mmap_nonlinear);
 }
 
-static struct address_space_operations def_btnode_aops = {
+static const struct address_space_operations def_btnode_aops = {
 	.sync_page		= block_sync_page,
 };
 
diff --git a/fs/nilfs2/gcinode.c b/fs/nilfs2/gcinode.c
index 1b3c2bb..e6de0a2 100644
--- a/fs/nilfs2/gcinode.c
+++ b/fs/nilfs2/gcinode.c
@@ -52,7 +52,7 @@
 #include "dat.h"
 #include "ifile.h"
 
-static struct address_space_operations def_gcinode_aops = {
+static const struct address_space_operations def_gcinode_aops = {
 	.sync_page		= block_sync_page,
 };
 
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 807e584..2d2c501 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -238,7 +238,7 @@
 	return size;
 }
 
-struct address_space_operations nilfs_aops = {
+const struct address_space_operations nilfs_aops = {
 	.writepage		= nilfs_writepage,
 	.readpage		= nilfs_readpage,
 	.sync_page		= block_sync_page,
diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
index 156bf60..680e86c 100644
--- a/fs/nilfs2/mdt.c
+++ b/fs/nilfs2/mdt.c
@@ -427,7 +427,7 @@
 }
 
 
-static struct address_space_operations def_mdt_aops = {
+static const struct address_space_operations def_mdt_aops = {
 	.writepage		= nilfs_mdt_write_page,
 	.sync_page		= block_sync_page,
 };
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index 724c637..c0cf52a 100644
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -297,7 +297,7 @@
 extern struct file_operations nilfs_dir_operations;
 extern struct inode_operations nilfs_file_inode_operations;
 extern struct file_operations nilfs_file_operations;
-extern struct address_space_operations nilfs_aops;
+extern const struct address_space_operations nilfs_aops;
 extern struct inode_operations nilfs_dir_inode_operations;
 extern struct inode_operations nilfs_special_inode_operations;
 extern struct inode_operations nilfs_symlink_inode_operations;
diff --git a/fs/omfs/file.c b/fs/omfs/file.c
index d17e774..b707fa5 100644
--- a/fs/omfs/file.c
+++ b/fs/omfs/file.c
@@ -337,7 +337,7 @@
 	.truncate = omfs_truncate
 };
 
-struct address_space_operations omfs_aops = {
+const struct address_space_operations omfs_aops = {
 	.readpage = omfs_readpage,
 	.readpages = omfs_readpages,
 	.writepage = omfs_writepage,
diff --git a/fs/omfs/omfs.h b/fs/omfs/omfs.h
index 2bc0f06..16d72ab 100644
--- a/fs/omfs/omfs.h
+++ b/fs/omfs/omfs.h
@@ -53,7 +53,7 @@
 /* file.c */
 extern struct file_operations omfs_file_operations;
 extern struct inode_operations omfs_file_inops;
-extern struct address_space_operations omfs_aops;
+extern const struct address_space_operations omfs_aops;
 extern void omfs_make_empty_table(struct buffer_head *bh, int offset);
 extern int omfs_shrink_inode(struct inode *inode);
 
diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c
index 7998cc3..195830f 100644
--- a/fs/ubifs/xattr.c
+++ b/fs/ubifs/xattr.c
@@ -79,7 +79,7 @@
 };
 
 static const struct inode_operations none_inode_operations;
-static struct address_space_operations none_address_operations;
+static const struct address_space_operations none_address_operations;
 static const struct file_operations none_file_operations;
 
 /**