const: mark remaining address_space_operations const

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/omfs/omfs.h

@@ -53,7 +53,7 @@ extern int omfs_is_bad(struct omfs_sb_info *sbi, struct omfs_header *header,
 /* 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);