*/
/* dir.c */
-extern struct file_operations ext2_dir_operations;
+extern const struct file_operations ext2_dir_operations;
/* file.c */
extern struct inode_operations ext2_file_inode_operations;
-extern struct file_operations ext2_file_operations;
-extern struct file_operations ext2_xip_file_operations;
+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;