#define CONFIGFS_NOT_PINNED (CONFIGFS_ITEM_ATTR)
extern struct vfsmount * configfs_mount;
-extern kmem_cache_t *configfs_dir_cachep;
+extern struct kmem_cache *configfs_dir_cachep;
extern int configfs_is_root(struct config_item *item);
extern struct rw_semaphore configfs_rename_sem;
extern struct super_block * configfs_sb;
-extern struct file_operations configfs_dir_operations;
-extern struct file_operations configfs_file_operations;
-extern struct file_operations bin_fops;
+extern const struct file_operations configfs_dir_operations;
+extern const struct file_operations configfs_file_operations;
+extern const struct file_operations bin_fops;
extern struct inode_operations configfs_dir_inode_operations;
extern struct inode_operations configfs_symlink_inode_operations;