678 			       void (*func)(void *elem, unsigned long opaque,  in __btree_for_each()  argument
702 static void empty(void *elem, unsigned long opaque, unsigned long *key,  in empty()  argument
707 void visitorl(void *elem, unsigned long opaque, unsigned long *key,  in visitorl()  argument
712 	func(elem, opaque, *key, index);  in visitorl()
716 void visitor32(void *elem, unsigned long opaque, unsigned long *__key,  in visitor32()  argument
722 	func(elem, opaque, *key, index);  in visitor32()
726 void visitor64(void *elem, unsigned long opaque, unsigned long *__key,  in visitor64()  argument
732 	func(elem, opaque, *key, index);  in visitor64()
736 void visitor128(void *elem, unsigned long opaque, unsigned long *__key,  in visitor128()  argument
742 	func(elem, opaque, key[0], key[1], index);  in visitor128()
748 		     void (*func)(void *elem, unsigned long opaque,  in btree_visitor()  argument
766 			  void (*func)(void *elem, unsigned long opaque,  in btree_grim_visitor()  argument