670 #define	QMD_TAILQ_CHECK_TAIL(head, headname)  argument
710 #define	TAILQ_FOREACH_REVERSE(var, head, headname, field)		\  argument
711 	for ((var) = TAILQ_LAST((head), headname);			\
713 	    (var) = TAILQ_PREV((var), headname, field))
715 #define	TAILQ_FOREACH_REVERSE_FROM(var, head, headname, field)		\  argument
716 	for ((var) = ((var) ? (var) : TAILQ_LAST((head), headname));	\
718 	    (var) = TAILQ_PREV((var), headname, field))
720 #define	TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, tvar)	\  argument
721 	for ((var) = TAILQ_LAST((head), headname);			\
722 	    (var) && ((tvar) = TAILQ_PREV((var), headname, field), 1);	\
725 #define	TAILQ_FOREACH_REVERSE_FROM_SAFE(var, head, headname, field, tvar) \  argument
726 	for ((var) = ((var) ? (var) : TAILQ_LAST((head), headname));	\
727 	    (var) && ((tvar) = TAILQ_PREV((var), headname, field), 1);	\
784 #define	TAILQ_LAST(head, headname)					\  argument
785 	(*(((struct headname *)((head)->tqh_last))->tqh_last))
799 #define	TAILQ_PREV(elm, headname, field)				\  argument
800 	(*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))