597 #define	QMD_TAILQ_CHECK_TAIL(head, headname)  argument
637 #define	TAILQ_FOREACH_REVERSE(var, head, headname, field)		\  argument
638 	for ((var) = TAILQ_LAST((head), headname);			\
640 	    (var) = TAILQ_PREV((var), headname, field))
642 #define	TAILQ_FOREACH_REVERSE_FROM(var, head, headname, field)		\  argument
643 	for ((var) = ((var) ? (var) : TAILQ_LAST((head), headname));	\
645 	    (var) = TAILQ_PREV((var), headname, field))
647 #define	TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, tvar)	\  argument
648 	for ((var) = TAILQ_LAST((head), headname);			\
649 	    (var) && ((tvar) = TAILQ_PREV((var), headname, field), 1);	\
652 #define	TAILQ_FOREACH_REVERSE_FROM_SAFE(var, head, headname, field, tvar) \  argument
653 	for ((var) = ((var) ? (var) : TAILQ_LAST((head), headname));	\
654 	    (var) && ((tvar) = TAILQ_PREV((var), headname, field), 1);	\
711 #define	TAILQ_LAST(head, headname)					\  argument
712 	(*(((struct headname *)((head)->tqh_last))->tqh_last))
716 #define	TAILQ_PREV(elm, headname, field)				\  argument
717 	(*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))