630 #define	QMD_TAILQ_CHECK_TAIL(head, headname)  argument
670 #define	TAILQ_FOREACH_REVERSE(var, head, headname, field)		\  argument
671 	for ((var) = TAILQ_LAST((head), headname);			\
673 	    (var) = TAILQ_PREV((var), headname, field))
675 #define	TAILQ_FOREACH_REVERSE_FROM(var, head, headname, field)		\  argument
676 	for ((var) = ((var) ? (var) : TAILQ_LAST((head), headname));	\
678 	    (var) = TAILQ_PREV((var), headname, field))
680 #define	TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, tvar)	\  argument
681 	for ((var) = TAILQ_LAST((head), headname);			\
682 	    (var) && ((tvar) = TAILQ_PREV((var), headname, field), 1);	\
685 #define	TAILQ_FOREACH_REVERSE_FROM_SAFE(var, head, headname, field, tvar) \  argument
686 	for ((var) = ((var) ? (var) : TAILQ_LAST((head), headname));	\
687 	    (var) && ((tvar) = TAILQ_PREV((var), headname, field), 1);	\
744 #define	TAILQ_LAST(head, headname)					\  argument
745 	(*(((struct headname *)((head)->tqh_last))->tqh_last))
749 #define	TAILQ_PREV(elm, headname, field)				\  argument
750 	(*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))