275 #define SLIST_FOREACH_SAFE(var, head, field, tvar)                      \  argument
277 	    (var) && ((tvar) = SLIST_NEXT((var), field), 1);            \
278 	    (var) = (tvar))
374 #define STAILQ_FOREACH_SAFE(var, head, field, tvar)                     \  argument
376 	    (var) && ((tvar) = STAILQ_NEXT((var), field), 1);           \
377 	    (var) = (tvar))
533 #define LIST_FOREACH_SAFE(var, head, field, tvar)                       \  argument
535 	    (var) && ((tvar) = LIST_NEXT((var), field), 1);             \
536 	    (var) = (tvar))
673 #define TAILQ_FOREACH_SAFE(var, head, field, tvar)                      \  argument
675 	    (var) && ((tvar) = TAILQ_NEXT((var), field), 1);            \
676 	    (var) = (tvar))
683 #define TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, tvar)    \  argument
685 	    (var) && ((tvar) = TAILQ_PREV((var), headname, field), 1);  \
686 	    (var) = (tvar))