D50131.diff
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	diff --git a/sys/sys/queue.h b/sys/sys/queue.h
	--- a/sys/sys/queue.h
	+++ b/sys/sys/queue.h
	@@ -564,6 +564,21 @@
	(head2)->stqh_last = &STAILQ_FIRST(head2); \
	} while (0)

	+#define STAILQ_REVERSE(head, type, field) do { \
	+ if (STAILQ_EMPTY(head)) \
	+ break; \
	+ QUEUE_TYPEOF(type) _Var, _Varp, *_Varn; \
	+ for (_Var = STAILQ_FIRST(head), _Varp = NULL; \
	+ _Var != NULL;) { \
	+ _Varn = STAILQ_NEXT(_Var, field); \
	+ STAILQ_NEXT(_Var, field) = _Varp; \
	+ _Varp = _Var; \
	+ _Var = _Varn; \
	+ } \
	+ (head)->stqh_last = &STAILQ_NEXT(STAILQ_FIRST(head), field); \
	+ (head)->stqh_first = _Varp; \
	+} while (0)
	+
	#define STAILQ_END(head) NULL