D12662.id33999.diff
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	Index: sys/kern/subr_unit.c
	===================================================================
	--- sys/kern/subr_unit.c
	+++ sys/kern/subr_unit.c
	@@ -373,18 +373,17 @@

	KASSERT(TAILQ_EMPTY(&uh->ppfree),
	("unrhdr has postponed item for free"));
	- up = TAILQ_FIRST(&uh->head);
	- while (up != NULL) {
	- uq = TAILQ_NEXT(up, list);
	+ TAILQ_FOREACH_SAFE(up, &uh->head, list, uq) {
	if (up->ptr != uh) {
	Free(up->ptr);
	}
	Free(up);
	- up = uq;
	}
	- TAILQ_INIT(&uh->head);
	uh->busy = 0;
	uh->alloc = 0;
	+ init_unrhdr(uh, uh->low, uh->high, uh->mtx);
	+
	+ check_unrhdr(uh, __LINE__);
	}

	static __inline int