Index: linux-2.6.21-rc6/mm/slub.c
===================================================================
--- linux-2.6.21-rc6.orig/mm/slub.c	2007-04-12 09:38:45.000000000 -0700
+++ linux-2.6.21-rc6/mm/slub.c	2007-04-12 09:39:05.000000000 -0700
@@ -1822,9 +1822,8 @@ static int kmem_cache_close(struct kmem_
 void kmem_cache_destroy(struct kmem_cache *s)
 {
 	down_write(&slub_lock);
-	if (s->refcount)
-		s->refcount--;
-	else {
+	s->refcount--;
+	if (!s->refcount) {
 		list_del(&s->list);
 		if (kmem_cache_close(s))
 			WARN_ON(1);