Index: linux-2.6.21-rc1/mm/slub.c
===================================================================
--- linux-2.6.21-rc1.orig/mm/slub.c	2007-02-28 07:30:06.000000000 -0800
+++ linux-2.6.21-rc1/mm/slub.c	2007-02-28 07:55:22.000000000 -0800
@@ -1772,24 +1772,16 @@ void __init kmem_cache_init(void)
 static struct kmem_cache *kmem_cache_dup(struct kmem_cache *s,
 				gfp_t flags, const char *name)
 {
-	char *x;
-
 	atomic_inc(&s->refcount);
-#if 0
 	down_write(&slabstat_sem);
 	if (!s->aliases)
 		s->aliases = kstrdup(name, flags);
 	else {
-		x = kmalloc(strlen(s->aliases) + strlen(name) + 1,
-						flags);
-		strcpy(x, s->aliases);
-		strcat(x, " ");
-		strcat(x, name);
-		kfree(s->aliases);
-		s->aliases = x;
+		char *x = s->aliases;
+		s->aliases = kasprintf(flags, "%s/%s", s->aliases, name);
+		kfree(x);
 	}
 	up_write(&slabstat_sem);
-#endif
 	return s;
 }