slab: unsigned slabp->inuse cannot be less than 0

unsigned slabp->inuse cannot be less than 0

Acked-by: Christoph Lameter <cl@linux-foundation.org
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi>

mm/slab.c

@@ -2997,7 +2997,7 @@ static void *cache_alloc_refill(struct kmem_cache *cachep, gfp_t flags)
 		 * there must be at least one object available for
 		 * allocation.
 		 */
-		BUG_ON(slabp->inuse < 0 || slabp->inuse >= cachep->num);
+		BUG_ON(slabp->inuse >= cachep->num);
 
 		while (slabp->inuse < cachep->num && batchcount--) {
 			STATS_INC_ALLOCED(cachep);