slab: use NUMA_NO_NODE

Use the nice enumerated constant.

Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NPekka Enberg <penberg@kernel.org>

mm/slab.c

@@ -3403,7 +3403,7 @@ __cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid,
 	cache_alloc_debugcheck_before(cachep, flags);
 	local_irq_save(save_flags);
 
-	if (nodeid == -1)
+	if (nodeid == NUMA_NO_NODE)
 		nodeid = slab_node;
 
 	if (unlikely(!cachep->nodelists[nodeid])) {