mm/sl[aou]b: Move kmem_cache refcounting to common code

Get rid of the refcount stuff in the allocators and do that part of
kmem_cache management in the common code.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

mm/slab.c

@@ -2555,7 +2555,6 @@ __kmem_cache_create (struct kmem_cache *cachep, unsigned long flags)
 		 */
 		BUG_ON(ZERO_OR_NULL_PTR(cachep->slabp_cache));
 	}
-	cachep->refcount = 1;
 
 	err = setup_cpu_cache(cachep, gfp);
 	if (err) {

mm/slab_common.c

@@ -125,11 +125,12 @@ struct kmem_cache *kmem_cache_create(const char *name, size_t size, size_t align
 		}
 
 		err = __kmem_cache_create(s, flags);
-		if (!err)
+		if (!err) {
 
+			s->refcount = 1;
 			list_add(&s->list, &slab_caches);
 
-		else {
+		} else {
 			kfree(s->name);
 			kmem_cache_free(kmem_cache, s);
 		}

mm/slob.c

@@ -524,7 +524,6 @@ int __kmem_cache_create(struct kmem_cache *c, unsigned long flags)
 	if (c->align < align)
 		c->align = align;
 
-	c->refcount = 1;
 	return 0;
 }
 

mm/slub.c

@@ -3093,7 +3093,6 @@ static int kmem_cache_open(struct kmem_cache *s, unsigned long flags)
 	else
 		s->cpu_partial = 30;
 
-	s->refcount = 1;
 #ifdef CONFIG_NUMA
 	s->remote_node_defrag_ratio = 1000;
 #endif