slub: Simplify control flow in __slab_alloc()

Simplify control flow a bit avoiding nesting.
Signed-off-by: NChristoph Lameter <cl@linux.com>
Signed-off-by: NPekka Enberg <penberg@kernel.org>

mm/slub.c

@@ -2272,8 +2272,7 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
 	/* Then do expensive stuff like retrieving pages from the partial lists */
 	freelist = get_partial(s, gfpflags, node, c);
 
-	if (unlikely(!freelist)) {
-
+	if (!freelist)
 		freelist = new_slab_objects(s, gfpflags, node, &c);
 
 	if (unlikely(!freelist)) {
@@ -2283,7 +2282,6 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
 		local_irq_restore(flags);
 		return NULL;
 	}
-	}
 
 	if (likely(!kmem_cache_debug(s)))
 		goto load_freelist;