mm/slab_common.c: suppress warning

False positive:

mm/slab_common.c: In function 'kmem_cache_create':
mm/slab_common.c:204: warning: 's' may be used uninitialized in this function

Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/slab_common.c

@@ -211,8 +211,10 @@ kmem_cache_create(const char *name, size_t size, size_t align,
 	mutex_lock(&slab_mutex);
 
 	err = kmem_cache_sanity_check(name, size);
-	if (err)
+	if (err) {
+		s = NULL;	/* suppress uninit var warning */
 		goto out_unlock;
+	}
 
 	/*
 	 * Some allocators will constraint the set of valid flags to a subset