mm: Fix build warning in kmem_cache_create()

The label oops is used in CONFIG_DEBUG_VM ifdef block and is defined
outside ifdef CONFIG_DEBUG_VM block. This results in the following
build warning when built with CONFIG_DEBUG_VM disabled. Fix to move
label oops definition to inside a CONFIG_DEBUG_VM block.

mm/slab_common.c: In function ‘kmem_cache_create’:
mm/slab_common.c:101:1: warning: label ‘oops’ defined but not used
[-Wunused-label]
Signed-off-by: Shuah Khan <shuah.khan@hp.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

mm/slab_common.c

@@ -98,7 +98,9 @@ struct kmem_cache *kmem_cache_create(const char *name, size_t size, size_t align
 
 	s = __kmem_cache_create(name, size, align, flags, ctor);
 
+#ifdef CONFIG_DEBUG_VM
 oops:
+#endif
 	mutex_unlock(&slab_mutex);
 	put_online_cpus();