diff --git a/mm/slab.c b/mm/slab.c
index 09b060e..a1cc1c9 100644
--- a/mm/slab.c
+++ b/mm/slab.c

@@ -2052,6 +2052,26 @@ static int __init_refok setup_cpu_cache(struct kmem_cache *cachep, gfp_t gfp)
 	return 0;
 }

+unsigned long kmem_cache_flags(unsigned long object_size,
+	unsigned long flags, const char *name,
+	void (*ctor)(void *))
+{
+	return flags;
+}
+
+struct kmem_cache *
+__kmem_cache_alias(const char *name, size_t size, size_t align,
+		   unsigned long flags, void (*ctor)(void *))
+{
+	struct kmem_cache *cachep;
+
+	cachep = find_mergeable(size, align, flags, name, ctor);
+	if (cachep)
+		cachep->refcount++;
+
+	return cachep;
+}
+