2 files changed, 27 insertions, 1 deletions

diff --git a/mm/slab.c b/mm/slab.c
index f989af87b72c..328233a724af 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2104,6 +2104,32 @@ 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++;
+
+                /*
+                 * Adjust the object sizes so that we clear
+                 * the complete object on kzalloc.
+                 */
+                cachep->object_size = max_t(int, cachep->object_size, size);
+        }
+        return cachep;
+}
+
 /**
  * __kmem_cache_create - Create a cache.
  * @cachep: cache management descriptor
diff --git a/mm/slab.h b/mm/slab.h
index c44d28b60609..50d29d716db4 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -92,7 +92,7 @@ struct mem_cgroup;
 int slab_unmergeable(struct kmem_cache *s);
 struct kmem_cache *find_mergeable(size_t size, size_t align,
                 unsigned long flags, const char *name, void (*ctor)(void *));
-#ifdef CONFIG_SLUB
+#ifndef CONFIG_SLOB
 struct kmem_cache *
 __kmem_cache_alias(const char *name, size_t size, size_t align,
                    unsigned long flags, void (*ctor)(void *));