1 files changed, 3 insertions, 3 deletions
diff --git a/mm/slab.h b/mm/slab.h
index 53a55c70c409..078acbcf64e8 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -209,15 +209,15 @@ cache_from_memcg_idx(struct kmem_cache *s, int idx)
 
 	rcu_read_lock();
 	params = rcu_dereference(s->memcg_params);
-	cachep = params->memcg_caches[idx];
-	rcu_read_unlock();
 
 	/*
 	 * Make sure we will access the up-to-date value. The code updating
 	 * memcg_caches issues a write barrier to match this (see
 	 * memcg_register_cache()).
 	 */
-	smp_read_barrier_depends();
+	cachep = lockless_dereference(params->memcg_caches[idx]);
+	rcu_read_unlock();
+
 	return cachep;
 }