diff --git a/mm/slab.h b/mm/slab.h
index 7bff1ee..65e7c3f 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -307,6 +307,8 @@
 
 extern void slab_init_memcg_params(struct kmem_cache *);
 extern void memcg_link_cache(struct kmem_cache *s);
+extern void slab_deactivate_memcg_cache_rcu_sched(struct kmem_cache *s,
+				void (*deact_fn)(struct kmem_cache *));
 
 #else /* CONFIG_MEMCG && !CONFIG_SLOB */