diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index f4ede99c8b9b5671841021afe04d82bd32dfbda0..6c755de385f73e9f681fdedea1c48b7481180eaa 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2429,11 +2429,11 @@ int mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr)
 	}
 	unlock_page_cgroup(pc);
 
+	*ptr = mem;
 	if (mem) {
-		ret = __mem_cgroup_try_charge(NULL, GFP_KERNEL, &mem, false);
+		ret = __mem_cgroup_try_charge(NULL, GFP_KERNEL, ptr, false);
 		css_put(&mem->css);
 	}
-	*ptr = mem;
 	return ret;
 }