diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 031ca345677b9293093af8c17f6a7e906fe4bf79..78cb3b05a9fac6be7488acb8b4b3376109a8b613 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2467,10 +2467,6 @@ static void commit_charge(struct page *page, struct mem_cgroup *memcg,
 	int isolated;
 
 	VM_BUG_ON_PAGE(pc->mem_cgroup, page);
-	/*
-	 * we don't need page_cgroup_lock about tail pages, becase they are not
-	 * accessed by any other context at this point.
-	 */
 
 	/*
 	 * In some cases, SwapCache and FUSE(splice_buf->radixtree), the page