diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 2450d89..71a9774 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3061,8 +3061,7 @@
 	/* early check. */
 	if (page_mapped(page))
 		return;
-	if (page->mapping && !PageAnon(page))
-		return;
+	VM_BUG_ON(page->mapping && !PageAnon(page));
 	__mem_cgroup_uncharge_common(page, MEM_CGROUP_CHARGE_TYPE_MAPPED);
 }