diff --git a/mm/filemap.c b/mm/filemap.c
index a3dbe9eff213..416d563468a3 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1019,7 +1019,7 @@ EXPORT_SYMBOL_GPL(page_endio);
 
 /**
  * __lock_page - get a lock on the page, assuming we need to sleep to get it
- * @page: the page to lock
+ * @__page: the page to lock
  */
 void __lock_page(struct page *__page)
 {