diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 9b55f12..6301af2 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1729,8 +1729,8 @@
 	 * threshold
 	 */
 	if (bdi_has_dirty_io(&q->backing_dev_info))
-		bdi_start_writeback(&q->backing_dev_info, nr_pages,
-					WB_REASON_LAPTOP_TIMER);
+		wb_start_writeback(&q->backing_dev_info.wb, nr_pages, true,
+				   WB_REASON_LAPTOP_TIMER);
 }
 
 /*