diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 091a364..d0da306 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -1897,8 +1897,8 @@
 		struct wb_iter iter;
 
 		bdi_for_each_wb(wb, bdi, &iter, 0)
-			if (!list_empty(&bdi->wb.b_dirty_time))
-				wb_wakeup(&bdi->wb);
+			if (!list_empty(&wb->b_dirty_time))
+				wb_wakeup(wb);
 	}
 	rcu_read_unlock();
 	schedule_delayed_work(&dirtytime_work, dirtytime_expire_interval * HZ);