--- old/drivers/block/ll_rw_blk.c	2003-05-14 23:11:08.000000000 +0200
+++ new/drivers/block/ll_rw_blk.c	2003-05-28 13:04:34.000000000 +0200
@@ -829,9 +829,10 @@ void blkdev_release_request(struct reque
 	 */
 	if (q) {
 		list_add(&req->queue, &q->rq[rw].free);
-		if (++q->rq[rw].count >= q->batch_requests &&
-				waitqueue_active(&q->wait_for_requests[rw]))
+		if (++q->rq[rw].count >= q->batch_requests) {
+			smp_mb();
 			wake_up(&q->wait_for_requests[rw]);
+		}
 	}
 }