drbd: Removed left over, now wrong comments

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

drivers/block/drbd/drbd_req.c

@@ -983,13 +983,7 @@ static int drbd_make_request_common(struct drbd_conf *mdev, struct bio *bio, uns
 		}
 
 		if (congested) {
-			/* rs_pending_cnt must be zero, otherwise the two peers
-			   might get different bitmaps. With sane configurations
-			   the resync stalls long before we might want to go into
-			   AHEAD mode.
-			   We could force the resync into PAUSE mode here if
-			   rs_pending_cnt is > 0 ... */
-			queue_barrier(mdev);
+			queue_barrier(mdev); /* last barrier, after mirrored writes */
 
 			if (mdev->net_conf->on_congestion == OC_PULL_AHEAD)
 				_drbd_set_state(_NS(mdev, conn, C_AHEAD), 0, NULL);