return 1;
return;
int md_write_start(mddev_t *mddev, struct bio *bi){	if (bio_data_dir(bi) != WRITE)		return 1;	atomic_inc(&mddev->writes_pending);	spin_lock(&mddev->write_lock);	if (mddev->in_sync == 0 && mddev->sb_dirty == 0) {		spin_unlock(&mddev->write_lock);		return 1;	}	bio_list_add(&mddev->write_list, bi);	if (mddev->in_sync) {		mddev->in_sync = 0;		mddev->sb_dirty = 1;	}	spin_unlock(&mddev->write_lock);	md_wakeup_thread(mddev->thread);	return 0;}