block: add a blk_steal_bios helper

}

EXPORT_SYMBOL(blk_fetch_request);

/*

 * Steal bios from a request and add them to a bio list.

 * The request must not have been partially completed before.

 */

void blk_steal_bios(struct bio_list *list, struct request *rq)

{

	if (rq->bio) {

		if (list->tail)

			list->tail->bi_next = rq->bio;

		else

			list->head = rq->bio;

		list->tail = rq->biotail;

		rq->bio = NULL;

		rq->biotail = NULL;

	}

	rq->__data_len = 0;

}

EXPORT_SYMBOL_GPL(blk_steal_bios);

/**

 * blk_update_request - Special helper function for request stacking drivers

 * @req:      the request being processed

extern void blk_start_request(struct request *rq);

extern struct request *blk_fetch_request(struct request_queue *q);

void blk_steal_bios(struct bio_list *list, struct request *rq);

/*

 * Request completion related functions.

 *