/* Query io scheduler to see if the current process issuing bio may be merged with rq.  */
static int elv_iosched_allow_merge(struct request *rq, struct bio *bio)
/* Query io scheduler to see if the current process issuing bio may be merged with rq.  */
static int elv_iosched_allow_merge(struct request *rq, struct bio *bio)
{
	struct request_queue *q = rq->q;
	struct elevator_queue *e = q->elevator;
	if (e->ops->elevator_allow_merge_fn)
		return e->ops->elevator_allow_merge_fn(q, rq, bio);
	return 1;
}