/* Get and set a new active queue for service.  */
static struct cfq_queue* cfq_set_active_queue(struct cfq_data *cfqd, struct cfq_queue *cfqq)
/* Get and set a new active queue for service.  */
static struct cfq_queue* cfq_set_active_queue(struct cfq_data *cfqd, struct cfq_queue *cfqq)
{
	if (!cfqq)
		cfqq = cfq_get_next_queue(cfqd);
	__cfq_set_active_queue(cfqd, cfqq);
	return cfqq;
}