sleepq_insert
sleepq_insert(sqp, t);
sleepq_insert(&sqh->sq_queue, t);
sleepq_insert(&ts->ts_sleepq[qnum], t);
sleepq_insert(sqp, t);
extern void sleepq_insert(sleepq_t *, struct _kthread *);
sleepq_insert(sqp, t);
sleepq_insert(&sqh->sq_queue, t);