flush_syncq
ASSERT(flush_syncq(rq->q_syncq, rq) == 0);
ASSERT(flush_syncq(WR(rq)->q_syncq, WR(rq)) == 0);
ASSERT(flush_syncq(qp->q_syncq, qp) == 0);
ASSERT(flush_syncq(wqp->q_syncq, wqp) == 0);
ASSERT(flush_syncq(rq->q_syncq, rq) == 0);
ASSERT(flush_syncq(wrq->q_syncq, wrq) == 0);
(void) flush_syncq(qp->q_syncq, qp);
(void) flush_syncq(wqp->q_syncq, wqp);
extern int flush_syncq(syncq_t *, queue_t *);