Q_SQDRAINING
ASSERT((qp->q_sqflags & (Q_SQQUEUED | Q_SQDRAINING)) == 0);
ASSERT((wqp->q_sqflags & (Q_SQQUEUED | Q_SQDRAINING)) == 0);
(qp->q_sqflags & Q_SQDRAINING));
qp->q_sqflags |= Q_SQDRAINING;
ASSERT(qp->q_sqflags & Q_SQDRAINING);
qp->q_sqflags &= ~Q_SQDRAINING;