taskqueue_member
return (taskqueue_member(tq->tq_queue, thread));
KASSERT(taskqueue_member(taskqueue_thread, curthread) != 0,
KASSERT(taskqueue_member(taskqueue_thread, curthread) != 0,
taskqueue_member(taskqueue_deferred_unmount, curthread) == 0) {
int taskqueue_member(struct taskqueue *queue, struct thread *td);