prepare_to_wait_event
prepare_to_wait_event(&server->probe_wq, &wait,
ret2 = prepare_to_wait_event(&ctx->wait, &w.w, TASK_INTERRUPTIBLE);
ret = prepare_to_wait_event(&ticket->wait, &wait, TASK_KILLABLE);
prepare_to_wait_event(wq_head, &wqe.wq_entry, TASK_UNINTERRUPTIBLE);
prepare_to_wait_event(wq_head, &wqe.wq_entry, TASK_UNINTERRUPTIBLE);
prepare_to_wait_event(wq_head, &wqe.wq_entry, TASK_UNINTERRUPTIBLE);
prepare_to_wait_event(wq_head, &wqe.wq_entry, TASK_UNINTERRUPTIBLE);
prepare_to_wait_event(wq_head, &wqe.wq_entry, TASK_UNINTERRUPTIBLE);
long prepare_to_wait_event(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry, int state);
long __int = prepare_to_wait_event(&wq_head, &__wq_entry, state);\
long __int = prepare_to_wait_event(__wq_head, \
EXPORT_SYMBOL(prepare_to_wait_event);
ret = prepare_to_wait_event(&filter->wqh, &wait, TASK_INTERRUPTIBLE);