poll_to_key
vhost_poll_wakeup(&poll->wait, 0, 0, poll_to_key(mask));
__wake_up(x, TASK_NORMAL, 1, poll_to_key(m))
__wake_up_on_current_cpu(x, TASK_NORMAL, poll_to_key(m))
__wake_up_locked_key((x), TASK_NORMAL, poll_to_key(m))
__wake_up(x, TASK_INTERRUPTIBLE, 1, poll_to_key(m))
__wake_up_sync_key((x), TASK_INTERRUPTIBLE, poll_to_key(m))
__wake_up_locked_sync_key((x), TASK_INTERRUPTIBLE, poll_to_key(m))
__wake_up(wq, TASK_NORMAL, 0, poll_to_key(EPOLL_URING_WAKE | EPOLLIN));
__wake_up(wq_head, TASK_NORMAL, 0, poll_to_key(EPOLLHUP | POLLFREE));
poll_to_key(EPOLLIN | EPOLLRDNORM));