dev_wait
{DM_DEV_WAIT_CMD, 0, dev_wait},
init_waitqueue_head(&rdev->dev_wait);
wait_event(rdev->dev_wait, ({
wake_up(&rdev->dev_wait);
wait_queue_head_t dev_wait;
wait_event(rdev->dev_wait, ({
wake_up(&rdev->dev_wait);
init_waitqueue_head(&rdev->dev_wait);
wait_queue_head_t dev_wait;