VDO_WORK_Q_DEFAULT_PRIORITY
vdo_enqueue_completion(completion, VDO_WORK_Q_DEFAULT_PRIORITY);
vdo_launch_completion_with_priority(completion, VDO_WORK_Q_DEFAULT_PRIORITY);
if (completion->priority == VDO_WORK_Q_DEFAULT_PRIORITY)
vdo_enqueue_completion(&vio->completion, VDO_WORK_Q_DEFAULT_PRIORITY);