WQ_HIGHPRI
WQ_HIGHPRI | WQ_UNBOUND,
WQ_HIGHPRI);
WQ_HIGHPRI | WQ_FREEZABLE);
system_highpri_wq = alloc_workqueue("system_highpri_wq", WQ_HIGHPRI, 1);
if (flags & WQ_HIGHPRI)
radeon_crtc->flip_queue = alloc_workqueue("radeon-crtc", WQ_HIGHPRI, 0);