alloc_workqueue
mn->wq = alloc_workqueue("i915-userptr-release",
alloc_workqueue("i915-userptr-acquire",
system_wq = alloc_workqueue("system_wq", 0, 1);
system_highpri_wq = alloc_workqueue("system_highpri_wq", WQ_HIGHPRI, 1);
system_long_wq = alloc_workqueue("system_long_wq", 0, 1);
system_unbound_wq = alloc_workqueue("system_unbound_wq", WQ_UNBOUND, 1);
system_power_efficient_wq = alloc_workqueue("system_power_efficient_wq", 0, 1);
radeon_crtc->flip_queue = alloc_workqueue("radeon-crtc", WQ_HIGHPRI, 0);