WQ_POWER_EFFICIENT
WQ_FREEZABLE | WQ_POWER_EFFICIENT | WQ_PERCPU, 0);
if ((flags & WQ_POWER_EFFICIENT) && wq_power_efficient)
WQ_POWER_EFFICIENT | WQ_PERCPU, 0);
WQ_FREEZABLE | WQ_POWER_EFFICIENT | WQ_PERCPU, 0);