cpu_wakeup_latency_qos_limit
int global_wake_req = cpu_wakeup_latency_qos_limit();
wakeup_constraint = cpu_wakeup_latency_qos_limit();
s64 constraint_ns = cpu_wakeup_latency_qos_limit() * NSEC_PER_USEC;
s32 cpu_wakeup_latency_qos_limit(void);
max_latency_ns = cpu_wakeup_latency_qos_limit() *