em_dev_register_perf_domain
em_dev_register_perf_domain(get_cpu_device(policy->cpu),
em_dev_register_perf_domain(get_cpu_device(policy->cpu), data->nr_opp,
em_dev_register_perf_domain(get_cpu_device(policy->cpu), priv->nr_opp,
ret = em_dev_register_perf_domain(dev, nr_opp, &em_cb, cpus, true);
int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states,
EXPORT_SYMBOL_GPL(em_dev_register_perf_domain);