cpuidle_register_driver
if (!cpuidle_register_driver(&apm_idle_driver))
ret = cpuidle_register_driver(&acpi_idle_driver);
err = cpuidle_register_driver(&cps_driver);
ret = cpuidle_register_driver(drv);
ret = cpuidle_register_driver(drv);
EXPORT_SYMBOL_GPL(cpuidle_register_driver);
retval = cpuidle_register_driver(&intel_idle_driver);
extern int cpuidle_register_driver(struct cpuidle_driver *drv);