| Supporting multiple CPU idle levels in kernel
| cpuidle governors
|cpuidle governor is policy routine that decides what idle state to enter at
|any given time. cpuidle core uses different callbacks to the governor.
|* enable() to enable governor for a particular device
|* disable() to disable governor for a particular device
|* select() to select an idle state to enter
|* reflect() called after returning from the idle state, which can be used
| by the governor for some record keeping.
|More than one governor can be registered at the same time and
|users can switch between drivers using /sysfs interface (when enabled).
|More than one governor part is supported for developers to easily experiment
|with different governors. By default, most optimal governor based on your
|kernel configuration and platform will be selected by cpuidle.
|extern int cpuidle_register_governor(struct cpuidle_governor *gov);