prepare_sleep_state
status_t (*prepare_sleep_state)(uint8 state, void (*wakeFunc)(void),
status_t (*prepare_sleep_state)(uint8 state, void (*wakeFunc)(void),
status_t prepare_sleep_state(uint8 state, void (*wakeFunc)(void), size_t size);
prepare_sleep_state,
prepare_sleep_state,
status = acpi->prepare_sleep_state(ACPI_POWER_STATE_OFF, NULL, 0);