rtc_task_t        179 include/linux/rtc.h int rtc_register(rtc_task_t *task);
rtc_task_t        180 include/linux/rtc.h int rtc_unregister(rtc_task_t *task);
rtc_task_t        181 include/linux/rtc.h int rtc_control(rtc_task_t *t, unsigned int cmd, unsigned long arg);