__do_once_start     8 include/linux/once.h bool __do_once_start(bool *done, unsigned long *flags);
__do_once_start    45 include/linux/once.h 			___ret = __do_once_start(&___done, &___flags);	     \
__do_once_start    53 lib/once.c     EXPORT_SYMBOL(__do_once_start);