fr_slowtimer
ifs->ifs_fr_timer_id = timeout(fr_slowtimer,
void fr_slowtimer __P((void *arg))
ifs->ifs_fr_timer_id = timeout(fr_slowtimer, arg,
void fr_slowtimer __P((void *arg))
callout_reset(&fr_slowtimer_ch, hz / 2, fr_slowtimer, NULL);
fr_slowtimer_ch = timeout(fr_slowtimer, NULL, hz/2);
timeout(fr_slowtimer, NULL, hz/2);
extern void fr_slowtimer __P((void *));
extern void fr_slowtimer __P((void *));
extern void fr_slowtimer __P((long));
extern int fr_slowtimer __P((void *));