CURRENT_CLOCK
frm->frm_clock = CURRENT_CLOCK;
last_clock = CURRENT_CLOCK;
start_clock = CURRENT_CLOCK;
&ss->ss_watchdog_mutex, CURRENT_CLOCK +
if ((xch->xch_end_tick < CURRENT_CLOCK) &&
CURRENT_CLOCK, frm->frm_clock);
CURRENT_CLOCK, frm->frm_clock);