timespec64_add
system_time = timespec64_add(now, tk->wall_to_monotonic);
*ts = timespec64_add(now, ts_monotonic);
now = timespec64_add(now, then);
ptp_data->clock_time = timespec64_add(ptp_data->clock_time, delta64);
now = timespec64_add(now, then);
now = timespec64_add(now, then);
now = timespec64_add(now, then);
now = timespec64_add(now, then);
ts = timespec64_add(adapter->perout[tsintr_tt].start,
now = timespec64_add(now, then);
ts = timespec64_add(adapter->perout[0].start,
ts = timespec64_add(adapter->perout[1].start,
now = timespec64_add(now, then);
now = timespec64_add(now, then);
ts2 = timespec64_add(ts2, ts);
return timespec64_add(now, ts);
*ts = timespec64_add(*ts, ns_offsets->monotonic);
*ts = timespec64_add(*ts, ns_offsets->boottime);
tp = timespec64_add(tp, off->val);
*to_set = timespec64_add(*now, delay);
tmp = timespec64_add(tk_xtime(tks), *ts);
timespec64_add(timekeeping_suspend_time, delta_delta);
ts = timespec64_add(con->last_keepalive_ack, ts);