bintime_sub
bintime_sub(&delta, &c->now_bt);
bintime_sub(&bt_rem, &bt_now);
bintime_sub(&bt, &vlapic->timer_fire_bt);
bintime_sub(&t, &sc->attach_uptime);
bintime_sub(&t, &sc->init_uptime);
bintime_sub(&cur_bt, &io->io_hdr.dma_start_bt);
bintime_sub(&cur_bt, &io->io_hdr.dma_start_bt);
bintime_sub(&bt, &io->io_hdr.start_bt);
bintime_sub(&b2, &b1);
bintime_sub(&b1, &b0);
bintime_sub(&b2, &b1);
bintime_sub(&time, &tx_buf->timestamp);
bintime_sub(&elapsed, &start);
bintime_sub(&elapsed, &start);
bintime_sub(&elapsed, &start);
bintime_sub(&dt, then);
bintime_sub(&dt, &NFSD_VNET(nfsstatsv1_p)->busyfrom);
bintime_sub(&_bt2, bt); \
bintime_sub(bt, &ffclock_boottime);
bintime_sub(bt, &ffclock_boottime);
bintime_sub(&bt, &bt2);
bintime_sub(&t_delta, &t_last);
bintime_sub(&gap_lerp, &ffth->tick_time_lerp);
bintime_sub(&gap_lerp, &ffth->tick_time);
bintime_sub(&ffclock_boottime, &gap_lerp);
bintime_sub(bt, &bt2);
bintime_sub(&bt, &bbt);
bintime_sub(&dt, then);
bintime_sub(&dt, &ds->busy_from);
bintime_sub(&deltat, &h->lastRefill);
bintime_sub(&total_time_bt, &prev_stats->time[i]);
bintime_sub(&total_dma_bt, &prev_stats->dma_time[i]);
bintime_sub(&delta_bt, &entry->start_bt);