rcutorture_seq_diff
completed = rcutorture_seq_diff(completed, rtorsp->started);
rcutorture_seq_diff(gps, gps_old));
gps = rcutorture_seq_diff(cur_ops->get_gp_seq(), gps);
gps = rcutorture_seq_diff(cur_ops->get_gp_seq(), gps);
rcutorture_seq_diff(gp_seq, start_gp_seq));