snd_seq_compare_tick_time
return snd_seq_compare_tick_time(current_time, &ev->time.tick);
res = snd_seq_compare_tick_time(&ev->time.tick, &info->time.tick);
res = snd_seq_compare_tick_time(&ev->time.tick, &info->time.tick);
return (snd_seq_compare_tick_time(&a->time.tick, &b->time.tick));