machine__for_each_dso
ret = machine__for_each_dso(machine, subdivided_dso_cb, dso);
int ret = machine__for_each_dso(&machines->host, fn, priv);
ret |= machine__for_each_dso(pos, fn, priv);
int machine__for_each_dso(struct machine *machine, machine__dso_t fn,