fu_instance
if ((f_user->fu_instance != -1) &&
(f_user->fu_instance == di_instance(di_node))) {
if ((f_user->fu_instance == -1) && (f_user->fu_minor == -1)) {
fu_data->fud_user[fu_data->fud_user_count].fu_instance = instance;
if (f_user1->fu_instance != f_user2->fu_instance)
return ((f_user1->fu_instance < f_user2->fu_instance) ? -1 : 1);