OPP_LEVEL_UNSET
if (opp->level == OPP_LEVEL_UNSET)
opp->level = OPP_LEVEL_UNSET;
bool level_match = (key->level == OPP_LEVEL_UNSET || opp_key->level == key->level);
if (temp == OPP_LEVEL_UNSET) {
if (opp->level == OPP_LEVEL_UNSET) {