load_nvlist
rc = load_nvlist(spa, config_object, &nvlist);
if (load_nvlist(spa, spa->spa_config_object, &mos_config)
if (load_nvlist(spa, spa->spa_config_object, &mos_config) != 0) {
if (load_nvlist(spa, spa->spa_spares.sav_object,
if (load_nvlist(spa, spa->spa_l2cache.sav_object,