--- zzzz-none-000/linux-3.10.107/drivers/media/tuners/tda18218.h 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/drivers/media/tuners/tda18218.h 2021-02-04 17:41:59.000000000 +0000 @@ -30,7 +30,7 @@ u8 loop_through:1; }; -#if IS_ENABLED(CONFIG_MEDIA_TUNER_TDA18218) +#if IS_REACHABLE(CONFIG_MEDIA_TUNER_TDA18218) extern struct dvb_frontend *tda18218_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct tda18218_config *cfg); #else