--- zzzz-none-000/linux-3.10.107/drivers/media/tuners/xc4000.h 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/drivers/media/tuners/xc4000.h 2021-02-04 17:41:59.000000000 +0000 @@ -50,7 +50,7 @@ * it's passed back to a bridge during tuner_callback(). */ -#if IS_ENABLED(CONFIG_MEDIA_TUNER_XC4000) +#if IS_REACHABLE(CONFIG_MEDIA_TUNER_XC4000) extern struct dvb_frontend *xc4000_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct xc4000_config *cfg);