--- zzzz-none-000/linux-3.10.107/drivers/media/dvb-frontends/isl6421.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/media/dvb-frontends/isl6421.h	2021-02-04 17:41:59.000000000 +0000
@@ -39,7 +39,7 @@
 #define ISL6421_ISEL1	0x20
 #define ISL6421_DCL	0x40
 
-#if IS_ENABLED(CONFIG_DVB_ISL6421)
+#if IS_REACHABLE(CONFIG_DVB_ISL6421)
 /* override_set and override_clear control which system register bits (above) to always set & clear */
 extern struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
 			  u8 override_set, u8 override_clear, bool override_tone);