CC      drivers/media/common/tuners/tuner-xc2028.o
In file included from drivers/media/dvb/dvb-core/dvb_frontend.h:42,
                 from drivers/media/common/tuners/tuner-xc2028.h:10,
                 from drivers/media/common/tuners/tuner-xc2028.c:20:
drivers/media/dvb/dvb-core/dvbdev.h:36:2: warning: #warning invalid CONFIG_DVB_MAX_ADAPTERS value
  CC      drivers/media/common/tuners/tuner-simple.o
In file included from drivers/media/dvb/dvb-core/dvb_frontend.h:42,
                 from drivers/media/common/tuners/tuner-simple.h:21,
                 from drivers/media/common/tuners/tuner-simple.c:14:
drivers/media/dvb/dvb-core/dvbdev.h:36:2: warning: #warning invalid CONFIG_DVB_MAX_ADAPTERS value
  CC      drivers/media/common/tuners/tuner-types.o
  CC      drivers/media/common/tuners/mt20xx.o
In file included from drivers/media/dvb/dvb-core/dvb_frontend.h:42,
                 from drivers/media/common/tuners/mt20xx.h:21,
                 from drivers/media/common/tuners/mt20xx.c:11:
drivers/media/dvb/dvb-core/dvbdev.h:36:2: warning: #warning invalid CONFIG_DVB_MAX_ADAPTERS value
  CC      drivers/media/common/tuners/tda8290.o
In file included from drivers/media/dvb/dvb-core/dvb_frontend.h:42,
                 from drivers/media/common/tuners/tda8290.h:21,
                 from drivers/media/common/tuners/tda8290.c:27:
drivers/media/dvb/dvb-core/dvbdev.h:36:2: warning: #warning invalid CONFIG_DVB_MAX_ADAPTERS value
  CC      drivers/media/common/tuners/tea5767.o
In file included from drivers/media/dvb/dvb-core/dvb_frontend.h:42,
                 from drivers/media/common/tuners/tea5767.h:21,
                 from drivers/media/common/tuners/tea5767.c:17:
drivers/media/dvb/dvb-core/dvbdev.h:36:2: warning: #warning invalid CONFIG_DVB_MAX_ADAPTERS value
  CC      drivers/media/common/tuners/tea5761.o
In file included from drivers/media/dvb/dvb-core/dvb_frontend.h:42,
                 from drivers/media/common/tuners/tea5761.h:21,
                 from drivers/media/common/tuners/tea5761.c:15:
drivers/media/dvb/dvb-core/dvbdev.h:36:2: warning: #warning invalid CONFIG_DVB_MAX_ADAPTERS value
  CC      drivers/media/common/tuners/tda9887.o
In file included from drivers/media/dvb/dvb-core/dvb_frontend.h:42,
                 from drivers/media/common/tuners/tda9887.h:21,
                 from drivers/media/common/tuners/tda9887.c:13:
drivers/media/dvb/dvb-core/dvbdev.h:36:2: warning: #warning invalid CONFIG_DVB_MAX_ADAPTERS value
  CC      drivers/media/common/tuners/xc5000.o
In file included from drivers/media/dvb/dvb-core/dvb_frontend.h:42,
                 from drivers/media/common/tuners/xc5000.c:31:
drivers/media/dvb/dvb-core/dvbdev.h:36:2: warning: #warning invalid CONFIG_DVB_MAX_ADAPTERS value
  CC      drivers/media/common/tuners/mc44s803.o
In file included from drivers/media/dvb/dvb-core/dvb_frontend.h:42,
                 from drivers/media/common/tuners/mc44s803.c:27:
drivers/media/dvb/dvb-core/dvbdev.h:36:2: warning: #warning invalid CONFIG_DVB_MAX_ADAPTERS value
  LD      drivers/media/common/tuners/built-in.o

because CONFIG_DVB_MAX_ADAPTERS depends on CONFIG_DVB_CORE which I didn't select
.config attached