Building with the attached random configuration file,
sound/soc/codecs/cs4271.c: In function 'cs4271_i2c_probe':
sound/soc/codecs/cs4271.c:721:2: error: implicit declaration of
function 'cs4271_common_probe' [-Werror=implicit-function-declaration]
ret = cs4271_common_probe(&client->dev, &cs4271);
^
cc1: some warnings being treated as errors
make[3]: *** [sound/soc/codecs/cs4271.o] Error 1