Hi Krzysztof, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 094226ad94f471a9f19e8f8e7140a09c2625abaa commit: 5b7f4e5de61ba8c44317718936864da29eeba62a ASoC: codecs: allow compile testing without MFD drivers date: 3 months ago config: x86_64-buildonly-randconfig-r003-20221114 compiler: gcc-11 (Debian 11.3.0-8) 11.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5b7f4e5de61ba8c44317718936864da29eeba62a git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 5b7f4e5de61ba8c44317718936864da29eeba62a # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash sound/soc/codecs/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> sound/soc/codecs/lochnagar-sc.c:247:34: warning: 'lochnagar_of_match' defined but not used [-Wunused-const-variable=] 247 | static const struct of_device_id lochnagar_of_match[] = { | ^~~~~~~~~~~~~~~~~~ vim +/lochnagar_of_match +247 sound/soc/codecs/lochnagar-sc.c 16123412a6283b Piotr Stankiewicz 2019-03-20 246 16123412a6283b Piotr Stankiewicz 2019-03-20 @247 static const struct of_device_id lochnagar_of_match[] = { 16123412a6283b Piotr Stankiewicz 2019-03-20 248 { .compatible = "cirrus,lochnagar2-soundcard" }, 16123412a6283b Piotr Stankiewicz 2019-03-20 249 {} 16123412a6283b Piotr Stankiewicz 2019-03-20 250 }; 16123412a6283b Piotr Stankiewicz 2019-03-20 251 MODULE_DEVICE_TABLE(of, lochnagar_of_match); 16123412a6283b Piotr Stankiewicz 2019-03-20 252 :::::: The code at line 247 was first introduced by commit :::::: 16123412a6283bcf956f1a377f2e799a79c2b439 ASoC: lochnagar: Add driver to support Lochnagar 2 sound card :::::: TO: Piotr Stankiewicz :::::: CC: Mark Brown -- 0-DAY CI Kernel Test Service https://01.org/lkp