tree: https://github.com/omap-audio/linux-audio peter/linux-next-wip head: afd9de4bdc2361d1f36b24f414d1b2806b8ae755 commit: f546bca85f3cf64646dbd21dcc779633cc176038 [21/63] ASoC: Initial driver for TAS2555 Smart Amplifier config: x86_64-randconfig-a013-20210718 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 5d5b08761f944d5b9822d582378333cc4b36a0a7) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/omap-audio/linux-audio/commit/f546bca85f3cf64646dbd21d... git remote add omap-audio https://github.com/omap-audio/linux-audio git fetch --no-tags omap-audio peter/linux-next-wip git checkout f546bca85f3cf64646dbd21dcc779633cc176038 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): int ret; ^ 1 warning generated. vim +/ret +96 sound/soc/codecs/tas2555.c 90 91 static unsigned int tas2555_read(struct snd_soc_component *component, 92 unsigned int reg) 93 { 94 struct tas2555_priv *tas2555 = snd_soc_component_get_drvdata(component); 95 unsigned int value = 0; 97 98 dev_dbg(component->dev, "%s: BOOK:PAGE:REG %u:%u:%u\n", __func__, 99 TAS2555_BOOK_ID(reg), TAS2555_PAGE_ID(reg), 100 TAS2555_PAGE_REG(reg)); 101 tas2555_change_book(tas2555, TAS2555_BOOK_ID(reg)); 102 ret = regmap_read(tas2555->regmap, TAS2555_BOOK_REG(reg), &value); 103 return value; 104 } 105 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org