Hi Bard, I love your patch! Yet something to improve: [auto build test ERROR on asoc/for-next] [also build test ERROR on v5.10 next-20201211] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Bard-Liao/ASoC-max98373-don-t-ac... base: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next config: x86_64-randconfig-a004-20201214 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project d38205144febf4dc42c9270c6aa3d978f1ef65e1) 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/0day-ci/linux/commit/899726a1d67ac801c08a1566f55d96fe6... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Bard-Liao/ASoC-max98373-don-t-access-volatile-registers-in-bias-level-off/20201214-144511 git checkout 899726a1d67ac801c08a1566f55d96fe69d5e315 # 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 errors (new ones prefixed by >>): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org