Hi Xiaojian, FYI, the error/warning still remains. tree: git://people.freedesktop.org/~agd5f/linux.git amd-staging-drm-next head: 11e500d2892a2b18e438c12e1e992b241aaf1c8b commit: 53501c771afda638485683d189a2b2e2ad776d38 [576/598] drm/amd/pm: add the fine grain tuning function for vangogh config: x86_64-randconfig-a004-20201115 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ace9653c11c6308401dcda2e8b26bf97e6e66e30) 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 git remote add radeon-alex git://people.freedesktop.org/~agd5f/linux.git git fetch --no-tags radeon-alex amd-staging-drm-next git checkout 53501c771afda638485683d189a2b2e2ad776d38 # 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 vangogh_set_default_dpm_tables(struct smu_context *smu) ^ drivers/gpu/drm/amd/amdgpu/../pm/swsmu/smu11/vangogh_ppt.c:764:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int vangogh_set_default_dpm_tables(struct smu_context *smu) ^ static 1 warning generated. vim +/vangogh_set_default_dpm_tables +764 drivers/gpu/drm/amd/amdgpu/../pm/swsmu/smu11/vangogh_ppt.c 763 765 { 766 struct smu_table_context *smu_table = &smu->smu_table; 767 768 return smu_cmn_update_table(smu, SMU_TABLE_DPMCLOCKS, 0, smu_table->clocks_table, false); 769 } 770 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org