tree: https://github.com/frank-w/BPI-R2-4.14 5.14-rc head: 15ab19c94d88070dd93ad282b83ff856be6092fc commit: bacee03d1291cd315553af60d5e24a6a1441cd0f [7/24] mt6625l: add changes outside driver dir config: arm64-randconfig-r036-20210821 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 9e9d70591e72fc6762b4b9a226b68ed1307419bf) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/frank-w/BPI-R2-4.14/commit/bacee03d1291cd315553af60d5e... git remote add frank-w-bpi-r2-4.14 https://github.com/frank-w/BPI-R2-4.14 git fetch --no-tags frank-w-bpi-r2-4.14 5.14-rc git checkout bacee03d1291cd315553af60d5e24a6a1441cd0f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 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 >>): struct regmap *pwrap_node_to_regmap(struct device_node *np) ^ drivers/soc/mediatek/mtk-pmic-wrap.c:2112:1: note: declare 'static' if the function is not intended to be used outside of this translation unit struct regmap *pwrap_node_to_regmap(struct device_node *np) ^ static 1 warning generated. vim +/pwrap_node_to_regmap +2112 drivers/soc/mediatek/mtk-pmic-wrap.c 2111 2113 { 2114 struct platform_device *pdev; 2115 struct pmic_wrapper *wrp; 2116 pdev = of_find_device_by_node(np); 2117 if (!pdev) 2118 return ERR_PTR(-ENODEV); 2119 wrp = platform_get_drvdata(pdev); 2120 return wrp->regmap; 2121 } 2122 EXPORT_SYMBOL_GPL(pwrap_node_to_regmap); 2123 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org