Hi Matti, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on 09162bc32c880a791c6c0668ce0745cf7958f576] url: https://github.com/0day-ci/linux/commits/Matti-Vaittinen/power-supply-Add... base: 09162bc32c880a791c6c0668ce0745cf7958f576 config: arm64-randconfig-r005-20201210 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 1968804ac726e7674d5de22bc2204b45857da344) 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/0day-ci/linux/commit/9509c087743c74e8a856860210f287d98... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Matti-Vaittinen/power-supply-Add-some-fuel-gauge-logic/20201204-205731 git checkout 9509c087743c74e8a856860210f287d980d5da1b # 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 >>): int bd71827_get_ocv(struct sw_gauge *sw, int dsoc, int temp, int *ocv) ^ drivers/power/supply/bd71827-power.c:996:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int bd71827_get_ocv(struct sw_gauge *sw, int dsoc, int temp, int *ocv) ^ static int bd7182x_get_irqs(struct platform_device *pdev, struct bd71827_power *pwr) ^ drivers/power/supply/bd71827-power.c:1745:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int bd7182x_get_irqs(struct platform_device *pdev, struct bd71827_power *pwr) ^ static int bd7182x_get_rsens(struct bd71827_power *pwr) ^ drivers/power/supply/bd71827-power.c:1782:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int bd7182x_get_rsens(struct bd71827_power *pwr) ^ static 3 warnings generated. vim +/bd71827_get_ocv +996 drivers/power/supply/bd71827-power.c 990 991 /* 992 * Standard batinfo supports only accuracy of 1% for SOC - which 993 * may not be sufficient for us. SWGAUGE provides soc in unts of 0.1% here 994 * to allow more accurate computation. 995 */ 997 { 998 int i = 0; 999 1000 if (dsoc > soc_table[0]) { 1001 *ocv = MAX_VOLTAGE_DEFAULT; 1002 return 0; 1003 } 1004 if (dsoc == 0) { 1005 *ocv = ocv_table[21]; 1006 return 0; 1007 } 1008 1009 i = 0; 1010 while (i < 22) { 1011 if ((dsoc <= soc_table[i]) && (dsoc > soc_table[i+1])) { 1012 *ocv = (ocv_table[i] - ocv_table[i+1]) * 1013 (dsoc - soc_table[i+1]) / (soc_table[i] - 1014 soc_table[i+1]) + ocv_table[i+1]; 1015 return 0; 1016 } 1017 i++; 1018 } 1019 1020 *ocv = ocv_table[22]; 1021 1022 return 0; 1023 } 1024 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org