tree: https://android.googlesource.com/kernel/common android12-5.10-2021-09 head: ece338aaa6b4bdf1c505c64f6b391e5cfabbfee5 commit: 1efc36b815769cb8c7dae1d53373b190c017f5d1 [10732/10848] ANDROID: sched: add a helper function to change PELT half-life config: x86_64-randconfig-r033-20210928 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498) 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 git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android12-5.10-2021-09 git checkout 1efc36b815769cb8c7dae1d53373b190c017f5d1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 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 get_pelt_halflife(void) ^ kernel/sched/pelt.c:35:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int get_pelt_halflife(void) ^ static int set_pelt_halflife(int num) ^ kernel/sched/pelt.c:68:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int set_pelt_halflife(int num) ^ static 2 warnings generated. vim +/get_pelt_halflife +35 kernel/sched/pelt.c 34 36 { 37 return pelt_load_avg_period; 38 } 39 EXPORT_SYMBOL_GPL(get_pelt_halflife); 40 41 static int __set_pelt_halflife(void *data) 42 { 43 int rc = 0; 44 int num = *(int *)data; 45 46 switch (num) { 47 case PELT8_LOAD_AVG_PERIOD: 48 pelt_load_avg_period = PELT8_LOAD_AVG_PERIOD; 49 pelt_load_avg_max = PELT8_LOAD_AVG_MAX; 50 pelt_runnable_avg_yN_inv = pelt8_runnable_avg_yN_inv; 51 pr_info("PELT half life is set to %dms\n", num); 52 break; 53 case PELT32_LOAD_AVG_PERIOD: 54 pelt_load_avg_period = PELT32_LOAD_AVG_PERIOD; 55 pelt_load_avg_max = PELT32_LOAD_AVG_MAX; 56 pelt_runnable_avg_yN_inv = pelt32_runnable_avg_yN_inv; 57 pr_info("PELT half life is set to %dms\n", num); 58 break; 59 default: 60 rc = -EINVAL; 61 pr_err("Failed to set PELT half life to %dms, the current value is %dms\n", 62 num, pelt_load_avg_period); 63 } 64 65 return rc; 66 } 67 69 { 70 return stop_machine(__set_pelt_halflife, &num, NULL); 71 } 72 EXPORT_SYMBOL_GPL(set_pelt_halflife); 73 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org