Hi Valentin, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on tip/auto-latest] [also build test WARNING on driver-core/driver-core-testing tip/sched/core arm/for-next arm64/for-next/core soc/for-next linus/master v5.7 next-20200613] [cannot apply to linux/master] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Valentin-Schneider/sched-arch_to... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 8dc697d75c13ee2901d1a40f1d7d58163048c204 config: arm64-randconfig-r013-20200614 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project cb5072d1877b38c972f95092db2cedbcddb81da6) 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 # 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 >>, old ones prefixed by <<): void arch_set_thermal_pressure(const struct cpumask *cpus, ^ drivers/base/arch_topology.c:59:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void arch_set_thermal_pressure(const struct cpumask *cpus, ^ static 1 warning generated. vim +/arch_set_thermal_pressure +59 drivers/base/arch_topology.c 58 60 unsigned long th_pressure) 61 { 62 int cpu; 63 64 for_each_cpu(cpu, cpus) 65 WRITE_ONCE(per_cpu(thermal_pressure, cpu), th_pressure); 66 } 67 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org