Hi Athira, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on powerpc/next] [also build test WARNING on tip/perf/core v5.8-rc3 next-20200702] [cannot apply to kvm-ppc/kvm-ppc-next] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Athira-Rajeev/powerpc-perf-Add-support-for-power10-PMU-Hardware/20200701-181147 base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next config: powerpc-allyesconfig (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> arch/powerpc/perf/power10-pmu.c:393:5: warning: no previous prototype for 'init_power10_pmu' [-Wmissing-prototypes] 393 | int init_power10_pmu(void) | ^~~~~~~~~~~~~~~~ vim +/init_power10_pmu +393 arch/powerpc/perf/power10-pmu.c 392 > 393 int init_power10_pmu(void) --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org