Hi Parth, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on powerpc/next] [also build test WARNING on v5.14-rc1 next-20210712] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Parth-Shah/Paravirtualize-idle-C... 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 # https://github.com/0day-ci/linux/commit/09b5719b7516bcf50add81162e131d53e... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Parth-Shah/Paravirtualize-idle-CPU-wakeup-optimization/20210713-132728 git checkout 09b5719b7516bcf50add81162e131d53ec10aeca # 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 <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 3071 | void set_idle_hint_for_kvm(struct kvm *kvm, int cpu, int value) | ^~~~~~~~~~~~~~~~~~~~~ vim +/set_idle_hint_for_kvm +3071 arch/powerpc/kvm/book3s_hv.c 3070 3072 { 3073 int i; 3074 struct kvm_vcpu *vcpu; 3075 3076 kvm_for_each_vcpu(i, vcpu, kvm) { 3077 if (cpu == prev_cpu_of_kvm(vcpu)) { 3078 kvmppc_idle_hint_set(vcpu, value); 3079 } 3080 } 3081 } 3082 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org