Hi Like, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on v5.10-rc2] [cannot apply to tip/perf/core tip/x86/core kvm/linux-next next-20201119] [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/Like-Xu/KVM-x86-pmu-Add-support-... base: 3cea11cd5e3b00d91caf0b4730194039b45c5891 config: i386-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/8f3b9b78565cf1dfaddddcf0afb38a4b5... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Like-Xu/KVM-x86-pmu-Add-support-to-enable-Guest-PEBS-via-DS/20201109-101957 git checkout 8f3b9b78565cf1dfaddddcf0afb38a4b57fd9b16 # save the attached .config to linux build tree make W=1 ARCH=i386 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 >>): 494 | void intel_pmu_handle_event(struct kvm_vcpu *vcpu) | ^~~~~~~~~~~~~~~~~~~~~~ vim +/intel_pmu_handle_event +494 arch/x86/kvm/vmx/pmu_intel.c 493 495 { 496 struct kvm_pmu *pmu = vcpu_to_pmu(vcpu); 497 498 if (!(pmu->global_ctrl & pmu->pebs_enable)) 499 return; 500 } 501 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org