tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: c8c109546a19613d323a319d0c921cb1f317e629 commit: 760849b1476c94da4cca5d3a5f0a1f64ffc92ba4 KVM: x86: Make sure KVM_CPUID_FEATURES really are KVM_CPUID_FEATURES date: 3 days ago config: i386-buildonly-randconfig-r003-20211111 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 760849b1476c94da4cca5d3a5f0a1f64ffc92ba4 # 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 errors (new ones prefixed by >>): 128 | struct kvm_cpuid_entry2 *kvm_find_kvm_cpuid_features(struct kvm_vcpu *vcpu) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors vim +/kvm_find_kvm_cpuid_features +128 arch/x86/kvm/cpuid.c 127 129 { 130 u32 base = vcpu->arch.kvm_cpuid_base; 131 132 if (!base) 133 return NULL; 134 135 return kvm_find_cpuid_entry(vcpu, base | KVM_CPUID_FEATURES, 0); 136 } 137 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org