tree: https://github.com/intel/tdx.git kvm-upstream-workaround head: 8dfa492341b8e8ba1c9dc534dd55565adc1b0ac0 commit: 1942310bc36276289fa54bb8d077c394078c4b15 [111/144] KVM: TDX: Add methods to ignore accesses to CPU state config: x86_64-randconfig-a014 (https://download.01.org/0day-ci/archive/20220211/202202112353.bT0JdIv7-lk...) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project f6685f774697c85d6a352dcea013f46a99f9fe31) 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/intel/tdx/commit/1942310bc36276289fa54bb8d077c394078c4b15 git remote add intel-tdx https://github.com/intel/tdx.git git fetch --no-tags intel-tdx kvm-upstream-workaround git checkout 1942310bc36276289fa54bb8d077c394078c4b15 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kvm/ 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 >>): void tdx_vm_teardown(struct kvm *kvm) {} ^ arch/x86/kvm/vmx/tdx_stubs.c:14:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void tdx_vm_teardown(struct kvm *kvm) {} ^ static arch/x86/kvm/vmx/tdx_stubs.c:38:5: warning: no previous prototype for function 'tdx_deliver_posted_interrupt' [-Wmissing-prototypes] int tdx_deliver_posted_interrupt(struct kvm_vcpu *vcpu, int vector) { return 0; } ^ arch/x86/kvm/vmx/tdx_stubs.c:38:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int tdx_deliver_posted_interrupt(struct kvm_vcpu *vcpu, int vector) { return 0; } ^ static 2 warnings generated. vim +/tdx_vm_teardown +14 arch/x86/kvm/vmx/tdx_stubs.c 12 13 int tdx_vm_init(struct kvm *kvm) { return -EOPNOTSUPP; } 15 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org