Hi David, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: dfa377c35d70c31139b1274ec49f87d380996c42 commit: cdf367192766ad11a03e8d5098556be43b8eb6b0 KVM: arm64: Intercept host's CPU_ON SMCs date: 8 months ago config: arm64-randconfig-r024-20210814 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 1f7b25ea76a925aca690da28de9d78db7ca99d0c) 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://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 cdf367192766ad11a03e8d5098556be43b8eb6b0 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 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 >>): asmlinkage void __noreturn kvm_host_psci_cpu_entry(bool is_cpu_on) ^ arch/arm64/kvm/hyp/nvhe/psci-relay.c:174:12: note: declare 'static' if the function is not intended to be used outside of this translation unit asmlinkage void __noreturn kvm_host_psci_cpu_entry(bool is_cpu_on) ^ static 1 warning generated. vim +/kvm_host_psci_cpu_entry +174 arch/arm64/kvm/hyp/nvhe/psci-relay.c 173 175 { 176 struct psci_boot_args *boot_args; 177 struct kvm_cpu_context *host_ctxt; 178 179 host_ctxt = &this_cpu_ptr(hyp_symbol_addr(kvm_host_data))->host_ctxt; 180 boot_args = this_cpu_ptr(hyp_symbol_addr(cpu_on_args)); 181 182 cpu_reg(host_ctxt, 0) = boot_args->r0; 183 write_sysreg_el2(boot_args->pc, SYS_ELR); 184 release_boot_args(boot_args); 185 186 __host_enter(host_ctxt); 187 } 188 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org