[kbuild-all] [linux-next:master 10163/12085] arch/arm64/kvm/hyp/nvhe/psci-relay.c:174:28: warning: no previous prototype for function 'kvm_host_psci_cpu_entry'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 2f1d5c77f13fe64497c2e2601605f7d7ec4da9b1 commit: cdf367192766ad11a03e8d5098556be43b8eb6b0 [10163/12085] KVM: arm64: Intercept host's CPU_ON SMCs config: arm64-randconfig-r032-20201209 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 1968804ac726e7674d5de22bc2204b45857da344) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next 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