Hi David, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on dennis-percpu/for-next] [also build test WARNING on linus/master v5.10-rc3 next-20201109] [cannot apply to kvmarm/next arm64/for-next/core soc/for-next arm/for-next xlnx/master] [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/David-Brazdil/Opt-in-always-on-nVHE-hypervisor/20201109-193833 base: https://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu.git for-next config: arm64-randconfig-r022-20201109 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 09ec07827b1128504457a93dee80b2ceee1af600) 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://github.com/0day-ci/linux/commit/a59ab708ed6039e83756720b1d5974e84db5a8f4 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review David-Brazdil/Opt-in-always-on-nVHE-hypervisor/20201109-193833 git checkout a59ab708ed6039e83756720b1d5974e84db5a8f4 # 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@xxxxxxxxx> All warnings (new ones prefixed by >>): >> arch/arm64/kvm/arm.c:1875:13: warning: no previous prototype for function 'kvm_patch_hcr_flags' [-Wmissing-prototypes] void __init kvm_patch_hcr_flags(struct alt_instr *alt, ^ arch/arm64/kvm/arm.c:1875:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init kvm_patch_hcr_flags(struct alt_instr *alt, ^ static 1 warning generated. vim +/kvm_patch_hcr_flags +1875 arch/arm64/kvm/arm.c 1874 > 1875 void __init kvm_patch_hcr_flags(struct alt_instr *alt, 1876 __le32 *origptr, __le32 *updptr, int nr_inst) 1877 { 1878 int i; 1879 u32 rd; 1880 1881 BUG_ON(nr_inst != 4); 1882 1883 /* Skip for VHE and unprotected nVHE modes. */ 1884 if (!is_kvm_protected_mode()) 1885 return; 1886 1887 rd = aarch64_insn_decode_register(AARCH64_INSN_REGTYPE_RD, 1888 le32_to_cpu(origptr[0])); 1889 1890 for (i = 0; i < nr_inst; i++) { 1891 u32 oinsn = __gen_mov_hcr_insn(HCR_HOST_NVHE_FLAGS, rd, i); 1892 u32 insn = __gen_mov_hcr_insn(HCR_HOST_NVHE_PROTECTED_FLAGS, rd, i); 1893 1894 BUG_ON(oinsn != le32_to_cpu(origptr[i])); 1895 updptr[i] = cpu_to_le32(insn); 1896 } 1897 } 1898 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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