Hi Quentin, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on kvmarm/next] [also build test WARNING on next-20210319] [cannot apply to arm64/for-next/core linux/master linus/master v5.12-rc3] [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/Quentin-Perret/KVM-arm64-Stage-2... base: https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git next config: arm64-randconfig-r036-20210318 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project fcc1ce00931751ac02498986feb37744e9ace8de) 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/13c19fdd5d9a500493f95ddb3b57f0b1c... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Quentin-Perret/KVM-arm64-Stage-2-for-the-host/20210319-180524 git checkout 13c19fdd5d9a500493f95ddb3b57f0b1c6d749da # 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 >>): void _kvm_host_prot_finalize(void *discard) ^ arch/arm64/kvm/arm.c:1897:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void _kvm_host_prot_finalize(void *discard) ^ static 1 warning generated. vim +/_kvm_host_prot_finalize +1897 arch/arm64/kvm/arm.c 1896 1898 { 1899 WARN_ON(kvm_call_hyp_nvhe(__pkvm_prot_finalize)); 1900 } 1901 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org