tree: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/misc head: 839157876f97fcc7ead0b62c9377bb50f75a3df9 commit: ef9c5d09797db874a29a97407c3ea3990210432b [13/14] arm64/sve: Remove redundant system_supports_sve() tests config: arm64-randconfig-r036-20210414 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9829f5e6b1bca9b61efc629770d28bb9014dec45) 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/arm64/linux.git/commit/?id=ef9c5d09797db874a29a97407c3ea3990210432b git remote add arm64 https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git git fetch --no-tags arm64 for-next/misc git checkout ef9c5d09797db874a29a97407c3ea3990210432b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): >> ld.lld: error: undefined symbol: sve_get_vl >>> referenced by fpsimd.c >>> kernel/fpsimd.o:(fpsimd_save) in archive arch/arm64/built-in.a -- >> ld.lld: error: undefined symbol: sve_save_state >>> referenced by fpsimd.c >>> kernel/fpsimd.o:(fpsimd_save) in archive arch/arm64/built-in.a -- >> ld.lld: error: undefined symbol: sve_load_state >>> referenced by fpsimd.c >>> kernel/fpsimd.o:(task_fpsimd_load) in archive arch/arm64/built-in.a --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org