tree: https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git cet/kvm head: e2f9808bd7530f44cd5d95332036bb660b66b8db commit: 987299ad58376fc09a3bc884b55c07c2e5d80245 [32/49] x86/cet/shstk: Introduce map_shadow_stack syscall config: hexagon-buildonly-randconfig-r005-20220216 (https://download.01.org/0day-ci/archive/20220217/202202171218.HfuxKGxm-lk...) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 0bad7cb56526f2572c74449fcf97c1fcda42b41d) 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/rppt/linux.git/commit/?id... git remote add rppt https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git git fetch --no-tags rppt cet/kvm git checkout 987299ad58376fc09a3bc884b55c07c2e5d80245 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon prepare 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 >>): <stdin>:1517:2: warning: syscall clone3 not implemented [-W#warnings] #warning syscall clone3 not implemented ^ #warning syscall map_shadow_stack not implemented ^ 2 warnings generated. -- <stdin>:1517:2: warning: syscall clone3 not implemented [-W#warnings] #warning syscall clone3 not implemented ^ #warning syscall map_shadow_stack not implemented ^ 2 warnings generated. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org