tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 5fcb9628fd1227a5f11d87171cb1b8b5c414d9d9 commit: f0fe00d4972a8cd4b98cc2c29758615e4d51cdfe [1776/2089] security: allow using Clang's zero initialization for stack variables config: riscv-randconfig-r036-20200617 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 487ca07fcc75d52755c9fe2ee05bcb3b6eeeec44) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu git checkout f0fe00d4972a8cd4b98cc2c29758615e4d51cdfe # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv 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 >>, old ones prefixed by <<): clang-11: warning: argument unused during compilation: '-pg' [-Wunused-command-line-argument] -- clang-11: warning: argument unused during compilation: '-pg' [-Wunused-command-line-argument] clang-11: warning: argument unused during compilation: '-no-pie' [-Wunused-command-line-argument] --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org