TO: Josh Poimboeuf <jpoimboe(a)redhat.com&gt; Hi Josh, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/jpoimboe/linux.git objtool-crypto head: 3a890050891f8ee84d05a00107797c0f729143c5 commit: 3a890050891f8ee84d05a00107797c0f729143c5 [11/11] x86/crypto: Enable objtool in crypto code config: x86_64-randconfig-a013-20210218 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/jpoimboe/linux.git/commit... git remote add jpoimboe https://git.kernel.org/pub/scm/linux/kernel/git/jpoimboe/linux.git git fetch --no-tags jpoimboe objtool-crypto git checkout 3a890050891f8ee84d05a00107797c0f729143c5 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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 >>): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org