tree: https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git wip-blake2b head: 855379d0b77aec7b125611b2b1a6cb6693c8c4a1 commit: 855379d0b77aec7b125611b2b1a6cb6693c8c4a1 [5/5] crypto: arm/blake2b - add NEON-optimized BLAKE2b implementation config: arm-allmodconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 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/ebiggers/linux.git/commit... git remote add ebiggers https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git git fetch --no-tags ebiggers wip-blake2b git checkout 855379d0b77aec7b125611b2b1a6cb6693c8c4a1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>, old ones prefixed by <<): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org