tree: https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git arm-kill-set_fs-9 head: bcf8e15e3fec04a10e29924e173823d3d6d53674 commit: db4a48a05b16b79c140f2615343933d219e6264f [6/9] ARM: oabi-compat: rework sys_semtimedop emulation config: arm-randconfig-r021-20210721 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project c781eb153bfbd1b52b03efe34f56bbeccbb8aba6) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git/commit/?id=db... git remote add soc https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git git fetch --no-tags soc arm-kill-set_fs-9 git checkout db4a48a05b16b79c140f2615343933d219e6264f # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=arm SHELL=/bin/bash 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 >>): ld.lld: warning: lld uses blx instruction, no object with architecture supporting feature detected ld.lld: warning: lld uses blx instruction, no object with architecture supporting feature detected --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org