tree: https://git.linaro.org/people/vincent.guittot/kernel.git test/scheduler head: 1e5360db16325edbc2b5afcd085644615a12b0a8 commit: 870213e345cbcfecdacc95c0d9e41fbd6e44070b [6/7] sched/fair: trigger the update of blocked load on newly idle cpu config: arm-randconfig-r001-20210209 (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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi git remote add vincent.guittot https://git.linaro.org/people/vincent.guittot/kernel.git git fetch --no-tags vincent.guittot test/scheduler git checkout 870213e345cbcfecdacc95c0d9e41fbd6e44070b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang 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 >>): 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