[kbuild-all] ld.lld: error: undefined symbol: kb_cs

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 24085f70a6e1b0cb647ec92623284641d8270637 commit: 5990cdee689c6885b27c6d969a3d58b09002b0bc lib/mpi: Fix building for powerpc with clang date: 3 weeks ago config: powerpc-randconfig-r034-20200514 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 310d32cb80a611e6384a921e85607fea05841f26) reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu git checkout 5990cdee689c6885b27c6d969a3d58b09002b0bc # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): -- --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org