CC: linux-kernel(a)vger.kernel.org TO: Nicholas Piggin <npiggin(a)gmail.com&gt; CC: Michael Ellerman <mpe(a)ellerman.id.au&gt; Hi Nicholas, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: e2da783614bb8930aa89753d3c3cd53d5604665d commit: 903dd1ff453e458fc7608ee4df42a6df16d3d1a0 powerpc/64e: remove 64s specific interrupt soft-mask code date: 3 months ago config: powerpc64-randconfig-r005-20210118 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project bfd75bdf3fd62d4f5e7028d4122f9ffa517f2a09) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 903dd1ff453e458fc7608ee4df42a6df16d3d1a0 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 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: error: arch/powerpc/built-in.a(kernel/exceptions-64e.o):(.text+0x22FE): unknown relocation (110) against symbol interrupt_base_book3e ld.lld: error: arch/powerpc/built-in.a(kernel/exceptions-64e.o):(.text+0x2316): unknown relocation (110) against symbol __end_interrupts ld.lld: error: arch/powerpc/built-in.a(kernel/exceptions-64e.o):(.text+0x248A): unknown relocation (110) against symbol interrupt_base_book3e ld.lld: error: arch/powerpc/built-in.a(kernel/exceptions-64e.o):(.text+0x24A2): unknown relocation (110) against symbol __end_interrupts ld.lld: error: undefined symbol: .early_setup --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org