tree: https://git.kernel.org/pub/scm/linux/kernel/git/geoff/ps3-linux.git ps3-queue head: 2adf05b3045d10e1cd25d8db99608f4c77482caf commit: 89d4e3c1761b6f437a2c50cd04470068ba59ade9 [6/14] ps3-debugging: Setup DABR register config: powerpc-randconfig-r023-20210315 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project a28facba1ccdc957f386b7753f4958307f1bfde8) 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 powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/geoff/ps3-linux.git/commi... git remote add ps3 https://git.kernel.org/pub/scm/linux/kernel/git/geoff/ps3-linux.git git fetch --no-tags ps3 ps3-queue git checkout 89d4e3c1761b6f437a2c50cd04470068ba59ade9 # 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: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): void do_break (struct pt_regs *regs, unsigned long address, ^ arch/powerpc/kernel/process.c:675:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void do_break (struct pt_regs *regs, unsigned long address, ^ static 1 error generated. vim +/do_break +675 arch/powerpc/kernel/process.c 674 676 unsigned long error_code) 677 { 678 current->thread.trap_nr = TRAP_HWBKPT; 679 if (notify_die(DIE_DABR_MATCH, "dabr_match", regs, error_code, 680 11, SIGSEGV) == NOTIFY_STOP) 681 return; 682 683 if (debugger_break_match(regs)) 684 return; 685 686 /* 687 * We reach here only when watchpoint exception is generated by ptrace 688 * event (or hw is buggy!). Now if CONFIG_HAVE_HW_BREAKPOINT is set, 689 * watchpoint is already handled by hw_breakpoint_handler() so we don't 690 * have to do anything. But when CONFIG_HAVE_HW_BREAKPOINT is not set, 691 * we need to manually handle the watchpoint here. 692 */ 693 if (!IS_ENABLED(CONFIG_HAVE_HW_BREAKPOINT)) 694 do_break_handler(regs); 695 696 /* Deliver the signal to userspace */ 697 force_sig_fault(SIGTRAP, TRAP_HWBKPT, (void __user *)address); 698 } 699 #endif /* CONFIG_PPC_ADV_DEBUG_REGS */ 700 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org