tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git pending-5.4 head: 4dd560ad547135a0061e77f42acb9cfa6876ec11 commit: a028e9b2c608128560daa4ae7a27413b87c04963 [205/211] powerpc: handle kdump appropriately with crash_kexec_post_notifiers option config: powerpc64-randconfig-r005-20220123 (https://download.01.org/0day-ci/archive/20220124/202201241854.zrhou0mM-lk...) compiler: powerpc64-linux-gcc (GCC) 11.2.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/c... git remote add sashal-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-stable pending-5.4 git checkout a028e9b2c608128560daa4ae7a27413b87c04963 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash 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 >>): arch/powerpc/kernel/smp.c:539:6: error: no previous prototype for 'tick_broadcast' [-Werror=missing-prototypes] 539 | void tick_broadcast(const struct cpumask *mask) | ^~~~~~~~~~~~~~ arch/powerpc/kernel/smp.c:549:6: error: no previous prototype for 'debugger_ipi_callback' [-Werror=missing-prototypes] 549 | void debugger_ipi_callback(struct pt_regs *regs) | ^~~~~~~~~~~~~~~~~~~~~ 599 | void crash_smp_send_stop(void) | ^~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors vim +/crash_smp_send_stop +599 arch/powerpc/kernel/smp.c 598 600 { 601 static bool stopped = false; 602 603 if (stopped) 604 return; 605 606 stopped = true; 607 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org