tree: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next-test head: 5811244192fc4e18c001c69300044c2acf30bd91 commit: 053d58c870298d62b9c5154672ef2f1684c4ea43 [68/159] powerpc/amigaone: Move PHB discovery config: powerpc64-randconfig-r036-20210209 (attached as .config) compiler: powerpc-linux-gcc (GCC) 9.3.0 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/powerpc/linux.git/commit/... git remote add powerpc https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git git fetch --no-tags powerpc next-test git checkout 053d58c870298d62b9c5154672ef2f1684c4ea43 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 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 >>): arch/powerpc/platforms/amigaone/setup.c:27:6: error: no previous prototype for 'amigaone_show_cpuinfo' [-Werror=missing-prototypes] 27 | void amigaone_show_cpuinfo(struct seq_file *m) | ^~~~~~~~~~~~~~~~~~~~~ arch/powerpc/platforms/amigaone/setup.c:67:13: error: no previous prototype for 'amigaone_setup_arch' [-Werror=missing-prototypes] 67 | void __init amigaone_setup_arch(void) | ^~~~~~~~~~~~~~~~~~~ 73 | void __init amigaone_discover_phbs(void) | ^~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/platforms/amigaone/setup.c:85:13: error: no previous prototype for 'amigaone_init_IRQ' [-Werror=missing-prototypes] 85 | void __init amigaone_init_IRQ(void) | ^~~~~~~~~~~~~~~~~ arch/powerpc/platforms/amigaone/setup.c:125:17: error: no previous prototype for 'amigaone_restart' [-Werror=missing-prototypes] 125 | void __noreturn amigaone_restart(char *cmd) | ^~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors vim +/amigaone_discover_phbs +73 arch/powerpc/platforms/amigaone/setup.c 72 74 { 75 struct device_node *np; 76 int phb = -ENODEV; 77 78 /* Lookup PCI host bridges. */ 79 for_each_compatible_node(np, "pci", "mai-logic,articia-s") 80 phb = amigaone_add_bridge(np); 81 82 BUG_ON(phb != 0); 83 } 84 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org