tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: ea586a076e8aa606c59b66d86660590f18354b11 commit: 6f5d248d05db9c4991366154f1a657a630faa583 [4461/9897] ARM: iop32x: use GENERIC_IRQ_MULTI_HANDLER config: arm-randconfig-r031-20220101 (https://download.01.org/0day-ci/archive/20220102/202201020627.cJMyevvZ-lkp@xxxxxxxxx/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c054402170cd8466683a20385befc0523aba3359) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=6f5d248d05db9c4991366154f1a657a630faa583 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 6f5d248d05db9c4991366154f1a657a630faa583 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> arch/arm/mach-iop32x/irq.c:62:6: warning: no previous prototype for function 'iop_handle_irq' [-Wmissing-prototypes] void iop_handle_irq(struct pt_regs *regs) ^ arch/arm/mach-iop32x/irq.c:62:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void iop_handle_irq(struct pt_regs *regs) ^ static 1 warning generated. -- >> arch/arm/mach-iop32x/cp6.c:10:6: warning: no previous prototype for function 'iop_enable_cp6' [-Wmissing-prototypes] void iop_enable_cp6(void) ^ arch/arm/mach-iop32x/cp6.c:10:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void iop_enable_cp6(void) ^ static arch/arm/mach-iop32x/cp6.c:43:13: warning: no previous prototype for function 'iop_init_cp6_handler' [-Wmissing-prototypes] void __init iop_init_cp6_handler(void) ^ arch/arm/mach-iop32x/cp6.c:43:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init iop_init_cp6_handler(void) ^ static 2 warnings generated. vim +/iop_handle_irq +62 arch/arm/mach-iop32x/irq.c 61 > 62 void iop_handle_irq(struct pt_regs *regs) 63 { 64 u32 mask; 65 66 iop_enable_cp6(); 67 68 do { 69 mask = iintsrc_read(); 70 if (mask) 71 generic_handle_irq(fls(mask)); 72 } while (mask); 73 } 74 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx