tree: https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git arm64/entry/rework head: c7071810c4aa3f59ecec504f7661d6cb8bb9b94f commit: c7071810c4aa3f59ecec504f7661d6cb8bb9b94f [16/16] arm64: entry: convert irq handlers to C config: arm64-randconfig-r014-20210311 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 574a9dabc63ba1e7a04c08d4bde2eacd61b44ce1) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git/commit/?id... git remote add mark-rutland https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git git fetch --no-tags mark-rutland arm64/entry/rework git checkout c7071810c4aa3f59ecec504f7661d6cb8bb9b94f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): asmlinkage void noinstr el1_irq_handler(struct pt_regs *regs) ^ arch/arm64/kernel/entry-common.c:346:12: note: declare 'static' if the function is not intended to be used outside of this translation unit asmlinkage void noinstr el1_irq_handler(struct pt_regs *regs) ^ static asmlinkage void noinstr el1_fiq_handler(struct pt_regs *regs) ^ arch/arm64/kernel/entry-common.c:351:12: note: declare 'static' if the function is not intended to be used outside of this translation unit asmlinkage void noinstr el1_fiq_handler(struct pt_regs *regs) ^ static arch/arm64/kernel/entry-common.c:356:25: warning: no previous prototype for function 'el1_error_handler' [-Wmissing-prototypes] asmlinkage void noinstr el1_error_handler(struct pt_regs *regs) ^ arch/arm64/kernel/entry-common.c:356:12: note: declare 'static' if the function is not intended to be used outside of this translation unit asmlinkage void noinstr el1_error_handler(struct pt_regs *regs) ^ static asmlinkage void noinstr el0_irq_handler(struct pt_regs *regs) ^ arch/arm64/kernel/entry-common.c:576:12: note: declare 'static' if the function is not intended to be used outside of this translation unit asmlinkage void noinstr el0_irq_handler(struct pt_regs *regs) ^ static asmlinkage void noinstr el0_fiq_handler(struct pt_regs *regs) ^ arch/arm64/kernel/entry-common.c:581:12: note: declare 'static' if the function is not intended to be used outside of this translation unit asmlinkage void noinstr el0_fiq_handler(struct pt_regs *regs) ^ static arch/arm64/kernel/entry-common.c:586:25: warning: no previous prototype for function 'el0_error_handler' [-Wmissing-prototypes] asmlinkage void noinstr el0_error_handler(struct pt_regs *regs) ^ arch/arm64/kernel/entry-common.c:586:12: note: declare 'static' if the function is not intended to be used outside of this translation unit asmlinkage void noinstr el0_error_handler(struct pt_regs *regs) ^ static 6 warnings generated. vim +/el1_irq_handler +346 arch/arm64/kernel/entry-common.c 345 347 { 348 el1_interrupt(regs, handle_arch_irq); 349 } 350 352 { 353 el1_interrupt(regs, handle_arch_fiq); 354 } 355 357 { 358 unsigned long esr = read_sysreg(esr_el1); 359 360 if (system_uses_irq_prio_masking()) 361 gic_write_pmr(GIC_PRIO_IRQON | GIC_PRIO_PSR_I_SET); 362 363 local_daif_restore(DAIF_ERRCTX); 364 do_serror(regs, esr); 365 } 366 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org