tree: https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git arm64/entry/rework head: c7071810c4aa3f59ecec504f7661d6cb8bb9b94f commit: 2385fe70b3e6e547015c0d144ace14505d573a75 [11/16] arm64: entry: convert SError handlers to C config: arm64-randconfig-r026-20210311 (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 2385fe70b3e6e547015c0d144ace14505d573a75 # 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_error_handler(struct pt_regs *regs) ^ arch/arm64/kernel/entry-common.c:286:12: 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_error_handler(struct pt_regs *regs) ^ arch/arm64/kernel/entry-common.c:490:12: 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 2 warnings generated. vim +/el1_error_handler +286 arch/arm64/kernel/entry-common.c 285 287 { 288 unsigned long esr = read_sysreg(esr_el1); 289 290 if (system_uses_irq_prio_masking()) 291 gic_write_pmr(GIC_PRIO_IRQON | GIC_PRIO_PSR_I_SET); 292 293 local_daif_restore(DAIF_ERRCTX); 294 do_serror(regs, esr); 295 } 296 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org