tree: https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git arm64/entry-deasm-new head: 7813d186a62c0961d31b574c38f7e4f47eeae661 commit: 9c8b9f30af29f541918d9775099fdf72468d89a2 [13/15] arm64: convert error entry to C config: arm64-allyesconfig (attached as .config) compiler: aarch64-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 git checkout 9c8b9f30af29f541918d9775099fdf72468d89a2 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 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 >>): arch/arm64/kernel/entry-common.c:71:25: warning: no previous prototype for 'el1_sync_handler' [-Wmissing-prototypes] 71 | asmlinkage void notrace el1_sync_handler(struct pt_regs *regs) | ^~~~~~~~~~~~~~~~ arch/arm64/kernel/entry-common.c:226:25: warning: no previous prototype for 'el0_sync_handler' [-Wmissing-prototypes] 226 | asmlinkage void notrace el0_sync_handler(struct pt_regs *regs) | ^~~~~~~~~~~~~~~~ arch/arm64/kernel/entry-common.c:292:25: warning: no previous prototype for 'el0_sync_compat_handler' [-Wmissing-prototypes] 292 | asmlinkage void notrace el0_sync_compat_handler(struct pt_regs *regs) | ^~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kernel/entry-common.c:366:25: warning: no previous prototype for 'el1_irq_handler' [-Wmissing-prototypes] 366 | asmlinkage void notrace el1_irq_handler(struct pt_regs *regs) | ^~~~~~~~~~~~~~~ arch/arm64/kernel/entry-common.c:384:25: warning: no previous prototype for 'el0_irq_handler' [-Wmissing-prototypes] 384 | asmlinkage void notrace el0_irq_handler(struct pt_regs *regs) | ^~~~~~~~~~~~~~~ 395 | asmlinkage void el1_error_handler(struct pt_regs *regs) | ^~~~~~~~~~~~~~~~~ 404 | asmlinkage void el0_error_handler(struct pt_regs *regs) | ^~~~~~~~~~~~~~~~~ vim +/el1_error_handler +395 arch/arm64/kernel/entry-common.c 394 396 { 397 unsigned long esr = read_sysreg(esr_el1); 398 399 local_daif_restore(DAIF_ERRCTX); 400 do_serror(regs, esr); 401 } 402 NOKPROBE_SYMBOL(el1_error_handler); 403 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org