tree: https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git arm64/irq-fixes head: 278d20981fcfbd2d156d691ba375de1b3ca0e1a6 commit: 278d20981fcfbd2d156d691ba375de1b3ca0e1a6 [3/3] WIP: arm64: entry: fix EL0 context tracking vs irq flag tracing config: arm64-randconfig-r003-20201118 (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 # 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/irq-fixes git checkout 278d20981fcfbd2d156d691ba375de1b3ca0e1a6 # 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:76:25: warning: no previous prototype for 'el1_sync_handler' [-Wmissing-prototypes] 76 | asmlinkage void notrace el1_sync_handler(struct pt_regs *regs) | ^~~~~~~~~~~~~~~~ 120 | asmlinkage void notrace exit_to_user_mode(void) | ^~~~~~~~~~~~~~~~~ arch/arm64/kernel/entry-common.c:253:25: warning: no previous prototype for 'el0_sync_handler' [-Wmissing-prototypes] 253 | asmlinkage void notrace el0_sync_handler(struct pt_regs *regs) | ^~~~~~~~~~~~~~~~ arch/arm64/kernel/entry-common.c:326:25: warning: no previous prototype for 'el0_sync_compat_handler' [-Wmissing-prototypes] 326 | asmlinkage void notrace el0_sync_compat_handler(struct pt_regs *regs) | ^~~~~~~~~~~~~~~~~~~~~~~ vim +/exit_to_user_mode +120 arch/arm64/kernel/entry-common.c 119 121 { 122 trace_hardirqs_on_prepare(); 123 lockdep_hardirqs_on_prepare(CALLER_ADDR0); 124 user_enter_irqoff(); 125 lockdep_hardirqs_on(CALLER_ADDR0); 126 } 127 NOKPROBE_SYMBOL(exit_to_user_mode) 128 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org