tree: https://android.googlesource.com/kernel/common android-4.19 head: e7b509cf04859273495a2e87c136f6200556d593 commit: e7b509cf04859273495a2e87c136f6200556d593 [2/2] ANDROID: power: wakeup_reason: wake reason enhancements config: arm-randconfig-r025-20200521 (attached as .config) compiler: arm-linux-gnueabi-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 e7b509cf04859273495a2e87c136f6200556d593 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): kernel/power/wakeup_reason.c:199:6: warning: no previous prototype for '__log_abort_or_abnormal_wake' [-Wmissing-prototypes] 199 | void __log_abort_or_abnormal_wake(bool abort, const char *fmt, va_list args) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/power/wakeup_reason.c: In function '__log_abort_or_abnormal_wake': 213 | vsnprintf(non_irq_wake_reason, MAX_SUSPEND_ABORT_LEN, fmt, args); | ^~~~~~~~~ kernel/power/wakeup_reason.c: At top level: kernel/power/wakeup_reason.c:378:12: warning: no previous prototype for 'wakeup_reason_init' [-Wmissing-prototypes] 378 | int __init wakeup_reason_init(void) | ^~~~~~~~~~~~~~~~~~ vim +213 kernel/power/wakeup_reason.c 198 200 { 201 unsigned long flags; 202 203 spin_lock_irqsave(&wakeup_reason_lock, flags); 204 205 /* Suspend abort or abnormal wake reason has already been logged. */ 206 if (suspend_abort || abnormal_wake) { 207 spin_unlock_irqrestore(&wakeup_reason_lock, flags); 208 return; 209 } 210 211 suspend_abort = abort; 212 abnormal_wake = !abort; 214 215 spin_unlock_irqrestore(&wakeup_reason_lock, flags); 216 } 217 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org