tree:   https://github.com/ammarfaizi2/linux-block google/android/kernel/common/deprecated/android-4.14-p-release
head:   0ca5d5ac9152d01b3494fb2efb5390319eb9904a
commit: 0b44afa099f8b65d21e5eec5e864f988b30e2099 [192/6167] ANDROID: power: wakeup_reason: add an API to log wakeup reasons
config: x86_64-randconfig-a013
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build):
        # https://github.com/ammarfaizi2/linux-block/commit/0b44afa099f8b65d21e5eec5e864f988b30e2099
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block google/android/kernel/common/deprecated/android-4.14-p-release
        git checkout 0b44afa099f8b65d21e5eec5e864f988b30e2099
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash LDFLAGS=-z max-page-size=0x200000  arch/x86/kernel/ kernel/power/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> kernel/power/wakeup_reason.c:108:12: warning: no previous declaration for 'wakeup_reason_init' [-Wmissing-declarations]
    int __init wakeup_reason_init(void)
               ^~~~~~~~~~~~~~~~~~


vim +/wakeup_reason_init +108 kernel/power/wakeup_reason.c

   104	
   105	/* Initializes the sysfs parameter
   106	 * registers the pm_event notifier
   107	 */
 > 108	int __init wakeup_reason_init(void)
   109	{
   110		int retval;
   111		spin_lock_init(&resume_reason_lock);
   112		retval = register_pm_notifier(&wakeup_reason_pm_notifier_block);
   113		if (retval)
   114			printk(KERN_WARNING "[%s] failed to register PM notifier %d\n",
   115					__func__, retval);
   116	
   117		wakeup_reason = kobject_create_and_add("wakeup_reasons", kernel_kobj);
   118		if (!wakeup_reason) {
   119			printk(KERN_WARNING "[%s] failed to create a sysfs kobject\n",
   120					__func__);
   121			return 1;
   122		}
   123		retval = sysfs_create_group(wakeup_reason, &attr_group);
   124		if (retval) {
   125			kobject_put(wakeup_reason);
   126			printk(KERN_WARNING "[%s] failed to create a sysfs group %d\n",
   127					__func__, retval);
   128		}
   129		return 0;
   130	}
   131	

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