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Linux/lib/pm-notifier-error-inject.c

  1 #include <linux/kernel.h>
  2 #include <linux/module.h>
  3 #include <linux/suspend.h>
  4 
  5 #include "notifier-error-inject.h"
  6 
  7 static int priority;
  8 module_param(priority, int, 0);
  9 MODULE_PARM_DESC(priority, "specify PM notifier priority");
 10 
 11 static struct notifier_err_inject pm_notifier_err_inject = {
 12         .actions = {
 13                 { NOTIFIER_ERR_INJECT_ACTION(PM_HIBERNATION_PREPARE) },
 14                 { NOTIFIER_ERR_INJECT_ACTION(PM_SUSPEND_PREPARE) },
 15                 { NOTIFIER_ERR_INJECT_ACTION(PM_RESTORE_PREPARE) },
 16                 {}
 17         }
 18 };
 19 
 20 static struct dentry *dir;
 21 
 22 static int err_inject_init(void)
 23 {
 24         int err;
 25 
 26         dir = notifier_err_inject_init("pm", notifier_err_inject_dir,
 27                                         &pm_notifier_err_inject, priority);
 28         if (IS_ERR(dir))
 29                 return PTR_ERR(dir);
 30 
 31         err = register_pm_notifier(&pm_notifier_err_inject.nb);
 32         if (err)
 33                 debugfs_remove_recursive(dir);
 34 
 35         return err;
 36 }
 37 
 38 static void err_inject_exit(void)
 39 {
 40         unregister_pm_notifier(&pm_notifier_err_inject.nb);
 41         debugfs_remove_recursive(dir);
 42 }
 43 
 44 module_init(err_inject_init);
 45 module_exit(err_inject_exit);
 46 
 47 MODULE_DESCRIPTION("PM notifier error injection module");
 48 MODULE_LICENSE("GPL");
 49 MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
 50 

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