Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target...
[platform/kernel/linux-rpi.git] / lib / memory-notifier-error-inject.c
1 #include <linux/kernel.h>
2 #include <linux/module.h>
3 #include <linux/memory.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 memory notifier priority");
10
11 static struct notifier_err_inject memory_notifier_err_inject = {
12         .actions = {
13                 { NOTIFIER_ERR_INJECT_ACTION(MEM_GOING_ONLINE) },
14                 { NOTIFIER_ERR_INJECT_ACTION(MEM_GOING_OFFLINE) },
15                 {}
16         }
17 };
18
19 static struct dentry *dir;
20
21 static int err_inject_init(void)
22 {
23         int err;
24
25         dir = notifier_err_inject_init("memory", notifier_err_inject_dir,
26                                         &memory_notifier_err_inject, priority);
27         if (IS_ERR(dir))
28                 return PTR_ERR(dir);
29
30         err = register_memory_notifier(&memory_notifier_err_inject.nb);
31         if (err)
32                 debugfs_remove_recursive(dir);
33
34         return err;
35 }
36
37 static void err_inject_exit(void)
38 {
39         unregister_memory_notifier(&memory_notifier_err_inject.nb);
40         debugfs_remove_recursive(dir);
41 }
42
43 module_init(err_inject_init);
44 module_exit(err_inject_exit);
45
46 MODULE_DESCRIPTION("memory notifier error injection module");
47 MODULE_LICENSE("GPL");
48 MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");