Commit | Line | Data |
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c9d221f8 | 1 | #include <linux/kernel.h> |
c9d221f8 | 2 | #include <linux/module.h> |
f5a9f52e | 3 | #include <linux/cpu.h> |
c9d221f8 | 4 | |
f5a9f52e | 5 | #include "notifier-error-inject.h" |
c9d221f8 | 6 | |
f5a9f52e | 7 | static int priority; |
c9d221f8 AM |
8 | module_param(priority, int, 0); |
9 | MODULE_PARM_DESC(priority, "specify cpu notifier priority"); | |
10 | ||
f5a9f52e AM |
11 | static struct notifier_err_inject cpu_notifier_err_inject = { |
12 | .actions = { | |
13 | { NOTIFIER_ERR_INJECT_ACTION(CPU_UP_PREPARE) }, | |
14 | { NOTIFIER_ERR_INJECT_ACTION(CPU_UP_PREPARE_FROZEN) }, | |
15 | { NOTIFIER_ERR_INJECT_ACTION(CPU_DOWN_PREPARE) }, | |
16 | { NOTIFIER_ERR_INJECT_ACTION(CPU_DOWN_PREPARE_FROZEN) }, | |
17 | {} | |
c9d221f8 | 18 | } |
c9d221f8 AM |
19 | }; |
20 | ||
f5a9f52e AM |
21 | static struct dentry *dir; |
22 | ||
c9d221f8 AM |
23 | static int err_inject_init(void) |
24 | { | |
f5a9f52e AM |
25 | int err; |
26 | ||
27 | dir = notifier_err_inject_init("cpu", notifier_err_inject_dir, | |
28 | &cpu_notifier_err_inject, priority); | |
29 | if (IS_ERR(dir)) | |
30 | return PTR_ERR(dir); | |
31 | ||
32 | err = register_hotcpu_notifier(&cpu_notifier_err_inject.nb); | |
33 | if (err) | |
34 | debugfs_remove_recursive(dir); | |
c9d221f8 | 35 | |
f5a9f52e | 36 | return err; |
c9d221f8 AM |
37 | } |
38 | ||
39 | static void err_inject_exit(void) | |
40 | { | |
f5a9f52e AM |
41 | unregister_hotcpu_notifier(&cpu_notifier_err_inject.nb); |
42 | debugfs_remove_recursive(dir); | |
c9d221f8 AM |
43 | } |
44 | ||
45 | module_init(err_inject_init); | |
46 | module_exit(err_inject_exit); | |
47 | ||
48 | MODULE_DESCRIPTION("CPU notifier error injection module"); | |
49 | MODULE_LICENSE("GPL"); | |
50 | MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>"); |