diff options
Diffstat (limited to 'kernel/reboot.c')
| -rw-r--r-- | kernel/reboot.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/kernel/reboot.c b/kernel/reboot.c index bd30a973fe94..e4ced883d8de 100644 --- a/kernel/reboot.c +++ b/kernel/reboot.c @@ -104,6 +104,33 @@ int unregister_reboot_notifier(struct notifier_block *nb) } EXPORT_SYMBOL(unregister_reboot_notifier); +static void devm_unregister_reboot_notifier(struct device *dev, void *res) +{ + WARN_ON(unregister_reboot_notifier(*(struct notifier_block **)res)); +} + +int devm_register_reboot_notifier(struct device *dev, struct notifier_block *nb) +{ + struct notifier_block **rcnb; + int ret; + + rcnb = devres_alloc(devm_unregister_reboot_notifier, + sizeof(*rcnb), GFP_KERNEL); + if (!rcnb) + return -ENOMEM; + + ret = register_reboot_notifier(nb); + if (!ret) { + *rcnb = nb; + devres_add(dev, rcnb); + } else { + devres_free(rcnb); + } + + return ret; +} +EXPORT_SYMBOL(devm_register_reboot_notifier); + /* * Notifier list for kernel code which wants to be called * to restart the system. |