Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfashe...

[sfrench/cifs-2.6.git] / drivers / acpi / event.c

diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c
index a2b9304596ce920596d29494421e9bf0163ca2f3..5479dc0eeeecdfe6401d0d81fd435af69ac67e42 100644 (file)
--- a/drivers/acpi/event.c
+++ b/drivers/acpi/event.c
@@ -109,6 +109,34 @@ static const struct file_operations acpi_system_event_ops = {
 };
 #endif /* CONFIG_ACPI_PROC_EVENT */
 
+/* ACPI notifier chain */
+BLOCKING_NOTIFIER_HEAD(acpi_chain_head);
+
+int acpi_notifier_call_chain(struct acpi_device *dev, u32 type, u32 data)
+{
+       struct acpi_bus_event event;
+
+       strcpy(event.device_class, dev->pnp.device_class);
+       strcpy(event.bus_id, dev->pnp.bus_id);
+       event.type = type;
+       event.data = data;
+       return (blocking_notifier_call_chain(&acpi_chain_head, 0, (void *)&event)
+                        == NOTIFY_BAD) ? -EINVAL : 0;
+}
+EXPORT_SYMBOL(acpi_notifier_call_chain);
+
+int register_acpi_notifier(struct notifier_block *nb)
+{
+       return blocking_notifier_chain_register(&acpi_chain_head, nb);
+}
+EXPORT_SYMBOL(register_acpi_notifier);
+
+int unregister_acpi_notifier(struct notifier_block *nb)
+{
+       return blocking_notifier_chain_unregister(&acpi_chain_head, nb);
+}
+EXPORT_SYMBOL(unregister_acpi_notifier);
+
 #ifdef CONFIG_NET
 static unsigned int acpi_event_seqnum;
 struct acpi_genl_event {
@@ -240,7 +268,7 @@ int acpi_bus_generate_netlink_event(const char *device_class,
        return 0;
 }
 
-EXPORT_SYMBOL(acpi_generate_netlink_event);
+EXPORT_SYMBOL(acpi_bus_generate_netlink_event);
 
 static int acpi_event_genetlink_init(void)
 {