X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Facpi%2Fevent.c;h=5479dc0eeeecdfe6401d0d81fd435af69ac67e42;hb=9ee85241fdaab358dff1d8647f20a478cfa512a1;hp=5c95863f8fa9f324c0b98d88cd40f96eb16f9ead;hpb=ba5e1223422368fd2f4dbb0745f5fbb5fe9a65f1;p=safe%2Fjmp%2Flinux-2.6

diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c
index 5c95863..5479dc0 100644
--- 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 {