X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=drivers%2Facpi%2Fevent.c;h=abec1ca94cf4bb4f54a387121c93168c944e7d9e;hb=022147242ff6e4b7ab770f00716063f48c088391;hp=5c95863f8fa9f324c0b98d88cd40f96eb16f9ead;hpb=95e3f66fa60a8e573b0b7a58305c5c9fcbca1b70;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c
index 5c95863f8fa..abec1ca94cf 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 */
+static 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 {