blob: 8c020389e4fa96c31e07b8cf5c45af5f41e8136e [file] [log] [blame]
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001/*
2 * linux/drivers/video/fb_notify.c
3 *
4 * Copyright (C) 2006 Antonino Daplas <adaplas@pol.net>
5 *
6 * 2001 - Documented with DocBook
7 * - Brad Douglas <brad@neruo.com>
8 *
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file COPYING in the main directory of this archive
11 * for more details.
12 */
13#include <linux/fb.h>
14#include <linux/notifier.h>
15
16static BLOCKING_NOTIFIER_HEAD(fb_notifier_list);
17
18/**
19 * fb_register_client - register a client notifier
20 * @nb: notifier block to callback on events
21 */
22int fb_register_client(struct notifier_block *nb)
23{
24 return blocking_notifier_chain_register(&fb_notifier_list, nb);
25}
26EXPORT_SYMBOL(fb_register_client);
27
28/**
29 * fb_unregister_client - unregister a client notifier
30 * @nb: notifier block to callback on events
31 */
32int fb_unregister_client(struct notifier_block *nb)
33{
34 return blocking_notifier_chain_unregister(&fb_notifier_list, nb);
35}
36EXPORT_SYMBOL(fb_unregister_client);
37
38/**
39 * fb_notifier_call_chain - notify clients of fb_events
40 *
41 */
42int fb_notifier_call_chain(unsigned long val, void *v)
43{
44 return blocking_notifier_call_chain(&fb_notifier_list, val, v);
45}
46EXPORT_SYMBOL_GPL(fb_notifier_call_chain);