1 /*
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
16 static 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 */
22 int fb_register_client(struct notifier_block *nb)
23 {
24 return blocking_notifier_chain_register(&fb_notifier_list, nb);
25 }
26 EXPORT_SYMBOL(fb_register_client);
27
28 /**
29 * fb_unregister_client - unregister a client notifier
30 * @nb: notifier block to callback on events
31 */
32 int fb_unregister_client(struct notifier_block *nb)
33 {
34 return blocking_notifier_chain_unregister(&fb_notifier_list, nb);
35 }
36 EXPORT_SYMBOL(fb_unregister_client);
37
38 /**
39 * fb_notifier_call_chain - notify clients of fb_events
40 *
41 */
42 int fb_notifier_call_chain(unsigned long val, void *v)
43 {
44 return blocking_notifier_call_chain(&fb_notifier_list, val, v);
45 }
46 EXPORT_SYMBOL_GPL(fb_notifier_call_chain);
47
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