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256154fb AD |
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); |