diff options
Diffstat (limited to 'drivers/video/fbdev/fb_notify.c')
-rw-r--r-- | drivers/video/fbdev/fb_notify.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/video/fbdev/fb_notify.c b/drivers/video/fbdev/fb_notify.c new file mode 100644 index 000000000000..74c2da528884 --- /dev/null +++ b/drivers/video/fbdev/fb_notify.c | |||
@@ -0,0 +1,47 @@ | |||
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 | #include <linux/export.h> | ||
16 | |||
17 | static BLOCKING_NOTIFIER_HEAD(fb_notifier_list); | ||
18 | |||
19 | /** | ||
20 | * fb_register_client - register a client notifier | ||
21 | * @nb: notifier block to callback on events | ||
22 | */ | ||
23 | int fb_register_client(struct notifier_block *nb) | ||
24 | { | ||
25 | return blocking_notifier_chain_register(&fb_notifier_list, nb); | ||
26 | } | ||
27 | EXPORT_SYMBOL(fb_register_client); | ||
28 | |||
29 | /** | ||
30 | * fb_unregister_client - unregister a client notifier | ||
31 | * @nb: notifier block to callback on events | ||
32 | */ | ||
33 | int fb_unregister_client(struct notifier_block *nb) | ||
34 | { | ||
35 | return blocking_notifier_chain_unregister(&fb_notifier_list, nb); | ||
36 | } | ||
37 | EXPORT_SYMBOL(fb_unregister_client); | ||
38 | |||
39 | /** | ||
40 | * fb_notifier_call_chain - notify clients of fb_events | ||
41 | * | ||
42 | */ | ||
43 | int fb_notifier_call_chain(unsigned long val, void *v) | ||
44 | { | ||
45 | return blocking_notifier_call_chain(&fb_notifier_list, val, v); | ||
46 | } | ||
47 | EXPORT_SYMBOL_GPL(fb_notifier_call_chain); | ||