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author | Antonino A. Daplas <adaplas@gmail.com> | 2006-07-30 03:04:17 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-31 13:28:44 -0700 |
commit | 256154fbc31c25a8df4d398232acfa9d4892224c (patch) | |
tree | 278582add1a28766a1f3f4dba2f250cdbb191e0a /drivers/video/fb_notify.c | |
parent | 834a9b8ca7a01c34570be021f88e18884a29f048 (diff) | |
download | kernel_samsung_smdk4412-256154fbc31c25a8df4d398232acfa9d4892224c.zip kernel_samsung_smdk4412-256154fbc31c25a8df4d398232acfa9d4892224c.tar.gz kernel_samsung_smdk4412-256154fbc31c25a8df4d398232acfa9d4892224c.tar.bz2 |
[PATCH] fbdev: statically link the framebuffer notification functions
The backlight and lcd subsystems can be notified by the framebuffer layer
of blanking events. However, these subsystems, as a whole, can function
independently from the framebuffer layer. But in order to enable to the
lcd and backlight subsystems, the framebuffer has to be compiled also,
effectively sucking in a huge amount of unneeded code.
To prevent dependency problems, separate out the framebuffer notification
mechanism from the framebuffer layer and permanently link it to the kernel.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/video/fb_notify.c')
-rw-r--r-- | drivers/video/fb_notify.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/video/fb_notify.c b/drivers/video/fb_notify.c new file mode 100644 index 0000000..8c02038 --- /dev/null +++ b/drivers/video/fb_notify.c @@ -0,0 +1,46 @@ +/* + * linux/drivers/video/fb_notify.c + * + * Copyright (C) 2006 Antonino Daplas <adaplas@pol.net> + * + * 2001 - Documented with DocBook + * - Brad Douglas <brad@neruo.com> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ +#include <linux/fb.h> +#include <linux/notifier.h> + +static BLOCKING_NOTIFIER_HEAD(fb_notifier_list); + +/** + * fb_register_client - register a client notifier + * @nb: notifier block to callback on events + */ +int fb_register_client(struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&fb_notifier_list, nb); +} +EXPORT_SYMBOL(fb_register_client); + +/** + * fb_unregister_client - unregister a client notifier + * @nb: notifier block to callback on events + */ +int fb_unregister_client(struct notifier_block *nb) +{ + return blocking_notifier_chain_unregister(&fb_notifier_list, nb); +} +EXPORT_SYMBOL(fb_unregister_client); + +/** + * fb_notifier_call_chain - notify clients of fb_events + * + */ +int fb_notifier_call_chain(unsigned long val, void *v) +{ + return blocking_notifier_call_chain(&fb_notifier_list, val, v); +} +EXPORT_SYMBOL_GPL(fb_notifier_call_chain); |