/* *  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>#include <linux/export.h> static BLOCKING_NOTIFIER_HEAD(fb_notifier_list); /** *	fb_register_client - register a client notifier *	@nb: notifier block to callback on events * *	Return: 0 on success, negative error code on failure. */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 * *	Return: 0 on success, negative error code on failure. */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 * @val: value passed to callback * @v: pointer passed to callback * * Return: The return value of the last notifier function */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);