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/*
* 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);
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