/*
* 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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