/* * 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(unsignedlong val, void *v)
{ return blocking_notifier_call_chain(&fb_notifier_list, val, v);
}
EXPORT_SYMBOL_GPL(fb_notifier_call_chain);
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