1 /* 2 * linux/drivers/video/fb_notify.c 3 * 4 * Copyright (C) 2006 Antonino Daplas <adaplas@pol.net> 5 * 6 * 2001 - Documented with DocBook 7 * - Brad Douglas <brad@neruo.com> 8 * 9 * This file is subject to the terms and conditions of the GNU General Public 10 * License. See the file COPYING in the main directory of this archive 11 * for more details. 12 */ 13 #include <linux/fb.h> 14 #include <linux/notifier.h> 15 #include <linux/export.h> 16 17 static BLOCKING_NOTIFIER_HEAD(fb_notifier_list); 18 19 /** 20 * fb_register_client - register a client notifier 21 * @nb: notifier block to callback on events 22 */ 23 int fb_register_client(struct notifier_block *nb) 24 { 25 return blocking_notifier_chain_register(&fb_notifier_list, nb); 26 } 27 EXPORT_SYMBOL(fb_register_client); 28 29 /** 30 * fb_unregister_client - unregister a client notifier 31 * @nb: notifier block to callback on events 32 */ 33 int fb_unregister_client(struct notifier_block *nb) 34 { 35 return blocking_notifier_chain_unregister(&fb_notifier_list, nb); 36 } 37 EXPORT_SYMBOL(fb_unregister_client); 38 39 /** 40 * fb_notifier_call_chain - notify clients of fb_events 41 * 42 */ 43 int fb_notifier_call_chain(unsigned long val, void *v) 44 { 45 return blocking_notifier_call_chain(&fb_notifier_list, val, v); 46 } 47 EXPORT_SYMBOL_GPL(fb_notifier_call_chain); 48