xref: /dragonfly/sys/dev/drm/include/linux/notifier.h (revision ee7ffe43)
1 /*-
2  * Copyright (c) 2010 Isilon Systems, Inc.
3  * Copyright (c) 2010 iX Systems, Inc.
4  * Copyright (c) 2010 Panasas, Inc.
5  * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
6  * Copyright (c) 2017 François Tigeot <ftigeot@wolfpond.org>
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice unmodified, this list of conditions, and the following
14  *    disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 #ifndef	_LINUX_NOTIFIER_H_
32 #define	_LINUX_NOTIFIER_H_
33 
34 #include <linux/errno.h>
35 #include <linux/mutex.h>
36 
37 #include <sys/eventhandler.h>
38 
39 /*
40  * Max number of FreeBSD events to map to Linux events per notify type.
41  */
42 #define	NOTIFY_DONE	0
43 #define	_NOTIFY_COUNT	7
44 
45 struct notifier_block {
46 	int (*notifier_call)(struct notifier_block *, unsigned long, void *);
47 	struct notifier_block	*next;
48 	int			priority;
49 	eventhandler_tag	tags[_NOTIFY_COUNT];
50 };
51 
52 /* Values must be less than NOTIFY_COUNT */
53 #define	NETDEV_UP		0x0001
54 #define	NETDEV_DOWN		0x0002
55 #define	NETDEV_REGISTER		0x0003
56 #define	NETDEV_UNREGISTER	0x0004
57 #define	NETDEV_CHANGEADDR       0x0005
58 #define	NETDEV_CHANGEIFADDR     0x0006
59 
60 struct atomic_notifier_head {
61 };
62 
63 static inline void
64 ATOMIC_INIT_NOTIFIER_HEAD(struct atomic_notifier_head *anh)
65 {
66 }
67 
68 static inline int
69 atomic_notifier_call_chain(struct atomic_notifier_head *anh,
70 					unsigned long val, void *v)
71 {
72 	return 0;
73 }
74 
75 #endif	/* _LINUX_NOTIFIER_H_ */
76