1/*-
2 * Copyright (c) 2015-2020 Mellanox Technologies, Ltd.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice unmodified, this list of conditions, and the following
10 *    disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/11/sys/compat/linuxkpi/common/include/linux/srcu.h 361924 2020-06-08 09:39:16Z hselasky $
27 */
28
29#ifndef	_LINUX_SRCU_H_
30#define	_LINUX_SRCU_H_
31
32#include <linux/compiler.h>
33
34struct srcu_struct {
35};
36
37#define	srcu_dereference(p, srcu) \
38	((__typeof(*(p)) *)READ_ONCE(p))
39
40#define	DEFINE_STATIC_SRCU(name) \
41	static struct srcu_struct name
42
43/* prototypes */
44
45extern int srcu_read_lock(struct srcu_struct *);
46extern void srcu_read_unlock(struct srcu_struct *, int index);
47extern void synchronize_srcu(struct srcu_struct *);
48extern void srcu_barrier(struct srcu_struct *);
49extern int init_srcu_struct(struct srcu_struct *);
50extern void cleanup_srcu_struct(struct srcu_struct *);
51
52#define	synchronize_srcu_expedited(srcu) do {	\
53	synchronize_srcu(srcu);			\
54} while (0)
55
56#endif					/* _LINUX_SRCU_H_ */
57