1219820Sjeff/*-
2219820Sjeff * Copyright (c) 2010 Isilon Systems, Inc.
3219820Sjeff * Copyright (c) 2010 iX Systems, Inc.
4219820Sjeff * Copyright (c) 2010 Panasas, Inc.
5271127Shselasky * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
6219820Sjeff * All rights reserved.
7219820Sjeff *
8219820Sjeff * Redistribution and use in source and binary forms, with or without
9219820Sjeff * modification, are permitted provided that the following conditions
10219820Sjeff * are met:
11219820Sjeff * 1. Redistributions of source code must retain the above copyright
12219820Sjeff *    notice unmodified, this list of conditions, and the following
13219820Sjeff *    disclaimer.
14219820Sjeff * 2. Redistributions in binary form must reproduce the above copyright
15219820Sjeff *    notice, this list of conditions and the following disclaimer in the
16219820Sjeff *    documentation and/or other materials provided with the distribution.
17219820Sjeff *
18219820Sjeff * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19219820Sjeff * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20219820Sjeff * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21219820Sjeff * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22219820Sjeff * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23219820Sjeff * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24219820Sjeff * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25219820Sjeff * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26219820Sjeff * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27219820Sjeff * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28219820Sjeff */
29219820Sjeff#ifndef	_LINUX_MUTEX_H_
30219820Sjeff#define	_LINUX_MUTEX_H_
31219820Sjeff
32219820Sjeff#include <sys/param.h>
33219820Sjeff#include <sys/lock.h>
34219820Sjeff#include <sys/sx.h>
35219820Sjeff
36219820Sjeff#include <linux/spinlock.h>
37219820Sjeff
38219820Sjefftypedef struct mutex {
39219820Sjeff	struct sx sx;
40219820Sjeff} mutex_t;
41219820Sjeff
42219820Sjeff#define	mutex_lock(_m)			sx_xlock(&(_m)->sx)
43219820Sjeff#define	mutex_lock_nested(_m, _s)	mutex_lock(_m)
44219820Sjeff#define	mutex_lock_interruptible(_m)	({ mutex_lock((_m)); 0; })
45219820Sjeff#define	mutex_unlock(_m)		sx_xunlock(&(_m)->sx)
46219820Sjeff#define	mutex_trylock(_m)		!!sx_try_xlock(&(_m)->sx)
47219820Sjeff
48219820Sjeff#define DEFINE_MUTEX(lock)						\
49219820Sjeff	mutex_t lock;							\
50219820Sjeff	SX_SYSINIT_FLAGS(lock, &(lock).sx, "lnxmtx", SX_NOWITNESS)
51219820Sjeff
52219820Sjeffstatic inline void
53219820Sjefflinux_mutex_init(mutex_t *m)
54219820Sjeff{
55219820Sjeff
56219820Sjeff	memset(&m->sx, 0, sizeof(m->sx));
57219820Sjeff	sx_init_flags(&m->sx, "lnxmtx",  SX_NOWITNESS);
58219820Sjeff}
59219820Sjeff
60219820Sjeff#define	mutex_init	linux_mutex_init
61219820Sjeff
62219820Sjeff#endif	/* _LINUX_MUTEX_H_ */
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