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.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #ifndef _LINUX_MUTEX_H_
32 #define _LINUX_MUTEX_H_
34 #include <sys/param.h>
38 #include <linux/spinlock.h>
40 typedef struct mutex {
44 #define mutex_lock(_m) sx_xlock(&(_m)->sx)
45 #define mutex_lock_nested(_m, _s) mutex_lock(_m)
46 #define mutex_lock_interruptible(_m) ({ mutex_lock((_m)); 0; })
47 #define mutex_unlock(_m) sx_xunlock(&(_m)->sx)
48 #define mutex_trylock(_m) !!sx_try_xlock(&(_m)->sx)
50 #define DEFINE_MUTEX(lock) \
52 SX_SYSINIT_FLAGS(lock, &(lock).sx, "lnxmtx", SX_NOWITNESS)
55 linux_mutex_init(mutex_t *m)
58 memset(&m->sx, 0, sizeof(m->sx));
59 sx_init_flags(&m->sx, "lnxmtx", SX_NOWITNESS);
62 #define mutex_init(m) linux_mutex_init(m)
64 #endif /* _LINUX_MUTEX_H_ */