spinlock.h revision 289624 
1/* $FreeBSD: head/sys/ofed/include/linux/spinlock.h 289624 2015-10-20 11:40:04Z hselasky $ */
2/*-
3 * Copyright (c) 2010 Isilon Systems, Inc.
4 * Copyright (c) 2010 iX Systems, Inc.
5 * Copyright (c) 2010 Panasas, Inc.
6 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
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#ifndef	_LINUX_SPINLOCK_H_
31#define	_LINUX_SPINLOCK_H_
32
33#include <sys/param.h>
34#include <sys/kernel.h>
35#include <sys/lock.h>
36#include <sys/mutex.h>
37
38#include <linux/compiler.h>
39#include <linux/kernel.h>
40#include <linux/rwlock.h>
41
42typedef struct {
43	struct mtx m;
44} spinlock_t;
45
46#define	spin_lock(_l)		mtx_lock(&(_l)->m)
47#define	spin_unlock(_l)		mtx_unlock(&(_l)->m)
48#define	spin_trylock(_l)	mtx_trylock(&(_l)->m)
49#define	spin_lock_nested(_l, _n) mtx_lock_flags(&(_l)->m, MTX_DUPOK)
50#define	spin_lock_irq(lock)	spin_lock(lock)
51#define	spin_unlock_irq(lock)	spin_unlock(lock)
52#define	spin_lock_irqsave(lock, flags)   				\
53    do {(flags) = 0; spin_lock(lock); } while (0)
54#define	spin_unlock_irqrestore(lock, flags)				\
55    do { spin_unlock(lock); } while (0)
56
57static inline void
58spin_lock_init(spinlock_t *lock)
59{
60
61	memset(&lock->m, 0, sizeof(lock->m));
62	mtx_init(&lock->m, "lnxspin", NULL, MTX_DEF | MTX_NOWITNESS);
63}
64
65#define	DEFINE_SPINLOCK(lock)						\
66	spinlock_t lock;						\
67	MTX_SYSINIT(lock, &(lock).m, "lnxspin", MTX_DEF)
68
69#endif	/* _LINUX_SPINLOCK_H_ */
70