2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #ifndef _LINUX_SPINLOCK_H_
29 #define _LINUX_SPINLOCK_H_
31 #include <sys/param.h>
32 #include <sys/kernel.h>
34 #include <sys/mutex.h>
36 #include <linux/compiler.h>
37 #include <linux/kernel.h>
38 #include <linux/lockdep.h>
39 #include <linux/rwlock.h>
45 #define spin_lock(_l) mtx_lock(&(_l)->m)
46 #define spin_unlock(_l) mtx_unlock(&(_l)->m)
47 #define spin_trylock(_l) mtx_trylock(&(_l)->m)
48 #define spin_lock_nested(_l, _n) mtx_lock_flags(&(_l)->m, MTX_DUPOK)
49 #define spin_lock_irq(lock) spin_lock(lock)
50 #define spin_unlock_irq(lock) spin_unlock(lock)
51 #define spin_lock_irqsave(lock, flags) \
52 do {(flags) = 0; spin_lock(lock); } while (0)
53 #define spin_unlock_irqrestore(lock, flags) \
54 do { spin_unlock(lock); } while (0)
57 spin_lock_init(spinlock_t *lock)
60 memset(&lock->m, 0, sizeof(lock->m));
61 mtx_init(&lock->m, "lnxspin", NULL, MTX_DEF | MTX_NOWITNESS);
64 #define DEFINE_SPINLOCK(lock) \
66 MTX_SYSINIT(lock, &(lock).m, "lnxspin", MTX_DEF)
68 #endif /* _LINUX_SPINLOCK_H_ */