spinlock.h revision 219820
10Sduke/*- 2553Sohair * Copyright (c) 2010 Isilon Systems, Inc. 30Sduke * Copyright (c) 2010 iX Systems, Inc. 40Sduke * Copyright (c) 2010 Panasas, Inc. 50Sduke * All rights reserved. 60Sduke * 70Sduke * Redistribution and use in source and binary forms, with or without 80Sduke * modification, are permitted provided that the following conditions 90Sduke * are met: 100Sduke * 1. Redistributions of source code must retain the above copyright 110Sduke * notice unmodified, this list of conditions, and the following 120Sduke * disclaimer. 130Sduke * 2. Redistributions in binary form must reproduce the above copyright 140Sduke * notice, this list of conditions and the following disclaimer in the 150Sduke * documentation and/or other materials provided with the distribution. 160Sduke * 170Sduke * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 180Sduke * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19553Sohair * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20553Sohair * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21553Sohair * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 220Sduke * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 230Sduke * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 240Sduke * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 250Sduke * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 260Sduke * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 270Sduke */ 280Sduke#ifndef _LINUX_SPINLOCK_H_ 290Sduke#define _LINUX_SPINLOCK_H_ 30288Sdarcy 310Sduke#include <sys/param.h> 320Sduke#include <sys/kernel.h> 330Sduke#include <sys/lock.h> 340Sduke#include <sys/mutex.h> 350Sduke 360Sduke#include <linux/compiler.h> 370Sduke#include <linux/kernel.h> 380Sduke#include <linux/lockdep.h> 390Sduke#include <linux/rwlock.h> 400Sduke 410Sduketypedef struct { 420Sduke struct mtx m; 430Sduke} spinlock_t; 440Sduke 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) 55 56static inline void 57spin_lock_init(spinlock_t *lock) 58{ 59 60 memset(&lock->m, 0, sizeof(lock->m)); 61 mtx_init(&lock->m, "lnxspin", NULL, MTX_DEF | MTX_NOWITNESS); 62} 63 64#define DEFINE_SPINLOCK(lock) \ 65 spinlock_t lock; \ 66 MTX_SYSINIT(lock, &(lock).m, "lnxspin", MTX_DEF) 67 68#endif /* _LINUX_SPINLOCK_H_ */ 69