1 /*- 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. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 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. 17 * 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. 28 * 29 * $FreeBSD$ 30 */ 31 #ifndef _LINUX_SPINLOCK_H_ 32 #define _LINUX_SPINLOCK_H_ 33 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/lock.h> 37 #include <sys/mutex.h> 38 39 #include <linux/compiler.h> 40 #include <linux/kernel.h> 41 #include <linux/rwlock.h> 42 43 typedef struct { 44 struct mtx m; 45 } spinlock_t; 46 47 #define spin_lock(_l) mtx_lock(&(_l)->m) 48 #define spin_unlock(_l) mtx_unlock(&(_l)->m) 49 #define spin_trylock(_l) mtx_trylock(&(_l)->m) 50 #define spin_lock_nested(_l, _n) mtx_lock_flags(&(_l)->m, MTX_DUPOK) 51 #define spin_lock_irq(lock) spin_lock(lock) 52 #define spin_unlock_irq(lock) spin_unlock(lock) 53 #define spin_lock_irqsave(lock, flags) \ 54 do {(flags) = 0; spin_lock(lock); } while (0) 55 #define spin_unlock_irqrestore(lock, flags) \ 56 do { spin_unlock(lock); } while (0) 57 58 static inline void 59 spin_lock_init(spinlock_t *lock) 60 { 61 62 memset(&lock->m, 0, sizeof(lock->m)); 63 mtx_init(&lock->m, "lnxspin", NULL, MTX_DEF | MTX_NOWITNESS); 64 } 65 66 #define DEFINE_SPINLOCK(lock) \ 67 spinlock_t lock; \ 68 MTX_SYSINIT(lock, &(lock).m, "lnxspin", MTX_DEF) 69 70 #endif /* _LINUX_SPINLOCK_H_ */ 71