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_MUTEX_H_ 32 #define _LINUX_MUTEX_H_ 33 34 #include <sys/param.h> 35 #include <sys/lock.h> 36 #include <sys/sx.h> 37 38 #include <linux/spinlock.h> 39 40 typedef struct mutex { 41 struct sx sx; 42 } mutex_t; 43 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) 49 50 #define DEFINE_MUTEX(lock) \ 51 mutex_t lock; \ 52 SX_SYSINIT_FLAGS(lock, &(lock).sx, "lnxmtx", SX_NOWITNESS) 53 54 static inline void 55 linux_mutex_init(mutex_t *m) 56 { 57 58 memset(&m->sx, 0, sizeof(m->sx)); 59 sx_init_flags(&m->sx, "lnxmtx", SX_NOWITNESS); 60 } 61 62 #define mutex_init(m) linux_mutex_init(m) 63 64 #endif /* _LINUX_MUTEX_H_ */ 65