1 /* 2 * Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of version 2 of the GNU General Public License as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it would be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 11 * 12 * Further, this software is distributed without any warranty that it is 13 * free of the rightful claim of any third person regarding infringement 14 * or the like. Any license provided herein, whether implied or 15 * otherwise, applies only to this software file. Patent licenses, if 16 * any, provided herein do not apply to combinations of this program with 17 * other software, or any other product whatsoever. 18 * 19 * You should have received a copy of the GNU General Public License along 20 * with this program; if not, write the Free Software Foundation, Inc., 59 21 * Temple Place - Suite 330, Boston MA 02111-1307, USA. 22 * 23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, 24 * Mountain View, CA 94043, or: 25 * 26 * http://www.sgi.com 27 * 28 * For further information regarding this notice, see: 29 * 30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ 31 */ 32 #ifndef __XFS_SUPPORT_SPIN_H__ 33 #define __XFS_SUPPORT_SPIN_H__ 34 35 #include <linux/sched.h> /* preempt needs this */ 36 #include <linux/spinlock.h> 37 38 /* 39 * Map lock_t from IRIX to Linux spinlocks. 40 * 41 * We do not make use of lock_t from interrupt context, so we do not 42 * have to worry about disabling interrupts at all (unlike IRIX). 43 */ 44 45 typedef spinlock_t lock_t; 46 47 #define SPLDECL(s) unsigned long s 48 49 #define spinlock_init(lock, name) spin_lock_init(lock) 50 #define spinlock_destroy(lock) 51 #define mutex_spinlock(lock) ({ spin_lock(lock); 0; }) 52 #define mutex_spinunlock(lock, s) do { spin_unlock(lock); (void)s; } while (0) 53 #define nested_spinlock(lock) spin_lock(lock) 54 #define nested_spinunlock(lock) spin_unlock(lock) 55 56 #endif /* __XFS_SUPPORT_SPIN_H__ */ 57