[linux-2.6-block.git] / fs / xfs / linux-2.6 / spin.h

/*
 * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Further, this software is distributed without any warranty that it is
 * free of the rightful claim of any third person regarding infringement
 * or the like.  Any license provided herein, whether implied or
 * otherwise, applies only to this software file.  Patent licenses, if
 * any, provided herein do not apply to combinations of this program with
 * other software, or any other product whatsoever.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 *
 * http://www.sgi.com
 *
 * For further information regarding this notice, see:
 *
 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
 */
#ifndef __XFS_SUPPORT_SPIN_H__
#define __XFS_SUPPORT_SPIN_H__

#include <linux/sched.h>	/* preempt needs this */
#include <linux/spinlock.h>

/*
 * Map lock_t from IRIX to Linux spinlocks.
 *
 * We do not make use of lock_t from interrupt context, so we do not
 * have to worry about disabling interrupts at all (unlike IRIX).
 */

typedef spinlock_t lock_t;

#define SPLDECL(s)			unsigned long s
#ifndef DEFINE_SPINLOCK
#define DEFINE_SPINLOCK(s)		spinlock_t s = SPIN_LOCK_UNLOCKED
#endif

#define spinlock_init(lock, name)	spin_lock_init(lock)
#define	spinlock_destroy(lock)
#define mutex_spinlock(lock)		({ spin_lock(lock); 0; })
#define mutex_spinunlock(lock, s)	do { spin_unlock(lock); (void)s; } while (0)
#define nested_spinlock(lock)		spin_lock(lock)
#define nested_spinunlock(lock)		spin_unlock(lock)

#endif /* __XFS_SUPPORT_SPIN_H__ */
Commit	Line	Data
1da177e4 LT	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
53937c52 NS	48	#ifndef DEFINE_SPINLOCK
	49	#define DEFINE_SPINLOCK(s) spinlock_t s = SPIN_LOCK_UNLOCKED
	50	#endif
1da177e4 LT	51
	52	#define spinlock_init(lock, name) spin_lock_init(lock)
	53	#define spinlock_destroy(lock)
	54	#define mutex_spinlock(lock) ({ spin_lock(lock); 0; })
	55	#define mutex_spinunlock(lock, s) do { spin_unlock(lock); (void)s; } while (0)
	56	#define nested_spinlock(lock) spin_lock(lock)
	57	#define nested_spinunlock(lock) spin_unlock(lock)
	58
	59	#endif /* __XFS_SUPPORT_SPIN_H__ */