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/*
* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms 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. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#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__ */
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