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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
18#ifndef __XFS_SUPPORT_SPIN_H__
19#define __XFS_SUPPORT_SPIN_H__
20
21#include <linux/sched.h> /* preempt needs this */
22#include <linux/spinlock.h>
23
24/*
25 * Map lock_t from IRIX to Linux spinlocks.
26 *
27 * We do not make use of lock_t from interrupt context, so we do not
28 * have to worry about disabling interrupts at all (unlike IRIX).
29 */
30
31typedef spinlock_t lock_t;
32
33#define SPLDECL(s) unsigned long s
Nathan Scott53937c52005-09-05 08:27:50 +100034#ifndef DEFINE_SPINLOCK
35#define DEFINE_SPINLOCK(s) spinlock_t s = SPIN_LOCK_UNLOCKED
36#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
38#define spinlock_init(lock, name) spin_lock_init(lock)
39#define spinlock_destroy(lock)
40#define mutex_spinlock(lock) ({ spin_lock(lock); 0; })
41#define mutex_spinunlock(lock, s) do { spin_unlock(lock); (void)s; } while (0)
42#define nested_spinlock(lock) spin_lock(lock)
43#define nested_spinunlock(lock) spin_unlock(lock)
44
45#endif /* __XFS_SUPPORT_SPIN_H__ */