2 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * 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.
14 * 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
18 #ifndef __XFS_SUPPORT_SPIN_H__
19 #define __XFS_SUPPORT_SPIN_H__
21 #include <linux/sched.h> /* preempt needs this */
22 #include <linux/spinlock.h>
25 * Map lock_t from IRIX to Linux spinlocks.
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).
31 typedef spinlock_t lock_t;
33 #define SPLDECL(s) unsigned long s
34 #ifndef DEFINE_SPINLOCK
35 #define DEFINE_SPINLOCK(s) spinlock_t s = SPIN_LOCK_UNLOCKED
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)
45 #endif /* __XFS_SUPPORT_SPIN_H__ */