| /* |
| * 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__ */ |
