Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
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. | |
1da177e4 | 13 | * |
7b718769 NS |
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 | |
1da177e4 LT |
17 | */ |
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 | ||
31 | typedef spinlock_t lock_t; | |
32 | ||
33 | #define SPLDECL(s) unsigned long s | |
53937c52 NS |
34 | #ifndef DEFINE_SPINLOCK |
35 | #define DEFINE_SPINLOCK(s) spinlock_t s = SPIN_LOCK_UNLOCKED | |
36 | #endif | |
1da177e4 LT |
37 | |
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__ */ |