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1#ifndef __LINUX_SPINLOCK_TYPES_H
2#define __LINUX_SPINLOCK_TYPES_H
3
4/*
5 * include/linux/spinlock_types.h - generic spinlock type definitions
6 * and initializers
7 *
8 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
9 * Released under the General Public License (GPL).
10 */
11
12#if defined(CONFIG_SMP)
13# include <asm/spinlock_types.h>
14#else
15# include <linux/spinlock_types_up.h>
16#endif
17
18typedef struct {
19 raw_spinlock_t raw_lock;
20#if defined(CONFIG_PREEMPT) && defined(CONFIG_SMP)
21 unsigned int break_lock;
22#endif
23#ifdef CONFIG_DEBUG_SPINLOCK
24 unsigned int magic, owner_cpu;
25 void *owner;
26#endif
27} spinlock_t;
28
29#define SPINLOCK_MAGIC 0xdead4ead
30
31typedef struct {
32 raw_rwlock_t raw_lock;
33#if defined(CONFIG_PREEMPT) && defined(CONFIG_SMP)
34 unsigned int break_lock;
35#endif
36#ifdef CONFIG_DEBUG_SPINLOCK
37 unsigned int magic, owner_cpu;
38 void *owner;
39#endif
40} rwlock_t;
41
42#define RWLOCK_MAGIC 0xdeaf1eed
43
44#define SPINLOCK_OWNER_INIT ((void *)-1L)
45
46#ifdef CONFIG_DEBUG_SPINLOCK
47# define SPIN_LOCK_UNLOCKED \
48 (spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \
49 .magic = SPINLOCK_MAGIC, \
50 .owner = SPINLOCK_OWNER_INIT, \
51 .owner_cpu = -1 }
52#define RW_LOCK_UNLOCKED \
53 (rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \
54 .magic = RWLOCK_MAGIC, \
55 .owner = SPINLOCK_OWNER_INIT, \
56 .owner_cpu = -1 }
57#else
58# define SPIN_LOCK_UNLOCKED \
59 (spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED }
60#define RW_LOCK_UNLOCKED \
61 (rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED }
62#endif
63
64#define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_UNLOCKED
65#define DEFINE_RWLOCK(x) rwlock_t x = RW_LOCK_UNLOCKED
66
67#endif /* __LINUX_SPINLOCK_TYPES_H */