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
18#include <linux/lockdep.h>
19
20typedef struct raw_spinlock {
21 arch_spinlock_t raw_lock;
22#ifdef CONFIG_DEBUG_SPINLOCK
23 unsigned int magic, owner_cpu;
24 void *owner;
25#endif
26#ifdef CONFIG_DEBUG_LOCK_ALLOC
27 struct lockdep_map dep_map;
28#endif
29} raw_spinlock_t;
30
31#define SPINLOCK_MAGIC 0xdead4ead
32
33#define SPINLOCK_OWNER_INIT ((void *)-1L)
34
35#ifdef CONFIG_DEBUG_LOCK_ALLOC
36# define SPIN_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname }
37#else
38# define SPIN_DEP_MAP_INIT(lockname)
39#endif
40
41#ifdef CONFIG_DEBUG_SPINLOCK
42# define SPIN_DEBUG_INIT(lockname) \
43 .magic = SPINLOCK_MAGIC, \
44 .owner_cpu = -1, \
45 .owner = SPINLOCK_OWNER_INIT,
46#else
47# define SPIN_DEBUG_INIT(lockname)
48#endif
49
50#define __RAW_SPIN_LOCK_INITIALIZER(lockname) \
51 { \
52 .raw_lock = __ARCH_SPIN_LOCK_UNLOCKED, \
53 SPIN_DEBUG_INIT(lockname) \
54 SPIN_DEP_MAP_INIT(lockname) }
55
56#define __RAW_SPIN_LOCK_UNLOCKED(lockname) \
57 (raw_spinlock_t) __RAW_SPIN_LOCK_INITIALIZER(lockname)
58
59#define DEFINE_RAW_SPINLOCK(x) raw_spinlock_t x = __RAW_SPIN_LOCK_UNLOCKED(x)
60
61typedef struct spinlock {
62 union {
63 struct raw_spinlock rlock;
64
65#ifdef CONFIG_DEBUG_LOCK_ALLOC
66# define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map))
67 struct {
68 u8 __padding[LOCK_PADSIZE];
69 struct lockdep_map dep_map;
70 };
71#endif
72 };
73} spinlock_t;
74
75#define __SPIN_LOCK_INITIALIZER(lockname) \
76 { { .rlock = __RAW_SPIN_LOCK_INITIALIZER(lockname) } }
77
78#define __SPIN_LOCK_UNLOCKED(lockname) \
79 (spinlock_t ) __SPIN_LOCK_INITIALIZER(lockname)
80
81#define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
82
83#include <linux/rwlock_types.h>
84
85#endif /* __LINUX_SPINLOCK_TYPES_H */
86