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#include <linux/spinlock_types_raw.h>
13
14#ifndef CONFIG_PREEMPT_RT
15
16/* Non PREEMPT_RT kernels map spinlock to raw_spinlock */
17typedef struct spinlock {
18	union {
19		struct raw_spinlock rlock;
20
21#ifdef CONFIG_DEBUG_LOCK_ALLOC
22# define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map))
23		struct {
24			u8 __padding[LOCK_PADSIZE];
25			struct lockdep_map dep_map;
26		};
27#endif
28	};
29} spinlock_t;
30
31#define ___SPIN_LOCK_INITIALIZER(lockname)	\
32	{					\
33	.raw_lock = __ARCH_SPIN_LOCK_UNLOCKED,	\
34	SPIN_DEBUG_INIT(lockname)		\
35	SPIN_DEP_MAP_INIT(lockname) }
36
37#define __SPIN_LOCK_INITIALIZER(lockname) \
38	{ { .rlock = ___SPIN_LOCK_INITIALIZER(lockname) } }
39
40#define __SPIN_LOCK_UNLOCKED(lockname) \
41	(spinlock_t) __SPIN_LOCK_INITIALIZER(lockname)
42
43#define DEFINE_SPINLOCK(x)	spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
44
45#else /* !CONFIG_PREEMPT_RT */
46
47/* PREEMPT_RT kernels map spinlock to rt_mutex */
48#include <linux/rtmutex.h>
49
50typedef struct spinlock {
51	struct rt_mutex_base	lock;
52#ifdef CONFIG_DEBUG_LOCK_ALLOC
53	struct lockdep_map	dep_map;
54#endif
55} spinlock_t;
56
57#define __SPIN_LOCK_UNLOCKED(name)				\
58	{							\
59		.lock = __RT_MUTEX_BASE_INITIALIZER(name.lock),	\
60		SPIN_DEP_MAP_INIT(name)				\
61	}
62
63#define __LOCAL_SPIN_LOCK_UNLOCKED(name)			\
64	{							\
65		.lock = __RT_MUTEX_BASE_INITIALIZER(name.lock),	\
66		LOCAL_SPIN_DEP_MAP_INIT(name)			\
67	}
68
69#define DEFINE_SPINLOCK(name)					\
70	spinlock_t name = __SPIN_LOCK_UNLOCKED(name)
71
72#endif /* CONFIG_PREEMPT_RT */
73
74#include <linux/rwlock_types.h>
75
76#endif /* __LINUX_SPINLOCK_TYPES_H */
77