Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 */
17context_lock_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};
30typedef struct spinlock spinlock_t;
31
32#define ___SPIN_LOCK_INITIALIZER(lockname) \
33 { \
34 .raw_lock = __ARCH_SPIN_LOCK_UNLOCKED, \
35 SPIN_DEBUG_INIT(lockname) \
36 SPIN_DEP_MAP_INIT(lockname) }
37
38#define __SPIN_LOCK_INITIALIZER(lockname) \
39 { { .rlock = ___SPIN_LOCK_INITIALIZER(lockname) } }
40
41#define __SPIN_LOCK_UNLOCKED(lockname) \
42 (spinlock_t) __SPIN_LOCK_INITIALIZER(lockname)
43
44#define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
45
46#else /* !CONFIG_PREEMPT_RT */
47
48/* PREEMPT_RT kernels map spinlock to rt_mutex */
49#include <linux/rtmutex.h>
50
51context_lock_struct(spinlock) {
52 struct rt_mutex_base lock;
53#ifdef CONFIG_DEBUG_LOCK_ALLOC
54 struct lockdep_map dep_map;
55#endif
56};
57typedef struct spinlock spinlock_t;
58
59#define __SPIN_LOCK_UNLOCKED(name) \
60 { \
61 .lock = __RT_MUTEX_BASE_INITIALIZER(name.lock), \
62 SPIN_DEP_MAP_INIT(name) \
63 }
64
65#define __LOCAL_SPIN_LOCK_UNLOCKED(name) \
66 { \
67 .lock = __RT_MUTEX_BASE_INITIALIZER(name.lock), \
68 LOCAL_SPIN_DEP_MAP_INIT(name) \
69 }
70
71#define DEFINE_SPINLOCK(name) \
72 spinlock_t name = __SPIN_LOCK_UNLOCKED(name)
73
74#endif /* CONFIG_PREEMPT_RT */
75
76#include <linux/rwlock_types.h>
77
78#endif /* __LINUX_SPINLOCK_TYPES_H */