1
2#ifndef __LINUX_SPINLOCK_RT_H
3#define __LINUX_SPINLOCK_RT_H
4
5#ifndef __LINUX_SPINLOCK_H
6#error Do not include directly. Use spinlock.h
7#endif
8
9#ifdef CONFIG_DEBUG_LOCK_ALLOC
10extern void __rt_spin_lock_init(spinlock_t *lock, const char *name,
11 struct lock_class_key *key, bool percpu);
12#else
13static inline void __rt_spin_lock_init(spinlock_t *lock, const char *name,
14 struct lock_class_key *key, bool percpu)
15{
16}
17#endif
18
19#define spin_lock_init(slock) \
20do { \
21 static struct lock_class_key __key; \
22 \
23 rt_mutex_base_init(&(slock)->lock); \
24 __rt_spin_lock_init(slock, #slock, &__key, false); \
25} while (0)
26
27#define local_spin_lock_init(slock) \
28do { \
29 static struct lock_class_key __key; \
30 \
31 rt_mutex_base_init(&(slock)->lock); \
32 __rt_spin_lock_init(slock, #slock, &__key, true); \
33} while (0)
34
35extern void rt_spin_lock(spinlock_t *lock);
36extern void rt_spin_lock_nested(spinlock_t *lock, int subclass);
37extern void rt_spin_lock_nest_lock(spinlock_t *lock, struct lockdep_map *nest_lock);
38extern void rt_spin_unlock(spinlock_t *lock);
39extern void rt_spin_lock_unlock(spinlock_t *lock);
40extern int rt_spin_trylock_bh(spinlock_t *lock);
41extern int rt_spin_trylock(spinlock_t *lock);
42
43static __always_inline void spin_lock(spinlock_t *lock)
44{
45 rt_spin_lock(lock);
46}
47
48#ifdef CONFIG_LOCKDEP
49# define __spin_lock_nested(lock, subclass) \
50 rt_spin_lock_nested(lock, subclass)
51
52# define __spin_lock_nest_lock(lock, nest_lock) \
53 do { \
54 typecheck(struct lockdep_map *, &(nest_lock)->dep_map); \
55 rt_spin_lock_nest_lock(lock, &(nest_lock)->dep_map); \
56 } while (0)
57# define __spin_lock_irqsave_nested(lock, flags, subclass) \
58 do { \
59 typecheck(unsigned long, flags); \
60 flags = 0; \
61 __spin_lock_nested(lock, subclass); \
62 } while (0)
63
64#else
65
66
67
68
69
70# define __spin_lock_nested(lock, subclass) spin_lock(((void)(subclass), (lock)))
71# define __spin_lock_nest_lock(lock, subclass) spin_lock(((void)(subclass), (lock)))
72# define __spin_lock_irqsave_nested(lock, flags, subclass) \
73 spin_lock_irqsave(((void)(subclass), (lock)), flags)
74#endif
75
76#define spin_lock_nested(lock, subclass) \
77 __spin_lock_nested(lock, subclass)
78
79#define spin_lock_nest_lock(lock, nest_lock) \
80 __spin_lock_nest_lock(lock, nest_lock)
81
82#define spin_lock_irqsave_nested(lock, flags, subclass) \
83 __spin_lock_irqsave_nested(lock, flags, subclass)
84
85static __always_inline void spin_lock_bh(spinlock_t *lock)
86{
87
88 local_bh_disable();
89 rt_spin_lock(lock);
90}
91
92static __always_inline void spin_lock_irq(spinlock_t *lock)
93{
94 rt_spin_lock(lock);
95}
96
97#define spin_lock_irqsave(lock, flags) \
98 do { \
99 typecheck(unsigned long, flags); \
100 flags = 0; \
101 spin_lock(lock); \
102 } while (0)
103
104static __always_inline void spin_unlock(spinlock_t *lock)
105{
106 rt_spin_unlock(lock);
107}
108
109static __always_inline void spin_unlock_bh(spinlock_t *lock)
110{
111 rt_spin_unlock(lock);
112 local_bh_enable();
113}
114
115static __always_inline void spin_unlock_irq(spinlock_t *lock)
116{
117 rt_spin_unlock(lock);
118}
119
120static __always_inline void spin_unlock_irqrestore(spinlock_t *lock,
121 unsigned long flags)
122{
123 rt_spin_unlock(lock);
124}
125
126#define spin_trylock(lock) \
127 __cond_lock(lock, rt_spin_trylock(lock))
128
129#define spin_trylock_bh(lock) \
130 __cond_lock(lock, rt_spin_trylock_bh(lock))
131
132#define spin_trylock_irq(lock) \
133 __cond_lock(lock, rt_spin_trylock(lock))
134
135#define __spin_trylock_irqsave(lock, flags) \
136({ \
137 int __locked; \
138 \
139 typecheck(unsigned long, flags); \
140 flags = 0; \
141 __locked = spin_trylock(lock); \
142 __locked; \
143})
144
145#define spin_trylock_irqsave(lock, flags) \
146 __cond_lock(lock, __spin_trylock_irqsave(lock, flags))
147
148#define spin_is_contended(lock) (((void)(lock), 0))
149
150static inline int spin_is_locked(spinlock_t *lock)
151{
152 return rt_mutex_base_is_locked(&lock->lock);
153}
154
155#define assert_spin_locked(lock) BUG_ON(!spin_is_locked(lock))
156
157#include <linux/rwlock_rt.h>
158
159#endif
160
