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Diffstat (limited to 'include/asm-arm/spinlock.h')
-rw-r--r--include/asm-arm/spinlock.h50
1 files changed, 17 insertions, 33 deletions
diff --git a/include/asm-arm/spinlock.h b/include/asm-arm/spinlock.h
index 1f906d09b688..cb4906b45555 100644
--- a/include/asm-arm/spinlock.h
+++ b/include/asm-arm/spinlock.h
@@ -16,21 +16,14 @@
16 * Unlocked value: 0 16 * Unlocked value: 0
17 * Locked value: 1 17 * Locked value: 1
18 */ 18 */
19typedef struct {
20 volatile unsigned int lock;
21#ifdef CONFIG_PREEMPT
22 unsigned int break_lock;
23#endif
24} spinlock_t;
25 19
26#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 } 20#define __raw_spin_is_locked(x) ((x)->lock != 0)
21#define __raw_spin_unlock_wait(lock) \
22 do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0)
27 23
28#define spin_lock_init(x) do { *(x) = SPIN_LOCK_UNLOCKED; } while (0) 24#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
29#define spin_is_locked(x) ((x)->lock != 0)
30#define spin_unlock_wait(x) do { barrier(); } while (spin_is_locked(x))
31#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
32 25
33static inline void _raw_spin_lock(spinlock_t *lock) 26static inline void __raw_spin_lock(raw_spinlock_t *lock)
34{ 27{
35 unsigned long tmp; 28 unsigned long tmp;
36 29
@@ -47,7 +40,7 @@ static inline void _raw_spin_lock(spinlock_t *lock)
47 smp_mb(); 40 smp_mb();
48} 41}
49 42
50static inline int _raw_spin_trylock(spinlock_t *lock) 43static inline int __raw_spin_trylock(raw_spinlock_t *lock)
51{ 44{
52 unsigned long tmp; 45 unsigned long tmp;
53 46
@@ -67,7 +60,7 @@ static inline int _raw_spin_trylock(spinlock_t *lock)
67 } 60 }
68} 61}
69 62
70static inline void _raw_spin_unlock(spinlock_t *lock) 63static inline void __raw_spin_unlock(raw_spinlock_t *lock)
71{ 64{
72 smp_mb(); 65 smp_mb();
73 66
@@ -80,23 +73,14 @@ static inline void _raw_spin_unlock(spinlock_t *lock)
80 73
81/* 74/*
82 * RWLOCKS 75 * RWLOCKS
83 */ 76 *
84typedef struct { 77 *
85 volatile unsigned int lock;
86#ifdef CONFIG_PREEMPT
87 unsigned int break_lock;
88#endif
89} rwlock_t;
90
91#define RW_LOCK_UNLOCKED (rwlock_t) { 0 }
92#define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while (0)
93#define rwlock_is_locked(x) (*((volatile unsigned int *)(x)) != 0)
94
95/*
96 * Write locks are easy - we just set bit 31. When unlocking, we can 78 * Write locks are easy - we just set bit 31. When unlocking, we can
97 * just write zero since the lock is exclusively held. 79 * just write zero since the lock is exclusively held.
98 */ 80 */
99static inline void _raw_write_lock(rwlock_t *rw) 81#define rwlock_is_locked(x) (*((volatile unsigned int *)(x)) != 0)
82
83static inline void __raw_write_lock(rwlock_t *rw)
100{ 84{
101 unsigned long tmp; 85 unsigned long tmp;
102 86
@@ -113,7 +97,7 @@ static inline void _raw_write_lock(rwlock_t *rw)
113 smp_mb(); 97 smp_mb();
114} 98}
115 99
116static inline int _raw_write_trylock(rwlock_t *rw) 100static inline int __raw_write_trylock(rwlock_t *rw)
117{ 101{
118 unsigned long tmp; 102 unsigned long tmp;
119 103
@@ -133,7 +117,7 @@ static inline int _raw_write_trylock(rwlock_t *rw)
133 } 117 }
134} 118}
135 119
136static inline void _raw_write_unlock(rwlock_t *rw) 120static inline void __raw_write_unlock(raw_rwlock_t *rw)
137{ 121{
138 smp_mb(); 122 smp_mb();
139 123
@@ -156,7 +140,7 @@ static inline void _raw_write_unlock(rwlock_t *rw)
156 * currently active. However, we know we won't have any write 140 * currently active. However, we know we won't have any write
157 * locks. 141 * locks.
158 */ 142 */
159static inline void _raw_read_lock(rwlock_t *rw) 143static inline void __raw_read_lock(raw_rwlock_t *rw)
160{ 144{
161 unsigned long tmp, tmp2; 145 unsigned long tmp, tmp2;
162 146
@@ -173,7 +157,7 @@ static inline void _raw_read_lock(rwlock_t *rw)
173 smp_mb(); 157 smp_mb();
174} 158}
175 159
176static inline void _raw_read_unlock(rwlock_t *rw) 160static inline void __raw_read_unlock(rwlock_t *rw)
177{ 161{
178 unsigned long tmp, tmp2; 162 unsigned long tmp, tmp2;
179 163
@@ -190,6 +174,6 @@ static inline void _raw_read_unlock(rwlock_t *rw)
190 : "cc"); 174 : "cc");
191} 175}
192 176
193#define _raw_read_trylock(lock) generic_raw_read_trylock(lock) 177#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
194 178
195#endif /* __ASM_SPINLOCK_H */ 179#endif /* __ASM_SPINLOCK_H */