diff options
Diffstat (limited to 'include/asm-arm/spinlock.h')
-rw-r--r-- | include/asm-arm/spinlock.h | 50 |
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 @@ * Unlocked value: 0 * Locked value: 1 */ -typedef struct { - volatile unsigned int lock; -#ifdef CONFIG_PREEMPT - unsigned int break_lock; -#endif -} spinlock_t; -#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 } +#define __raw_spin_is_locked(x) ((x)->lock != 0) +#define __raw_spin_unlock_wait(lock) \ + do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0) -#define spin_lock_init(x) do { *(x) = SPIN_LOCK_UNLOCKED; } while (0) -#define spin_is_locked(x) ((x)->lock != 0) -#define spin_unlock_wait(x) do { barrier(); } while (spin_is_locked(x)) -#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock) +#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock) -static inline void _raw_spin_lock(spinlock_t *lock) +static inline void __raw_spin_lock(raw_spinlock_t *lock) { unsigned long tmp; @@ -47,7 +40,7 @@ static inline void _raw_spin_lock(spinlock_t *lock) smp_mb(); } -static inline int _raw_spin_trylock(spinlock_t *lock) +static inline int __raw_spin_trylock(raw_spinlock_t *lock) { unsigned long tmp; @@ -67,7 +60,7 @@ static inline int _raw_spin_trylock(spinlock_t *lock) } } -static inline void _raw_spin_unlock(spinlock_t *lock) +static inline void __raw_spin_unlock(raw_spinlock_t *lock) { smp_mb(); @@ -80,23 +73,14 @@ static inline void _raw_spin_unlock(spinlock_t *lock) /* * RWLOCKS - */ -typedef struct { - volatile unsigned int lock; -#ifdef CONFIG_PREEMPT - unsigned int break_lock; -#endif -} rwlock_t; - -#define RW_LOCK_UNLOCKED (rwlock_t) { 0 } -#define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while (0) -#define rwlock_is_locked(x) (*((volatile unsigned int *)(x)) != 0) - -/* + * + * * Write locks are easy - we just set bit 31. When unlocking, we can * just write zero since the lock is exclusively held. */ -static inline void _raw_write_lock(rwlock_t *rw) +#define rwlock_is_locked(x) (*((volatile unsigned int *)(x)) != 0) + +static inline void __raw_write_lock(rwlock_t *rw) { unsigned long tmp; @@ -113,7 +97,7 @@ static inline void _raw_write_lock(rwlock_t *rw) smp_mb(); } -static inline int _raw_write_trylock(rwlock_t *rw) +static inline int __raw_write_trylock(rwlock_t *rw) { unsigned long tmp; @@ -133,7 +117,7 @@ static inline int _raw_write_trylock(rwlock_t *rw) } } -static inline void _raw_write_unlock(rwlock_t *rw) +static inline void __raw_write_unlock(raw_rwlock_t *rw) { smp_mb(); @@ -156,7 +140,7 @@ static inline void _raw_write_unlock(rwlock_t *rw) * currently active. However, we know we won't have any write * locks. */ -static inline void _raw_read_lock(rwlock_t *rw) +static inline void __raw_read_lock(raw_rwlock_t *rw) { unsigned long tmp, tmp2; @@ -173,7 +157,7 @@ static inline void _raw_read_lock(rwlock_t *rw) smp_mb(); } -static inline void _raw_read_unlock(rwlock_t *rw) +static inline void __raw_read_unlock(rwlock_t *rw) { unsigned long tmp, tmp2; @@ -190,6 +174,6 @@ static inline void _raw_read_unlock(rwlock_t *rw) : "cc"); } -#define _raw_read_trylock(lock) generic_raw_read_trylock(lock) +#define __raw_read_trylock(lock) generic__raw_read_trylock(lock) #endif /* __ASM_SPINLOCK_H */ |