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Diffstat (limited to 'include/asm-sh/spinlock.h')
-rw-r--r--include/asm-sh/spinlock.h61
1 files changed, 20 insertions, 41 deletions
diff --git a/include/asm-sh/spinlock.h b/include/asm-sh/spinlock.h
index e770b55649eb..846322d4c35d 100644
--- a/include/asm-sh/spinlock.h
+++ b/include/asm-sh/spinlock.h
@@ -15,20 +15,11 @@
/*
* Your basic SMP spinlocks, allowing only a single CPU anywhere
*/
-typedef struct {
- volatile unsigned long lock;
-#ifdef CONFIG_PREEMPT
- unsigned int break_lock;
-#endif
-} spinlock_t;
-#define SPIN_LOCK_UNLOCKED (spinlock_t) { 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_is_locked(x) ((x)->lock != 0)
+#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
+#define __raw_spin_unlock_wait(x) \
+ do { cpu_relax(); } while (__raw_spin_is_locked(x))
/*
* Simple spin lock operations. There are two variants, one clears IRQ's
@@ -36,7 +27,7 @@ typedef struct {
*
* We make no fairness assumptions. They have a cost.
*/
-static inline void _raw_spin_lock(spinlock_t *lock)
+static inline void __raw_spin_lock(raw_spinlock_t *lock)
{
__asm__ __volatile__ (
"1:\n\t"
@@ -49,14 +40,14 @@ static inline void _raw_spin_lock(spinlock_t *lock)
);
}
-static inline void _raw_spin_unlock(spinlock_t *lock)
+static inline void __raw_spin_unlock(raw_spinlock_t *lock)
{
assert_spin_locked(lock);
lock->lock = 0;
}
-#define _raw_spin_trylock(x) (!test_and_set_bit(0, &(x)->lock))
+#define __raw_spin_trylock(x) (!test_and_set_bit(0, &(x)->lock))
/*
* Read-write spinlocks, allowing multiple readers but only one writer.
@@ -66,51 +57,40 @@ static inline void _raw_spin_unlock(spinlock_t *lock)
* needs to get a irq-safe write-lock, but readers can get non-irqsafe
* read-locks.
*/
-typedef struct {
- spinlock_t lock;
- atomic_t counter;
-#ifdef CONFIG_PREEMPT
- unsigned int break_lock;
-#endif
-} rwlock_t;
-
-#define RW_LOCK_BIAS 0x01000000
-#define RW_LOCK_UNLOCKED (rwlock_t) { { 0 }, { RW_LOCK_BIAS } }
-#define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while (0)
-
-static inline void _raw_read_lock(rwlock_t *rw)
+
+static inline void __raw_read_lock(raw_rwlock_t *rw)
{
- _raw_spin_lock(&rw->lock);
+ __raw_spin_lock(&rw->lock);
atomic_inc(&rw->counter);
- _raw_spin_unlock(&rw->lock);
+ __raw_spin_unlock(&rw->lock);
}
-static inline void _raw_read_unlock(rwlock_t *rw)
+static inline void __raw_read_unlock(raw_rwlock_t *rw)
{
- _raw_spin_lock(&rw->lock);
+ __raw_spin_lock(&rw->lock);
atomic_dec(&rw->counter);
- _raw_spin_unlock(&rw->lock);
+ __raw_spin_unlock(&rw->lock);
}
-static inline void _raw_write_lock(rwlock_t *rw)
+static inline void __raw_write_lock(raw_rwlock_t *rw)
{
- _raw_spin_lock(&rw->lock);
+ __raw_spin_lock(&rw->lock);
atomic_set(&rw->counter, -1);
}
-static inline void _raw_write_unlock(rwlock_t *rw)
+static inline void __raw_write_unlock(raw_rwlock_t *rw)
{
atomic_set(&rw->counter, 0);
- _raw_spin_unlock(&rw->lock);
+ __raw_spin_unlock(&rw->lock);
}
-#define _raw_read_trylock(lock) generic_raw_read_trylock(lock)
+#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
-static inline int _raw_write_trylock(rwlock_t *rw)
+static inline int __raw_write_trylock(raw_rwlock_t *rw)
{
if (atomic_sub_and_test(RW_LOCK_BIAS, &rw->counter))
return 1;
@@ -121,4 +101,3 @@ static inline int _raw_write_trylock(rwlock_t *rw)
}
#endif /* __ASM_SH_SPINLOCK_H */
-