#define __ASM_SH_SPINLOCK_H
#include <asm/atomic.h>
+#include <asm/spinlock_types.h>
/*
* Your basic SMP spinlocks, allowing only a single CPU anywhere
static inline void __raw_spin_unlock(raw_spinlock_t *lock)
{
- assert_spin_locked(lock);
+ //assert_spin_locked(lock);
lock->lock = 0;
}
__raw_spin_unlock(&rw->lock);
}
-#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
+static inline int __raw_write_can_lock(raw_rwlock_t *rw)
+{
+ return (atomic_read(&rw->counter) == RW_LOCK_BIAS);
+}
+
+static inline int __raw_read_trylock(raw_rwlock_t *lock)
+{
+ atomic_t *count = (atomic_t*)lock;
+ if (atomic_dec_return(count) >= 0)
+ return 1;
+ atomic_inc(count);
+ return 0;
+}
static inline int __raw_write_trylock(raw_rwlock_t *rw)
{