X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-sh%2Fspinlock.h;h=2586eef07d57214ec977f50b818d61c1c0fff9ed;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=846322d4c35d489daf86e337518dbee79f5c738f;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git

diff --git a/include/asm-sh/spinlock.h b/include/asm-sh/spinlock.h
index 846322d4c..2586eef07 100644
--- a/include/asm-sh/spinlock.h
+++ b/include/asm-sh/spinlock.h
@@ -88,7 +88,14 @@ static inline void __raw_write_unlock(raw_rwlock_t *rw)
 	__raw_spin_unlock(&rw->lock);
 }
 
-#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
+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)
 {
@@ -100,4 +107,8 @@ static inline int __raw_write_trylock(raw_rwlock_t *rw)
 	return 0;
 }
 
+#define _raw_spin_relax(lock)	cpu_relax()
+#define _raw_read_relax(lock)	cpu_relax()
+#define _raw_write_relax(lock)	cpu_relax()
+
 #endif /* __ASM_SH_SPINLOCK_H */