1 files changed, 12 insertions, 1 deletions

diff --git a/include/asm-sh/spinlock.h b/include/asm-sh/spinlock.h
index 846322d4c35d..2586eef07d57 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 */