X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=include%2Fasm-sh%2Fspinlock.h;h=2586eef07d57214ec977f50b818d61c1c0fff9ed;hb=b659f44e4e144bae02c5beaba78a37db60783ba2;hp=54458fd2498150ce964e159748faac8339c1f235;hpb=95f3eff6997ae4a6754c1d874ec0a414d97c44d1;p=powerpc.git

diff --git a/include/asm-sh/spinlock.h b/include/asm-sh/spinlock.h
index 54458fd249..2586eef07d 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)
 {