Use mutexes instead of semaphores in I2O driver

The I2O driver uses two semaphores as mutexes.  Use the mutex API instead of
the (binary) semaphores.

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/message/i2o/exec-osm.c b/drivers/message/i2o/exec-osm.c
index 5278aad..c13b932 100644
--- a/drivers/message/i2o/exec-osm.c
+++ b/drivers/message/i2o/exec-osm.c
@@ -537,7 +537,7 @@
 	struct device *dev;
 	struct i2o_message *msg;
 
-	down(&c->lct_lock);
+	mutex_lock(&c->lct_lock);
 
 	dev = &c->pdev->dev;
 
@@ -561,7 +561,7 @@
 
 	i2o_msg_post(c, msg);
 
-	up(&c->lct_lock);
+	mutex_unlock(&c->lct_lock);
 
 	return 0;
 };