backlight: Convert semaphore -> mutex

[powerpc.git] / include / linux / backlight.h

diff --git a/include/linux/backlight.h b/include/linux/backlight.h
index d1426b8..43c6d55 100644 (file)
--- a/include/linux/backlight.h
+++ b/include/linux/backlight.h
@@ -14,8 +14,8 @@
 
 /* Notes on locking:
  *
- * backlight_device->sem is an internal backlight lock protecting the props
- * field and no code outside the core should need to touch it.
+ * backlight_device->props_lock is an internal backlight lock protecting the
+ * props field and no code outside the core should need to touch it.
  *
  * Access to update_status() is serialised by the update_lock mutex since
  * most drivers seem to need this and historically get it wrong.
@@ -57,7 +57,7 @@ struct backlight_device {
        /* This protects the 'props' field. If 'props' is NULL, the driver that
           registered this device has been unloaded, and if class_get_devdata()
           points to something in the body of that driver, it is also invalid. */
-       struct semaphore sem;
+       struct mutex props_lock;
        /* If this is NULL, the backing module is unloaded */
        struct backlight_properties *props;
        /* Serialise access to update_status method */