backlight: Convert semaphore -> mutex

Convert internal semaphore to a mutex

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

2 files changed, 5 insertions, 5 deletions

diff --git a/include/linux/backlight.h b/include/linux/backlight.h
index d1426b852bdf..43c6d55644b5 100644
--- 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 */
diff --git a/include/linux/lcd.h b/include/linux/lcd.h
index bfbf6552eb51..46970af2ca89 100644
--- a/include/linux/lcd.h
+++ b/include/linux/lcd.h
@@ -14,7 +14,7 @@
 
 /* Notes on locking:
  *
- * lcd_device->sem is an internal backlight lock protecting the props
+ * lcd_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 set_power() is serialised by the update_lock mutex since
@@ -52,7 +52,7 @@ struct lcd_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 lcd_properties *props;
         /* Serialise access to set_power method */