drm/gem: Use container_of in drm_gem_object_free

Just a random thing I spotted while reading code - better safe than
sorry.

Link: http://mid.gmane.org/1444894601-5200-11-git-send-email-daniel.vetter@ffwll.ch
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 7dc4a8a066a3b3472116c60a3116385e78b71bcd..ab8ea42264f44b727f36b2d59552fdea8a561ecf 100644 (file)
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -763,7 +763,8 @@ EXPORT_SYMBOL(drm_gem_object_release);
 void
 drm_gem_object_free(struct kref *kref)
 {
-       struct drm_gem_object *obj = (struct drm_gem_object *) kref;
+       struct drm_gem_object *obj =
+               container_of(kref, struct drm_gem_object, refcount);
        struct drm_device *dev = obj->dev;
 
        WARN_ON(!mutex_is_locked(&dev->struct_mutex));