drm: remove drm_driver::gem_free_object

No drivers set the callback, so remove it all together.
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20200515095118.2743122-10-emil.l.velikov@gmail.com

drivers/gpu/drm/drm_gem.c

@@ -975,15 +975,10 @@ drm_gem_object_free(struct kref *kref)
 		container_of(kref, struct drm_gem_object, refcount);
 	struct drm_device *dev = obj->dev;
 
-	if (obj->funcs) {
+	if (obj->funcs)
 		obj->funcs->free(obj);
-	} else if (dev->driver->gem_free_object_unlocked) {
+	else if (dev->driver->gem_free_object_unlocked)
 		dev->driver->gem_free_object_unlocked(obj);
-	} else if (dev->driver->gem_free_object) {
-		WARN_ON(!mutex_is_locked(&dev->struct_mutex));
-
-		dev->driver->gem_free_object(obj);
-	}
 }
 EXPORT_SYMBOL(drm_gem_object_free);
 
@@ -999,21 +994,10 @@ EXPORT_SYMBOL(drm_gem_object_free);
 void
 drm_gem_object_put_unlocked(struct drm_gem_object *obj)
 {
-	struct drm_device *dev;
-
 	if (!obj)
 		return;
 
-	dev = obj->dev;
-
-	if (dev->driver->gem_free_object) {
-		might_lock(&dev->struct_mutex);
-		if (kref_put_mutex(&obj->refcount, drm_gem_object_free,
-				&dev->struct_mutex))
-			mutex_unlock(&dev->struct_mutex);
-	} else {
-		kref_put(&obj->refcount, drm_gem_object_free);
-	}
+	kref_put(&obj->refcount, drm_gem_object_free);
 }
 EXPORT_SYMBOL(drm_gem_object_put_unlocked);
 

include/drm/drm_drv.h

@@ -327,14 +327,6 @@ struct drm_driver {
 	 */
 	void (*debugfs_init)(struct drm_minor *minor);
 
-	/**
-	 * @gem_free_object: deconstructor for drm_gem_objects
-	 *
-	 * This is deprecated and should not be used by new drivers. Use
-	 * &drm_gem_object_funcs.free instead.
-	 */
-	void (*gem_free_object) (struct drm_gem_object *obj);
-
 	/**
 	 * @gem_free_object_unlocked: deconstructor for drm_gem_objects
 	 *

include/drm/drm_gem.h

@@ -272,8 +272,9 @@ struct drm_gem_object {
 	 * attachment point for the device. This is invariant over the lifetime
 	 * of a gem object.
 	 *
-	 * The &drm_driver.gem_free_object callback is responsible for cleaning
-	 * up the dma_buf attachment and references acquired at import time.
+	 * The &drm_driver.gem_free_object_unlocked callback is responsible for
+	 * cleaning up the dma_buf attachment and references acquired at import
+	 * time.
 	 *
 	 * Note that the drm gem/prime core does not depend upon drivers setting
 	 * this field any more. So for drivers where this doesn't make sense