drm/nouveau: remove unused ttm bo list

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_bo.c

@@ -51,9 +51,6 @@ nouveau_bo_del_ttm(struct ttm_buffer_object *bo)
 	if (nvbo->tile)
 		nv10_mem_expire_tiling(dev, nvbo->tile, NULL);
 
-	spin_lock(&dev_priv->ttm.bo_list_lock);
-	list_del(&nvbo->head);
-	spin_unlock(&dev_priv->ttm.bo_list_lock);
 	kfree(nvbo);
 }
 
@@ -166,9 +163,6 @@ nouveau_bo_new(struct drm_device *dev, struct nouveau_channel *chan,
 	}
 	nvbo->channel = NULL;
 
-	spin_lock(&dev_priv->ttm.bo_list_lock);
-	list_add_tail(&nvbo->head, &dev_priv->ttm.bo_list);
-	spin_unlock(&dev_priv->ttm.bo_list_lock);
 	*pnvbo = nvbo;
 	return 0;
 }

drivers/gpu/drm/nouveau/nouveau_drv.h

@@ -536,8 +536,6 @@ struct drm_nouveau_private {
 		struct drm_global_reference mem_global_ref;
 		struct ttm_bo_global_ref bo_global_ref;
 		struct ttm_bo_device bdev;
-		spinlock_t bo_list_lock;
-		struct list_head bo_list;
 		atomic_t validate_sequence;
 	} ttm;
 

drivers/gpu/drm/nouveau/nouveau_mem.c

@@ -459,8 +459,6 @@ nouveau_mem_init(struct drm_device *dev)
 		return ret;
 	}
 
-	INIT_LIST_HEAD(&dev_priv->ttm.bo_list);
-	spin_lock_init(&dev_priv->ttm.bo_list_lock);
 	spin_lock_init(&dev_priv->tile.lock);
 
 	dev_priv->fb_available_size = dev_priv->vram_size;