drm: kill drm_mm_node->private

Only ever assigned, never used.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[glisse: I will re-add if needed for range-restricted allocations]
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/i915/i915_gem.c

@@ -2633,10 +2633,8 @@ i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment)
 	if (free_space != NULL) {
 		obj_priv->gtt_space = drm_mm_get_block(free_space, obj->size,
 						       alignment);
-		if (obj_priv->gtt_space != NULL) {
-			obj_priv->gtt_space->private = obj;
+		if (obj_priv->gtt_space != NULL)
 			obj_priv->gtt_offset = obj_priv->gtt_space->start;
-		}
 	}
 	if (obj_priv->gtt_space == NULL) {
 		/* If the gtt is empty and we're still having trouble

drivers/gpu/drm/ttm/ttm_bo.c

@@ -476,7 +476,6 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all)
 			++put_count;
 		}
 		if (bo->mem.mm_node) {
-			bo->mem.mm_node->private = NULL;
 			drm_mm_put_block(bo->mem.mm_node);
 			bo->mem.mm_node = NULL;
 		}
@@ -670,7 +669,6 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
 			printk(KERN_ERR TTM_PFX "Buffer eviction failed\n");
 		spin_lock(&glob->lru_lock);
 		if (evict_mem.mm_node) {
-			evict_mem.mm_node->private = NULL;
 			drm_mm_put_block(evict_mem.mm_node);
 			evict_mem.mm_node = NULL;
 		}
@@ -929,8 +927,6 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
 		mem->mm_node = node;
 		mem->mem_type = mem_type;
 		mem->placement = cur_flags;
-		if (node)
-			node->private = bo;
 		return 0;
 	}
 
@@ -973,7 +969,6 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
 						interruptible, no_wait_reserve, no_wait_gpu);
 		if (ret == 0 && mem->mm_node) {
 			mem->placement = cur_flags;
-			mem->mm_node->private = bo;
 			return 0;
 		}
 		if (ret == -ERESTARTSYS)
@@ -1029,7 +1024,6 @@ int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
 out_unlock:
 	if (ret && mem.mm_node) {
 		spin_lock(&glob->lru_lock);
-		mem.mm_node->private = NULL;
 		drm_mm_put_block(mem.mm_node);
 		spin_unlock(&glob->lru_lock);
 	}

drivers/gpu/drm/ttm/ttm_bo_util.c

@@ -353,8 +353,6 @@ static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
 	fbo->vm_node = NULL;
 
 	fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj);
-	if (fbo->mem.mm_node)
-		fbo->mem.mm_node->private = (void *)fbo;
 	kref_init(&fbo->list_kref);
 	kref_init(&fbo->kref);
 	fbo->destroy = &ttm_transfered_destroy;

include/drm/drm_mm.h

@@ -48,7 +48,6 @@ struct drm_mm_node {
 	unsigned long start;
 	unsigned long size;
 	struct drm_mm *mm;
-	void *private;
 };
 
 struct drm_mm {