ttm_bo_dma_acc_size
acc_size = ttm_bo_dma_acc_size(&adev->mman.bdev, size,
size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev,
acc_size = ttm_bo_dma_acc_size(&rdev->mman.bdev, size,
EXPORT_SYMBOL(ttm_bo_dma_acc_size);