ttm_mem_io_reserve
int ttm_mem_io_reserve(struct ttm_device *bdev,
ret = ttm_mem_io_reserve(bo->bdev, bo->resource);
ret = ttm_mem_io_reserve(bo->bdev, mem);
err = ttm_mem_io_reserve(bdev, bo->resource);
err = ttm_mem_io_reserve(bdev, bo->resource);
ret = ttm_mem_io_reserve(bdev, mem);