Re: [PATCH 3/9] iommu/dma-iommu: Add iommu_dma_copy_reserved_iova, iommu_dma_apply_resv_region to the dma-iommu api

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

On Thu, Apr 11, 2019 at 07:47:32PM +0100, Tom Murphy via iommu wrote:
> +
> +	WARN_ON_ONCE(iommu_dma_reserve_iova(domain, region->start, end) == NULL);

Overly long line..