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iommu/dma: Merge the CMA and alloc_pages allocation paths
Instead of having a separate code path for the non-blocking alloc_pages and CMA allocations paths merge them into one. There is a slight behavior change here in that we try the page allocator if CMA fails. This matches what dma-direct and other iommu drivers do and will be needed to use the dma-iommu code on architectures without DMA remapping later on. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Joerg Roedel <jroedel@suse.de>
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Christoph Hellwig
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Joerg Roedel
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May 27, 2019
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