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Christoph Hellwig authored
vio_dma_mapping_ops currently does a lot of indirect calls through dma_iommu_ops, which not only make the code harder to follow but are also expensive in the post-spectre world. Unwind the indirect calls by calling the ppc_iommu_* or iommu_* APIs directly applicable, or just use the dma_iommu_* methods directly where we can. Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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