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    SubjectRe: Missing cache flush.
    David Woodhouse wrote:
    > I was pointed at Documentation/DMA-mapping.txt but that doesn't seem very
    > helpful - it's very PCI-specific, and a quick perusal of pci_dma_sync() on
    > i386 shows that it doesn't do what's required anyway.

    What should it do on i386? mb()?

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