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    Subject[patch 2.6.13 0/6] swiotlb maintenance and x86_64 dma_sync_single_range_for_{cpu,device}
    Conduct some maintenance of the swiotlb code:

    -- Move the code from arch/ia64/lib to lib

    -- Cleanup some cruft (code duplication)

    -- Add support for syncing sub-ranges of mappings

    -- Add support for syncing DMA_BIDIRECTIONAL mappings

    -- Comment fixup & change record

    Also, tack-on an x86_64 implementation of dma_sync_single_range_for_cpu
    and dma_sync_single_range_for _device. This makes use of the new
    swiotlb sync sub-range support.

    Patches to follow...
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