On Thu, 2006-03-02 at 17:09 +0000, Christoph Hellwig wrote:
> For each sg list entry do something like:
>
> buffer = kmap_atomic(sg->page, KM_USER0) + sg->offset;
> <access buffer>
> kunmap_atomic(buffer - sg->offset, KM_USER0);
Remember too that the data might not necessarily be valid without a
flush depending on where it has come from (or where it is going). See
the dma_sync_sg_for_device/cpu.
James
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