On Wed, Oct 17 2007, David Miller wrote:
> From: Jens Axboe <[email protected]>
> Date: Wed, 17 Oct 2007 12:58:40 +0200
>
> > The problem is that you cannot zero the entire sg entry, because then
> > you'd potentially overwrite the chain pointer.
> >
> > I'd propose just adding a
> >
> > sg_dma_address(sg) = 0;
> > sg_dma_len(sg) = 0;
> >
> > there for now, or provide an arch_clear_sg_entry() helper if we need
> > more killed.
>
> The "chain pointer" is indicated by an sg->page with the low
> bit set, but we're explicitly initializing it here to a
> non-chain page pointer value.
>
> What's the problem?
See next mail :-)
--
Jens Axboe
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