linux-kernel - Re: [PATCH 7/10] i386 sg: add support for chaining scatterlists

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Message-Id: <20070509031915.6e934f35.akpm@linux-foundation.org>
Date:	Wed, 9 May 2007 03:19:15 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	jens.axboe@...cle.com (Jens Axboe), linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/10] i386 sg: add support for chaining scatterlists

On Wed, 09 May 2007 20:03:29 +1000 Herbert Xu <herbert@...dor.apana.org.au> wrote:

> Jens Axboe <jens.axboe@...cle.com> wrote:
> > 
> > diff --git a/include/asm-i386/scatterlist.h b/include/asm-i386/scatterlist.h
> > index d7e45a8..794b68c 100644
> > --- a/include/asm-i386/scatterlist.h
> > +++ b/include/asm-i386/scatterlist.h
> > @@ -8,8 +8,11 @@ struct scatterlist {
> >     unsigned int       offset;
> >     dma_addr_t         dma_address;
> >     unsigned int       length;
> > +    struct scatterlist *next;
> > };
> 
> BTW, the crypto layer's scatterlist already has a chaining mechanism
> using the existing structure.  The only difference is that the chained
> pointer is stored inside the 'struct page *' rather than a new pointer.

<greps-and-fails>

Which field in the page is it using?
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