linux-kernel - Re: [RFC] [PATCH 2/7] crypto: authenc

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Message-ID: <20090720085004.GA5018@gondor.apana.org.au>
Date:	Mon, 20 Jul 2009 16:50:04 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Steffen Klassert <steffen.klassert@...unet.com>
Cc:	David Miller <davem@...emloft.net>, linux-crypto@...r.kernel.org,
	netdev@...r.kernel.org, Jens Axboe <jens.axboe@...cle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] [PATCH 2/7] crypto: authenc - convert to ahash

On Mon, Jul 20, 2009 at 10:36:40AM +0200, Steffen Klassert wrote:
> 
> For the crypto-layer it's just scatterwalk_sg_chain() that removes the
> termination bit. 

The history behind this is that the crypto layer has used chaining
way before generic chaining was invented.  When the generic code
was added I tried to convert crypto over to that, however, that
failed because generic chaining was not ported to every architecture.

So that's why the crypto layer still retains its own chaining.

> For the block-layer it's blk_rq_map_integrity_sg() and two times in
> blk_rq_map_sg().

I suppose we should ask Jens whether he thinks this is worth adding
an interface over?

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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