linux-kernel - Re: [PATCH 1/9] Squashfs: move zlib decompression wrapper code into a separate file

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Date:	Thu, 10 Dec 2009 21:17:31 +0000
From:	Phillip Lougher <phillip@...gher.demon.co.uk>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
CC:	dedekind1@...il.com, Andrew Morton <akpm@...ux-foundation.org>,
	linux-embedded@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, phillip.lougher@...il.com,
	Tim Bird <tim.bird@...sony.com>,
	Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>,
	Felix Fietkau <nbd@...nwrt.org>
Subject: Re: [PATCH 1/9] Squashfs: move zlib decompression wrapper code into
 a 	separate file

Geert Uytterhoeven wrote:
> 
>> Yes I did consider using the cryptoapi, but this doesn't have support for
>> lzma in mainline.
> 
> IIRC, Felix Fietkau added support for that for OpenWRT...
> 

Yes, but it isn't in mainline, and OpenWRT don't appear to have tried to submit
it.  IMHO the major problem with their patch is it uses a second private copy
of lzma, rather than being a wrapper around the pre-existing lzma implementation.
I don't think it's going to be easy to get a second lzma implementation accepted
into mainline, when it took so long to get one accepted.  I have nothing against
the cryptoapi, but it doesn't seem likely to be getting lzma support anytime soon.

As I previously said my aim is to use the pre-existing lzma implementation.  Unless
it is stupendously bad (which it isn't), that seems to be the quickest, easiest and
best way to get lzma support into Squashfs.

Phillip

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