linux-kernel - Re: [PATCH] x86: add a crc32 checksum to the kernel image.

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Message-Id: <1201863494.25409.76.camel@localhost.localdomain>
Date:	Fri, 01 Feb 2008 10:58:14 +0000
From:	Ian Campbell <ijc@...lion.org.uk>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	David Newall <davidn@...idnewall.com>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH] x86: add a crc32 checksum to the kernel image.


On Thu, 2008-01-31 at 17:16 -0800, H. Peter Anvin wrote:
> David Newall wrote:
> > Isn't a crc32 calculation already defined?  Yes; in lib/crc32.c.  One is
> > surely enough.
> 
> As long as it can be included in user-space code we should use that one.

I don't think it can. There is a main function surrounded by #ifdef
UNITTEST which might once have worked but now there is far too much
kernel gunk in there (as you might expect).

If I can work up the enthusiasm I might break out the core algorithm
into a separate file that can be used in both the kernel and userspace.

Ian.

-- 
Ian Campbell
Current Noise: Reverend Bizarre - Cirith Ungol

"Would I turn on the gas if my pal Mugsy were in there?"
   "You might, rabbit, you might!"
		-- Looney Tunes, Bugs and Thugs (1954, Friz Freleng)

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