linux-kernel - Re: [PATCH] lib: Add CRC64 ECMA module

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Date:	Mon, 29 Jul 2013 15:22:47 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Chereji Marian-Cornel-R27762 <R27762@...escale.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Grigore Sebastian-SGRIGOR1 <sgrigor1@...escale.com>,
	Schmitt Richard-B43082 <B43082@...escale.com>,
	Fleming Andy-AFLEMING <afleming@...escale.com>
Subject: Re: [PATCH] lib: Add CRC64 ECMA module

On Mon, 29 Jul 2013 11:49:31 +0000 Chereji Marian-Cornel-R27762 <R27762@...escale.com> wrote:

> -----Original Message-----
> From: Andrew Morton [mailto:akpm@...ux-foundation.org] 
> Sent: Saturday, July 27, 2013 1:01 AM
> To: Chereji Marian-Cornel-R27762
> Cc: linux-kernel@...r.kernel.org; Grigore Sebastian-SGRIGOR1; Schmitt Richard-B43082; Fleming Andy-AFLEMING
> Subject: Re: [PATCH] lib: Add CRC64 ECMA module
> 
> On Fri, 12 Jul 2013 11:56:26 +0300 Marian Chereji <marian.chereji@...escale.com> wrote:
> 
> > Added implementation of CRC64 ECMA checksum.
> > 
> > Signed-off-by: Marian Chereji <marian.chereji@...escale.com>
> > Reviewed-by: Varvara Andrei-B21317 <andrei.varvara@...escale.com>
> > Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@...escale.com>
> > ---
> >  include/linux/crc64_ecma.h |   56 +++++++
> >  lib/Kconfig                |    7 +
> >  lib/Makefile               |    1 +
> >  lib/crc64_ecma.c           |  341 ++++++++++++++++++++++++++++++++++++++++++++
> > 
> > Presumably you have some code which will need this library feature?
> > 
> > What code is that, and what is its status?
> > 
>
> Hi Andrew,
> 
> we have an IP Acceleration driver for Freescale network processors
> which is using this CRC64. However, it still needs some work in
> order for it to become upstreamable.
> 
> Thought this CRC64 could helps others in the meantime since it doesn't
> have anything specific to do with our driver.

Please don't top-post - it makes it very hard to conduct a conversation.

I don't think it's generally desirable to put code into lib/ unless we
have an in-kernel user: it consumes resources and is untestable.  From
a quick grep I don't see any current in-kernel code which might use
this.

So I'd propose that I keep this patch in -mm to get a bit of exposure
and compilation testing and wait until the first user comes along, OK?

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