linux-kernel - Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC32c algorithm by new crypto API.

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Message-ID: <20080804102557.GA21265@Chamillionaire.breakpoint.cc>
Date:	Mon, 4 Aug 2008 12:25:57 +0200
From:	Sebastian Siewior <linux-crypto@...breakpoint.cc>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	Austin Zhang <austin_zhang@...ux.intel.com>,
	herbert@...dor.apana.org.au, davem@...emloft.net,
	linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org
Subject: Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC32c
	algorithm by new crypto API.

* David Woodhouse | 2008-08-04 11:12:05 [+0100]:

>On Mon, 2008-08-04 at 05:35 -0400, Austin Zhang wrote:
>> +u32 __pure crc32c_intel_le_hw(u32 crc, unsigned char const *p, size_t
>> len)
>> +{
>> +       unsigned int iquotient = len / SCALE_F;
>> +       unsigned int iremainder = len % SCALE_F;
>> +#ifdef CONFIG_X86_64
>> +       u64 *ptmp = (u64 *)p;
>> +#else
>> +       u32 *ptmp = (u32 *)p;
>> +#endif
>
>You could perhaps just use 'unsigned long' here, to avoid the ifdef.
>
>And it would be nice if we could make libcrc32c use this too, rather
>than just the 'crypto' users.

I'm not sure if I remeber correctly but I thing Herbert was planning to
convert all users over to the crypto API to avoid compile time
dependency.

Sebastian
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