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

Herbert Xu
2008-08-04T14:18:42Z

On Mon, Aug 04, 2008 at 05:35:07AM -0400, Austin Zhang wrote:
>
> +static int crc32c_intel_cra_init(struct crypto_tfm *tfm)
> +{
> + u32 *key = crypto_tfm_ctx(tfm);
> +
> + *key = ~0;
> +
> + tfm->crt_ahash.reqsize = sizeof(u32);
> +
> + if (cpu_has_xmm4_2)
> + return 0;
> + else
> + return -1;
> +}

This check needs to be moved to the module init function and
if it fails the module should not register the algorithm.

Cheers,
--
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