Re: [PATCH] crypto: add alignment handling to digest layer

[Herbert Xu]

On Tue, Apr 04, 2006 at 12:04:07AM +0900, Atsushi Nemoto wrote:
>
> @@ -38,12 +39,24 @@ static void update(struct crypto_tfm *tf
>  			unsigned int bytes_from_page = min(l, ((unsigned int)
>  							   (PAGE_SIZE)) - 
>  							   offset);
> -			char *p = crypto_kmap(pg, 0) + offset;
> +			char *src = crypto_kmap(pg, 0);
> +			char *p = src + offset;
>  
> +			if (unlikely(offset & alignmask)) {
> +				unsigned int bytes =
> +					alignmask + 1 - (offset & alignmask);
> +				bytes = min(bytes, bytes_from_page);
> +				tfm->__crt_alg->cra_digest.dia_update
> +						(crypto_tfm_ctx(tfm), p,
> +						 bytes);

Don't we need to copy this to an aligned buffer?

Thanks,
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