linux-kernel - Re: [PATCH] crypto: xor - move __crypto

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Message-ID: <Ysw7cewDUYp1mgEU@zx2c4.com>
Date:   Mon, 11 Jul 2022 17:02:09 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Eric Biggers <ebiggers@...nel.org>
Cc:     linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] crypto: xor - move __crypto_xor into lib/

Hi Eric,

On Sat, Jul 09, 2022 at 02:54:53PM -0700, Eric Biggers wrote:
> From: Eric Biggers <ebiggers@...gle.com>
> 
> CRYPTO_LIB_CHACHA depends on CRYPTO for __crypto_xor, defined in
> crypto/algapi.c.  This is a layering violation because the dependencies
> should only go in the other direction (crypto/ => lib/crypto/).  Also
> the correct dependency would be CRYPTO_ALGAPI, not CRYPTO.  Fix this by
> moving __crypto_xor into lib/xor.c, alongside lib/memneq.c where
> __crypto_memneq was recently moved.
> 
> Note that CRYPTO_LIB_CHACHA_GENERIC selected XOR_BLOCKS, which is
> unrelated and unnecessary.  It was perhaps thought that XOR_BLOCKS was
> needed for __crypto_xor, but that's not the case.

Oh thank goodness. Excellent! Indeed untangling this knot will be a
large improvement.

Reviewed-by: Jason A. Donenfeld <Jason@...c4.com>

Jason