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From:   "Jason A. Donenfeld" <Jason@zx2c4.com>
Date:   Fri, 26 Nov 2021 10:26:09 -0500
Message-ID: <CAHmME9q3ihG6OukcbhgkzwMUY7y+N3tKrGu2aRHjkgmAv4j=WQ@mail.gmail.com>
Subject: Re: [PATCH] crypto: siphash - use _unaligned version by default
To:     Arnd Bergmann <arnd@kernel.org>
Cc:     Linux Crypto Mailing List <linux-crypto@vger.kernel.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Nathan Chancellor <nathan@kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>,
        "David S. Miller" <davem@davemloft.net>,
        Jean-Philippe Aumasson <jeanphilippe.aumasson@gmail.com>,
        LKML <linux-kernel@vger.kernel.org>, llvm@lists.linux.dev
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On Fri, Nov 26, 2021 at 10:18 AM Arnd Bergmann <arnd@kernel.org> wrote:
> I have not tested this specific patch on all platforms, but I did
> extensive testing of the get_unaligned()/put_unaligned() helpers
> in my rewrite earlier this year[1], making sure that these are NOPs
> on all the important architectures, and that they prevent the use
> of trapping ldrd/ldm instructions on ARMv6/ARMv7.

If you're confident that the codegen doesn't change for ARMv8 and
x86{,_64}, then:

Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com>

We should probably Cc stable@, right?

I'm preparing a patchset for DaveM's stable tree today, and I can take
this in that patchset.

Jason