linux-kernel - Re: [PATCH crypto v3 0/2] reduce code size from blake2s on m68k and other small platforms

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Message-ID: <CAHmME9rxdksVZkN4DF_GabsEPrSDrKbo1cVQs77B_s-e2jZ64A@mail.gmail.com>
Date:   Wed, 12 Jan 2022 14:18:34 +0100
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        WireGuard mailing list <wireguard@...ts.zx2c4.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>, Theodore Tso <tytso@....edu>,
        Greg KH <gregkh@...uxfoundation.org>,
        Jean-Philippe Aumasson <jeanphilippe.aumasson@...il.com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Herbert Xu <herbert@...dor.apana.org.au>
Subject: Re: [PATCH crypto v3 0/2] reduce code size from blake2s on m68k and
 other small platforms

Hi Geert,

On Wed, Jan 12, 2022 at 12:00 PM Geert Uytterhoeven
<geert@...ux-m68k.org> wrote:
> Thanks for the series!
>
> On m68k:
> add/remove: 1/4 grow/shrink: 0/1 up/down: 4/-4232 (-4228)
> Function                                     old     new   delta
> __ksymtab_blake2s256_hmac                     12       -     -12
> blake2s_init.constprop                        94       -     -94
> blake2s256_hmac                              302       -    -302
> sha1_transform                              4402     582   -3820
> Total: Before=4230537, After=4226309, chg -0.10%
>
> Tested-by: Geert Uytterhoeven <geert@...ux-m68k.org>

Excellent, thanks for the breakdown. So this shaves off ~4k, which was
about what we were shooting for here, so I think indeed this series
accomplishes its goal of counteracting the addition of BLAKE2s.
Hopefully Herbert will apply this series for 5.17.

Jason