linux-kernel - Re: [PATCH 6/6] net/ipv6: sr: Switch to using crypto

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Date:   Tue, 26 Jul 2022 19:52:30 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Dmitry Safonov <dima@...sta.com>
Cc:     linux-kernel@...r.kernel.org,
        Dmitry Safonov <0x7f454c46@...il.com>,
        Andy Lutomirski <luto@...capital.net>,
        Ard Biesheuvel <ardb@...nel.org>,
        David Ahern <dsahern@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Biggers <ebiggers@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Francesco Ruggeri <fruggeri@...sta.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Leonard Crestez <cdleonard@...il.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Salam Noureddine <noureddine@...sta.com>,
        netdev@...r.kernel.org, linux-crypto@...r.kernel.org
Subject: Re: [PATCH 6/6] net/ipv6: sr: Switch to using crypto_pool

On Tue, 26 Jul 2022 21:16:00 +0100 Dmitry Safonov wrote:
> The conversion to use crypto_pool has the following upsides:
> - now SR uses asynchronous API which may potentially free CPU cycles and
>   improve performance for of CPU crypto algorithm providers;
> - hash descriptors now don't have to be allocated on boot, but only at
>   the moment SR starts using HMAC and until the last HMAC secret is
>   deleted;
> - potentially reuse ahash_request(s) for different users
> - allocate only one per-CPU scratch buffer rather than a new one for
>   each user
> - have a common API for net/ users that need ahash on RX/TX fast path

Build problems on allmodconfig:

ERROR: modpost: "crypto_pool_reserve_scratch" [net/ipv6/ipv6.ko] undefined!