linux-kernel - Re: [PATCH v7 2/4] riscv: Checksum header

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Message-ID: <ZTmGl36A3X1UtnNu@ghost>
Date:   Wed, 25 Oct 2023 14:20:23 -0700
From:   Charlie Jenkins <charlie@...osinc.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     "Wang, Xiao W" <xiao.w.wang@...el.com>,
        Linux-Arch <linux-arch@...r.kernel.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Conor Dooley <conor@...nel.org>,
        David Laight <David.Laight@...lab.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>
Subject: Re: [PATCH v7 2/4] riscv: Checksum header

On Wed, Oct 25, 2023 at 11:18:40PM +0200, Arnd Bergmann wrote:
> On Wed, Oct 25, 2023, at 23:11, Charlie Jenkins wrote:
> >
> > Thank you for pointing that out, I had not realized that macro existed.
> > Since riscv keeps NET_IP_ALIGN at 0 it should be expected that
> > ip_fast_csum is only called with 32-bit aligned addresses. I will update
> > the comment and refer to that macro. riscv supports misaligned accesses
> > but there are no guarantees of speed.
> 
> Just to clarify for your comment: riscv gets the default value of '2',
> which is the one that makes the header aligned.
> 
>       Arnd

Oops, typo. I meant to write 2.

- Charlie