linux-kernel - Re: [PATCH net-next v6 01/23] asm: simd context helper API

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Date:   Fri, 28 Sep 2018 16:01:37 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc:     Joe Perches <joe@...ches.com>, LKML <linux-kernel@...r.kernel.org>,
        Netdev <netdev@...r.kernel.org>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        David Miller <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Samuel Neves <sneves@....uc.pt>,
        Andrew Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-arch@...r.kernel.org
Subject: Re: [PATCH net-next v6 01/23] asm: simd context helper API

On Fri, Sep 28, 2018 at 4:00 PM Ard Biesheuvel
<ard.biesheuvel@...aro.org> wrote:
>
> On 28 September 2018 at 15:59, Jason A. Donenfeld <Jason@...c4.com> wrote:
> > On Fri, Sep 28, 2018 at 3:58 PM Ard Biesheuvel
> > <ard.biesheuvel@...aro.org> wrote:
> >>
> >> On 28 September 2018 at 15:47, Jason A. Donenfeld <Jason@...c4.com> wrote:
> >> > On Fri, Sep 28, 2018 at 10:49 AM Ard Biesheuvel
> >> > <ard.biesheuvel@...aro.org> wrote:
> >> >> >> +typedef enum {
> >> >> >> +       HAVE_NO_SIMD = 1 << 0,
> >> >> >> +       HAVE_FULL_SIMD = 1 << 1,
> >> >> >> +       HAVE_SIMD_IN_USE = 1 << 31
> >> >> >> +} simd_context_t;
> >> >> >> +
> >> >>
> >> >> Oh, and another thing (and I'm surprised checkpatch.pl didn't complain
> >> >> about it): the use of typedef in new code is strongly discouraged.
> >> >> This policy predates my involvement, so perhaps Joe can elaborate on
> >> >> the rationale?
> >> >
> >> > In case it matters, the motivation for making this a typedef is I
> >> > could imagine this at some point turning into a more complicated
> >> > struct on certain platforms and that would make refactoring easier. I
> >> > could just make it `struct simd_context` now with 1 member though...
> >>
> >> Yes that makes sense
> >
> > The rationale for it being a typedef or moving to a struct now?
>
> Yes just switch to a struct.

Okay. No problem with that, but will wait to hear from Joe first.