linux-kernel - Re: [PATCH 0/6] Add an asm-generic cpuinfo

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Date:   Mon, 22 Aug 2022 12:45:52 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Conor Dooley <Conor.Dooley@...rochip.com>
Cc:     Conor Dooley <mail@...chuod.ie>, Michal Simek <monstr@...str.eu>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        "David S. Miller" <davem@...emloft.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>, Arnd Bergmann <arnd@...db.de>,
        Kees Cook <keescook@...omium.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        linux-s390 <linux-s390@...r.kernel.org>,
        Linux-sh list <linux-sh@...r.kernel.org>,
        sparclinux <sparclinux@...r.kernel.org>,
        Linux-Arch <linux-arch@...r.kernel.org>
Subject: Re: [PATCH 0/6] Add an asm-generic cpuinfo_op declaration

Hi Conor,

On Mon, Aug 22, 2022 at 12:05 PM <Conor.Dooley@...rochip.com> wrote:
> On 22/08/2022 10:36, Geert Uytterhoeven wrote:
> > On Sun, Aug 21, 2022 at 1:36 PM Conor Dooley <mail@...chuod.ie> wrote:
> >>   arch/microblaze/include/asm/processor.h | 2 +-
> >>   arch/riscv/include/asm/processor.h      | 1 +
> >>   arch/s390/include/asm/processor.h       | 2 +-
> >>   arch/sh/include/asm/processor.h         | 2 +-
> >>   arch/sparc/include/asm/cpudata.h        | 3 +--
> >>   arch/x86/include/asm/processor.h        | 2 +-
> >>   include/asm-generic/processor.h         | 7 +++++++
> >>   7 files changed, 13 insertions(+), 6 deletions(-)
> >>   create mode 100644 include/asm-generic/processor.h
> >
> > I was a bit surprised not to find fs/proc/cpuinfo.c in the diffstat
> > above. That file already has an external declaration for cpuinfo_op,
> > and uses it rather unconditionally (that is, if CONFIG_PROC_FS=y)
> > on all architectures.
> >
> > So I think you can just move that to include/linux/processor.h, include
> > the latter everywhere, and drop all architecture-specific copies.
>
> This is the sort of thing I was really hoping to hear, so fine by
> me.. When you say "everywhere", I assume you mean in every arch
> and not just the ones listed here that already have it in an arch
> specific header?

Yes, above every user, to silence the sparse "foo was not
declared. Should it be static?" warnings.

Thanks!

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds