linux-kernel - Re: [PATCH 6/7 v5] sh: fix Kconfig entry for NUMA => SMP

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Date:   Tue, 21 Mar 2023 09:42:37 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
Cc:     Randy Dunlap <rdunlap@...radead.org>, linux-kernel@...r.kernel.org,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>, linux-sh@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH 6/7 v5] sh: fix Kconfig entry for NUMA => SMP

Hi Adrian,

On Tue, Mar 21, 2023 at 9:10 AM John Paul Adrian Glaubitz
<glaubitz@...sik.fu-berlin.de> wrote:
> On Tue, 2023-03-21 at 08:55 +0100, Geert Uytterhoeven wrote:
> > On Tue, Mar 21, 2023 at 12:13 AM Randy Dunlap <rdunlap@...radead.org> wrote:
> > > Fix SUPERH builds that select SYS_SUPPORTS_NUMA but do not select
> > > SYS_SUPPORTS_SMP and SMP.
> >
> > Perhaps because these SoCs do not support SMP?
>
> Well, there is actually a dual-core 7786 board available, see:
>
> > https://www.apnet.co.jp/product/superh/ap-sh4ad-0a.html
>
> Quoting:
>
> »The SH7786 is equipped with a dual-core SH-4A and has interfaces such as
>  DDR3 SDRAM, PCI Express, USB, and display unit.«

SH7786 is dual-core...

> FWIW, I just realized we need this for config CPU_SUBTYPE_SH7786 as well.

... and CPU_SUBTYPE_SH7786 selects CPU_SHX3, which selects
SYS_SUPPORTS_SMP and SYS_SUPPORTS_NUMA in turn.
So everything is fine for SH7786.

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