linux-kernel - Re: [PATCH 2/9] arm: remove EISA kconfig option

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Date:   Fri, 19 Oct 2018 21:56:34 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Christoph Hellwig <hch@....de>
Cc:     mporter@...nel.crashing.org, Alex Bounine <alex.bou9@...il.com>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-pci@...r.kernel.org, linux-scsi <linux-scsi@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        Russell King <linux@...linux.org.uk>
Subject: Re: [PATCH 2/9] arm: remove EISA kconfig option

On Fri, Oct 19, 2018 at 9:10 PM Christoph Hellwig <hch@....de> wrote:
>
> No arm config enables EISA, and arm does not include drivers/eisa/Kconfig
> which provides support for things like PCI to EISA bridges, so it is most
> likely dead.
>
> If this is wrong we will be able to resurrect it easily by selecting
> HAVE_EISA for the right arm configs after this series.

What is your concern?

This absolutely looks dead to me.


> Suggested-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
>  arch/arm/Kconfig | 15 ---------------
>  1 file changed, 15 deletions(-)
>
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index e8cd55a5b04c..e33735ce1c14 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -165,21 +165,6 @@ config HAVE_PROC_CPU
>  config NO_IOPORT_MAP
>         bool
>
> -config EISA
> -       bool

There is no prompt for this symbol.
Hence, there is no way for a user to enable this directly.

'select EISA' is the only way to enable it.

git grep 'select EISA'
gave no hit.

So, we can say it is dead.





> -       ---help---
> -         The Extended Industry Standard Architecture (EISA) bus was
> -         developed as an open alternative to the IBM MicroChannel bus.
> -
> -         The EISA bus provided some of the features of the IBM MicroChannel
> -         bus while maintaining backward compatibility with cards made for
> -         the older ISA bus.  The EISA bus saw limited use between 1988 and
> -         1995 when it was made obsolete by the PCI bus.
> -
> -         Say Y here if you are building a kernel for an EISA-based machine.
> -
> -         Otherwise, say N.
> -
>  config SBUS
>         bool



I guess the situation is the same as powerpc.

The difference between arm and powerpc is the presence of help.

You fold the powerpc change in 9/9.


-- 
Best Regards
Masahiro Yamada