linux-kernel - Re: [PATCH 4/8] pci: consolidate PCI config entry in drivers/pci

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Message-ID: <20181015085737.GC27159@lst.de>
Date:   Mon, 15 Oct 2018 10:57:37 +0200
From:   Christoph Hellwig <hch@....de>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     Christoph Hellwig <hch@....de>, mporter@...nel.crashing.org,
        alex.bou9@...il.com,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.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>
Subject: Re: [PATCH 4/8] pci: consolidate PCI config entry in drivers/pci

On Mon, Oct 15, 2018 at 03:37:05PM +0900, Masahiro Yamada wrote:
> I think HAVE_ is a preferred prefix in this case according to this doc:
> https://github.com/masahir0y/linux/blob/v4.19-rc4/Documentation/kbuild/kconfig-language.txt#L448

Ok, I'll switch everything to HAVE_*

> If you do this for entire powerpc,
> the other 'select HAS_PCI' addtions to
> arch/powerpc/platforms/*/Kconfig look redundant.

I'll drop them.

> > -config PCI
> > -       bool "PCI support"
> > -       select PCI_MSI
> 
> 
> I think this 'select PCI_MSI' for riscv was lost.

Indeed, fixed.

> >  menu "Bus options (PCI etc.)"
> >
> > -config PCI
> > -       bool "PCI support"
> > -       default y
> 
> 
> The default is y for x86 (and xtensa as well).
> 
> With this patch, the default will be flipped.
> 
> I think most of people want to use PCI for x86,
> and this change will make people upset.
> 
> Will you update arch/{x86,xtensa}/configs/*_defconfig?

Yes.  Alternatively we could add a new ARCH_PCI_DEFAULT symbol,
that architectures could select if they want PCI by default.  Does
anyone thing this is a good idea?