linux-kernel - Re: [PATCH 6/9] PCI: consolidate PCI config entry in drivers/pci

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Message-ID: <20181108224540.GG41183@google.com>
Date:   Thu, 8 Nov 2018 16:45:41 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Matt Porter <mporter@...nel.crashing.org>,
        Alexandre Bounine <alex.bou9@...il.com>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        linux-kbuild@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-pci@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 6/9] PCI: consolidate PCI config entry in drivers/pci

On Fri, Oct 19, 2018 at 02:09:49PM +0200, Christoph Hellwig wrote:
> There is no good reason to duplicate the PCI menu in every architecture.
> Instead provide a selectable HAVE_PCI symbol that indicates availability
> of PCI support and the handle the rest in drivers/pci.
> 
> Note that for powerpc we now select HAVE_PCI globally instead of the
> convoluted mess of conditional or or non-conditional support per board,
> similar to what we do e.g. on x86.  For alpha PCI is selected for the
> non-jensen configs as it was the default before, and a lot of code does
> not compile without PCI enabled.  On other architectures with limited
> PCI support that wasn't as complicated I've left the selection as-is.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>
> Acked-by: Max Filippov <jcmvbkbc@...il.com>
> Acked-by: Thomas Gleixner <tglx@...utronix.de>
> Acked-by: Bjorn Helgaas <bhelgaas@...gle.com>

Sounds like Masahiro plans to take this series and I'm fine with that.
Minor typo below, since it sounds like there's another revision coming.

> --- a/drivers/pci/Kconfig
> +++ b/drivers/pci/Kconfig
> @@ -3,6 +3,18 @@
>  # PCI configuration
>  #
>  
> +config HAVE_PCI
> +	bool
> +
> +menuconfig PCI
> +	bool "PCI support"
> +	depends on HAVE_PCI
> +
> +	help
> +	  This option enables support for the PCI local bus, including
> +	  support for PCI-X and the fundations for PCI Express support.

s/fundations/foundations/

> +	  Say 'Y' here unless you know what you are doing.
> +
>  source "drivers/pci/pcie/Kconfig"