linux-kernel - Re: [PATCH 6/6] arm64: enable RapidIO menu in Kconfig

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Message-ID: <20180731084143.GA4680@arm.com>
Date:   Tue, 31 Jul 2018 09:41:43 +0100
From:   Will Deacon <will.deacon@....com>
To:     Alexei Colin <acolin@....edu>
Cc:     Alexandre Bounine <alex.bou9@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Russell King <linux@...linux.org.uk>,
        John Paul Walters <jwalters@....edu>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/6] arm64: enable RapidIO menu in Kconfig

On Mon, Jul 30, 2018 at 06:50:34PM -0400, Alexei Colin wrote:
> Platforms with a PCI bus will be offered the RapidIO menu since they may
> be want support for a RapidIO PCI device. Platforms without a PCI bus
> that might include a RapidIO IP block will need to "select HAS_RAPIDIO"
> in the platform-/machine-specific "config ARCH_*" Kconfig entry.
> 
> Tested that kernel builds for arm64 with RapidIO subsystem and
> switch drivers enabled, also that the modules load successfully
> on a custom Aarch64 Qemu model.
> 
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Russell King <linux@...linux.org.uk>
> Cc: John Paul Walters <jwalters@....edu>
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-kernel@...r.kernel.org,
> Signed-off-by: Alexei Colin <acolin@....edu>
> ---
>  arch/arm64/Kconfig | 2 ++
>  1 file changed, 2 insertions(+)

Thanks, this looks much cleaner than before:

Acked-by: Will Deacon <will.deacon@....com>

The only thing I'm not sure about is why we don't just select HAS_RAPIDIO
unconditionally in the arm64 Kconfig. Does selecting only that option
actually pull in new code to the build?

Will

> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index a8f0c74e6f7f..5e8cf90505ec 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -308,6 +308,8 @@ config PCI_SYSCALL
>  
>  source "drivers/pci/Kconfig"
>  
> +source "drivers/rapidio/Kconfig"
> +
>  endmenu
>  
>  menu "Kernel Features"
> -- 
> 2.18.0
>