netdev - Re: [RFC v2 3/5] arm64: socfpga: rename ARCH_STRATIX10 to ARCH

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Date:   Thu, 11 Mar 2021 10:14:49 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Cc:     Tom Rix <trix@...hat.com>, Lee Jones <lee.jones@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Dinh Nguyen <dinguyen@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Moritz Fischer <mdf@...nel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        linux-edac@...r.kernel.org, linux-fpga@...r.kernel.org,
        Networking <netdev@...r.kernel.org>,
        linux-stm32@...md-mailman.stormreply.com, arm-soc <arm@...nel.org>,
        SoC Team <soc@...nel.org>, Olof Johansson <olof@...om.net>
Subject: Re: [RFC v2 3/5] arm64: socfpga: rename ARCH_STRATIX10 to ARCH_SOCFPGA64

On Thu, Mar 11, 2021 at 8:08 AM Krzysztof Kozlowski
<krzysztof.kozlowski@...onical.com> wrote:
> On 10/03/2021 17:42, Arnd Bergmann wrote:
> > On Wed, Mar 10, 2021 at 4:54 PM Krzysztof Kozlowski
> > <krzysztof.kozlowski@...onical.com> wrote:
> >> On 10/03/2021 16:47, Krzysztof Kozlowski wrote:
> >>> This edac Altera driver is very weird... it uses the same compatible
> >>> differently depending whether this is 32-bit or 64-bit (e.g. Stratix
> >>> 10)! On ARMv7 the compatible means for example one IRQ... On ARMv8, we
> >>> have two. It's quite a new code (2019 from Intel), not some ancient
> >>> legacy, so it should never have been accepted...
> >>
> >> Oh, it's not that horrible as it sounds. They actually have different
> >> compatibles for edac driver with these differences (e.g. in interrupts).
> >> They just do not use them and instead check for the basic (common?)
> >> compatible and architecture... Anyway without testing I am not the
> >> person to fix the edac driver.
> >
> > Ok, This should be fixed properly as you describe, but as a quick hack
> > it wouldn't be hard to just change the #ifdef to check for CONFIG_64BIT
> > instead of CONFIG_ARCH_STRATIX10 during the rename of the config
> > symbol.
>
> This would work. The trouble with renaming ARCH_SOCFPGA into
> ARCH_INTEL_SOCFPGA is that still SOCFPGA will appear in many other
> Kconfig symbols or even directory paths.
>
> Let me use ARCH_INTEL_SOCFPGA for 64bit here and renaming of 32bit a
> little bit later.

Maybe you can introduce a hidden 'ARCH_INTEL_SOCFPGA' option first
and select that from both the 32-bit and the 64-bit platforms in the first step.

That should decouple the cleanups, so you can change the drivers to
(only) 'depends on ARCH_INTEL_SOCFPGA' before removing the other
names.

        Arnd