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SubjectRe: [PATCH v2 09/11] powerpc/platforms: Move files from 4xx to 44x
Christophe Leroy <> writes:
> Le 31/03/2020 à 18:04, Arnd Bergmann a écrit :
>> On Tue, Mar 31, 2020 at 5:26 PM Christophe Leroy
>> <> wrote:
>>> Le 31/03/2020 à 17:14, Arnd Bergmann a écrit :
>>>> On Tue, Mar 31, 2020 at 9:49 AM Christophe Leroy
>>>> <> wrote:
>>>>> Only 44x uses 4xx now, so only keep one directory.
>>>>> Signed-off-by: Christophe Leroy <>
>>>>> ---
>>>>> arch/powerpc/platforms/44x/Makefile | 9 +++++++-
>>>>> arch/powerpc/platforms/{4xx => 44x}/cpm.c | 0
>>>> No objections to moving everything into one place, but I wonder if the
>>>> combined name should be 4xx instead of 44x, given that 44x currently
>>>> include 46x and 47x. OTOH your approach has the advantage of
>>>> moving fewer files.
>>> In that case, should we also rename CONFIG_44x to CONFIG_4xx ?
>> That has the risk of breaking user's defconfig files, but given the
>> small number of users, it may be nicer for consistency. In either
>> case, the two symbols should probably hang around as synonyms,
>> the question is just which one is user visible.
> Not sure it is a good idea to keep two synonyms. In the past we made our
> best to remove synonyms (We had CONFIG_8xx and CONFIG_PPC_8xx being
> synonyms, we had CONFIG_6xx and CONFIG_BOOK3S_32 and
> CONFIG_PPC_STD_MMU_32 being synonyms).
> I think it is a lot cleaner when we can avoid synonyms.
> By the way I already dropped CONFIG_4xx in previous patch (8/11). It was
> not many 4xx changed to 44x. It would be a lot more in the other way
> round I'm afraid.
> But I agree with you it might be more natural to change to 4xx.
> Michael, any preference ?

I'd say just use 44x, we've had the inconsistency of 476 living in
platforms/44x, and it hasn't really led to much confusion.

I think for most folks they see 4xx/44x and just think "some 32-bit
embedded thing", so the precise distinction between 4xx, 44x, 476 etc.
is not that important to justify renaming the symbol everywhere I think.


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