Re: [PATCH V6 00/26] mm/mmap: Drop __SXXX/__PXXX macros from across platforms
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- To: Arnd Bergmann <arnd@xxxxxxxx>, Christophe Leroy <christophe.leroy@xxxxxxxxxx>
- Subject: Re: [PATCH V6 00/26] mm/mmap: Drop __SXXX/__PXXX macros from across platforms
- From: Anshuman Khandual <anshuman.khandual@xxxxxxx>
- Date: Wed, 6 Jul 2022 14:03:05 +0530
- Cc: "linux-mm@xxxxxxxxx" <linux-mm@xxxxxxxxx>, "akpm@xxxxxxxxxxxxxxxxxxxx" <akpm@xxxxxxxxxxxxxxxxxxxx>, "linux-xtensa@xxxxxxxxxxxxxxxx" <linux-xtensa@xxxxxxxxxxxxxxxx>, "linux-ia64@xxxxxxxxxxxxxxx" <linux-ia64@xxxxxxxxxxxxxxx>, "linux-parisc@xxxxxxxxxxxxxxx" <linux-parisc@xxxxxxxxxxxxxxx>, "linux-s390@xxxxxxxxxxxxxxx" <linux-s390@xxxxxxxxxxxxxxx>, "linux-sh@xxxxxxxxxxxxxxx" <linux-sh@xxxxxxxxxxxxxxx>, "linux-hexagon@xxxxxxxxxxxxxxx" <linux-hexagon@xxxxxxxxxxxxxxx>, "x86@xxxxxxxxxx" <x86@xxxxxxxxxx>, "linux-um@xxxxxxxxxxxxxxxxxxx" <linux-um@xxxxxxxxxxxxxxxxxxx>, "linux-mips@xxxxxxxxxxxxxxx" <linux-mips@xxxxxxxxxxxxxxx>, "linux-csky@xxxxxxxxxxxxxxx" <linux-csky@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "hch@xxxxxxxxxxxxx" <hch@xxxxxxxxxxxxx>, "linux-m68k@xxxxxxxxxxxxxxxxxxxx" <linux-m68k@xxxxxxxxxxxxxxx>, "openrisc@xxxxxxxxxxxxxxxxxxxx" <openrisc@xxxxxxxxxxxxxxxxxxxx>, "linux-alpha@xxxxxxxxxxxxxxx" <linux-alpha@xxxxxxxxxxxxxxx>, "sparclinux@xxxxxxxxxxxxxxx" <sparclinux@xxxxxxxxxxxxxxx>, "linux-riscv@xxxxxxxxxxxxxxxxxxx" <linux-riscv@xxxxxxxxxxxxxxxxxxx>, "linux-snps-arc@xxxxxxxxxxxxxxxxxxx" <linux-snps-arc@xxxxxxxxxxxxxxxxxxx>, "linuxppc-dev@xxxxxxxxxxxxxxxx" <linuxppc-dev@xxxxxxxxxxxxxxxx>, "linux-arm-kernel@xxxxxxxxxxxxxxxxxxx" <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>
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- References: <20220630051630.1718927-1-anshuman.khandual@arm.com> <8a6ccbae-7d7c-6e08-cc28-eeb649f86112@arm.com> <85fff3f6-373f-3e6a-325e-0fa8ad46273a@csgroup.eu> <CAK8P3a1gb1Xrg4AGnncFpN=aDxVKfjkt1TmSvZXXADZTv7eE-g@mail.gmail.com>
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On 7/6/22 12:34, Arnd Bergmann wrote:
> On Wed, Jul 6, 2022 at 8:33 AM Christophe Leroy
> <christophe.leroy@xxxxxxxxxx> wrote:
>
>> As far as I can see in Kconfig, CONFIG_MMU is user selectable on the
>> following architectures:
>> - ARM
>> - M68K
>> - RISCV
>> - SH
>>
>> And is disabled by default on XTENSA.
>
> Right, the list is complete, though it's also default-enabled for
> every CPU core on xtensa, and you can only disable it for
> "custom" CPU cores.
ARM, M68K, RISCV all have got them inside wrapper or files which are
not built, without CONFIG_MMU. With build fixes for SH and XTENSA on
linux-next, I guess we are good.
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