* Re: [PATCH v4 2/2] RISC-V: Implement sparsemem
[not found] ` <alpine.DEB.2.21.9999.1908130921170.30024@viisi.sifive.com>
@ 2019-08-13 16:48 ` Paul Walmsley
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From: Paul Walmsley @ 2019-08-13 16:48 UTC (permalink / raw)
To: Logan Gunthorpe
Cc: Greentime Hu, Rob Herring, Albert Ou, Andrew Waterman,
Palmer Dabbelt, Linux Kernel Mailing List, Stephen Bates,
Olof Johansson, greentime.hu, linux-riscv, Michael Clark,
Christoph Hellwig, linux-mm
On Tue, 13 Aug 2019, Paul Walmsley wrote:
> On Tue, 13 Aug 2019, Logan Gunthorpe wrote:
>
> > On 2019-08-13 12:04 a.m., Greentime Hu wrote:
> >
> > > Every architecture with mmu defines their own pfn_valid().
> >
> > Not true. Arm64, for example just uses the generic implementation in
> > mmzone.h.
>
> arm64 seems to define their own:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/Kconfig#n899
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/mm/init.c#n235
>
> While there are many architectures which have their own pfn_valid();
> oddly, almost none of them set HAVE_ARCH_PFN_VALID ?
(fixed the linux-mm@ address)
- Paul
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2019-08-13 16:48 ` [PATCH v4 2/2] RISC-V: Implement sparsemem Paul Walmsley
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