Re: [PATCH v2 0/6] mm: Optimize mseal checks

[Pedro Falcato <pedro.falcato@gmail.com>]

On Fri, Aug 9, 2024 at 12:12 AM Andrew Morton <akpm@linux-foundation.org> wrote:
>
> On Wed,  7 Aug 2024 22:13:03 +0100 Pedro Falcato <pedro.falcato@gmail.com> wrote:
>
> > This series also depends on (and will eventually very slightly conflict with)
> > the powerpc series that removes arch_unmap[2].
>
> That's awkward.  Please describe the dependency?

One of the transformations done in this patch series (patch 2) assumes
that arch_unmap either doesn't exist or does nothing.
PPC is the only architecture with an arch_unmap implementation, and
through the series I linked they're going to make it work via
->close().

What's the easiest way to deal with this? Can the PPC series go
through the mm tree?

I could also possibly work around this on my end, and either limit the
terribleness to the ppc arch_unmap code or limit the effectiveness of
the patch set a bit. But both of these options feel like somewhat
fighting the inevitable.

What do you think?

Thanks,
Pedro