Re: [PATCH 00/14] mm: convert further simple mmap hooks to mmap_prepare

["Lorenzo Stoakes (ARM)" <ljs@kernel.org>]

On Thu, Nov 05, 2026 at 06:12:09PM -0500, Paul Moore wrote:
> On Thu, Nov 5, 2026 at 4:06 PM Lorenzo Stoakes (ARM) <ljs@kernel.org> wrote:
> >
> > Continue the conversion of users of the deprecated f_op->mmap callback to
> > f_op->mmap_prepare. Keep things gentle this cycle by targeting simple
> > cases.
> >
> > No functional change intended.
> >
> > Build tested on x86-64 (allmodconfig, each patch individually), i386,
> > arm64 and ppc64le.
> >
> > <<>>
> >
> > David, Andrew - I wonder whether one of you guys could take this series
> > through your tree? Since it's kernel-wide it seems sensible to take it
> > through an mm tree.
>
> Granted I've only properly looked at the SELinux patch (7/14), the
> rest I've just skimmed through, but these are all independent patches,
> right?  Is there any reason why individual subsystem maintainers
> shouldn't just pick up their associated patch?  Yes, perhaps chasing
> down individual maintainers is a bit more work, but isn't that the way
> this should work?

I've no objection to people taking patches independently, the concern is people
lagging on that and holding up a key conversion which is entirely mechanical, +
generally tree-wide stuff like this has been via the mm tree.

The mmap_prepare stuff is actually important for security (pertinent given
current AI fix storm) as it's by design super locked down vs. mmap which has
caused several genuine issues including a nasty 0-day.

So am keen to keep that rolling!

In this case each patch is mechanical and simple, so little surface area for
issues.

--
Cheers, Lorenzo