Re: linux-next: build failure after merge of the xen-tip tree

[Jürgen Groß]

On 04.08.26 20:00, Val Packett wrote:
> El 4 de agosto de 2026 1:28:36 p. m. ART, Mark Brown <broonie@xxxxxxxxxx> escribió:
> > Hi all,
> >
> > After merging the xen-tip tree, today's linux-next build (x86_64
> > allmodconfig) failed like this:
> >
> > ERROR: modpost: "init_mm" [drivers/xen/xen-privcmd.ko] undefined!
> >
> > Caused by commit
> >
> >   64d26fb2ad1f2 (xen: privcmd: fix ioeventfd crash under PV domain)
> >
> > I have used the tree from next-20260803 instead.
>
> Sorry for the trouble! Did not expect that to get applied so quickly.. I had noticed recently in my own testing that that patch wasn't actually ready to go in due to the symbol visibility issue, right. I'll work on resolving it.
> ~val

I'm pretty sure mm maintainers wouldn't like init_mm to be exported to
modules.

I'd go for a special variant of xen_remap_domain_mfn_array() mapping just
a single pfn into init_mm. This could be implemented in mmu_pv.c avoiding
the need to export init_mm.


Juergen

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