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Date: Tue, 4 Nov 2025 15:54:11 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Mike Rapoport <rppt@kernel.org>, llvm@lists.linux.dev,
 oe-kbuild-all@lists.linux.dev, Linux Memory Management List
 <linux-mm@kvack.org>, kernel test robot <lkp@intel.com>
Subject: Re: [linux-next:master 4972/5926]
 kernel/kexec_handover_debug.c:16:18: error: use of undeclared identifier
 'kho_scratch_cnt'
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On Tue, 4 Nov 2025 18:12:24 -0500 Pasha Tatashin <pasha.tatashin@soleen.com> wrote:

> > > -static struct kho_scratch *kho_scratch;
> > > -static unsigned int kho_scratch_cnt;
> > > +struct kho_scratch *kho_scratch;
> > > +unsigned int kho_scratch_cnt;
> >
> > This patch is making changes which are already present.
> >
> > > --- a/kernel/kexec_handover_internal.h
> > > +++ b/kernel/kexec_handover_internal.h
> >
> > Against files which were moved to kernel/liveupdate/!
> >
> > > Andrew, Mike, do you want me to resend the "[PATCH v3 0/3] KHO: kfence
> > > + KHO memory corruption fix" series with the fix included?
> >
> > A little fix against what's presently in mm.git would be great, please.
> 
> Hi Andrew,
> 
> This is because in mm.git you have patches that move kexec_handover*
> to kernel/liveupdate/ (and they fix this build problem), but
> linux-next does not have these patches. The patch I sent is a fixup
> for  "kho: warn and fail on metadata or preserved memory in scratch
> area" patch.

Oh, OK.  Please tell others these things :(

I think I have it all sorted out, thanks.