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Date: Tue, 9 Apr 2024 08:54:51 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Geert Uytterhoeven <geert@...ux-m68k.org>, Ian Rogers <irogers@...gle.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Adrian Hunter <adrian.hunter@...el.com>, Peter Zijlstra <peterz@...radead.org>, 
	Ingo Molnar <mingo@...nel.org>, LKML <linux-kernel@...r.kernel.org>, 
	linux-perf-users@...r.kernel.org
Subject: Re: [PATCHSET 0/9] Sync tools headers with the kernel source

Hello,

On Tue, Apr 9, 2024 at 6:47 AM Arnaldo Carvalho de Melo <acme@...nel.org> wrote:
>
> On Tue, Apr 09, 2024 at 09:15:02AM +0200, Geert Uytterhoeven wrote:
> > Hi Namhyung, Arnaldo,
> >
> > On Mon, Apr 8, 2024 at 8:55 PM Namhyung Kim <namhyung@...nel.org> wrote:
> > > I'm gonna carry these changes on the perf tools tree.  I'll update the
> > > vhost.h once it lands on the mainline.
> > >
> > > This is the full explanation from Arnaldo:
> > >
> > > There used to be no copies, with tools/ code using kernel headers
> > > directly. From time to time tools/perf/ broke due to legitimate kernel
> > > hacking. At some point Linus complained about such direct usage. Then we
> > > adopted the current model.
> >
> > Do you have a reference to that?
>
> I would have to do a search on the mailing list to find the exact
> exchange, this is from memory and from people asking this repeatedly.
>
> Ingo replied with reasons similar to the ones I use in this canned
> explanation when sending the notice of updating the files.

This is the Ingo's reply:

https://lore.kernel.org/r/ZhTwPLliHXKPAJUQ@gmail.com/

Thanks,
Namhyung

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