linux-kernel - Re: [PATCH v4] selftests/mm: add process

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Message-ID: <aHDHQzzbtgCh6Ox3@finisterre.sirena.org.uk>
Date: Fri, 11 Jul 2025 09:11:47 +0100
From: Mark Brown <broonie@...nel.org>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: wang lian <lianux.mm@...il.com>, akpm@...ux-foundation.org,
	ziy@...dia.com, david@...hat.com, sj@...nel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-kselftest@...r.kernel.org, shuah@...nel.org,
	Liam.Howlett@...cle.com, brauner@...nel.org, gkwang@...x-info.com,
	jannh@...gle.com, p1ucky0923@...il.com, ryncsn@...il.com,
	vbabka@...e.cz, zijing.zhang@...ton.me
Subject: Re: [PATCH v4] selftests/mm: add process_madvise() tests

On Thu, Jul 10, 2025 at 05:57:23PM +0100, Lorenzo Stoakes wrote:
> On Thu, Jul 10, 2025 at 07:22:49PM +0800, wang lian wrote:

> > +#include <linux/pidfd.h>

> However, the pidfd tests already have a stub in so you can alternatively
> use:

> #include "../pidfd/pidfd.h"

> As is done in guard-regions.c.

One thing to watch out for with peering into the private header files of
other selftests is that it's a routine source of build and sometimes
runtime failures, people have a tendency to update one selftest without
thinking that other selftests might be peering at their code.  The cross
tree aspect can make it painful to deal with the resulting issues.

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