linux-kernel - Re: [PATCH rcu 06/13] torture: Provide EXPERT Kconfig option for arm64 KCSAN torture.sh runs

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Message-ID: <aHEwzENaa9hNGt2k@willie-the-truck>
Date: Fri, 11 Jul 2025 16:42:04 +0100
From: Will Deacon <will@...nel.org>
To: neeraj.upadhyay@...nel.org
Cc: rcu@...r.kernel.org, linux-kernel@...r.kernel.org, paulmck@...nel.org,
	joelagnelf@...dia.com, frederic@...nel.org, boqun.feng@...il.com,
	urezki@...il.com, rostedt@...dmis.org,
	mathieu.desnoyers@...icios.com, jiangshanlai@...il.com,
	qiang.zhang1211@...il.com, neeraj.iitr10@...il.com,
	neeraj.upadhyay@....com, Marco Elver <elver@...gle.com>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	Catalin Marinas <catalin.marinas@....com>,
	kasan-dev@...glegroups.com, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH rcu 06/13] torture: Provide EXPERT Kconfig option for
 arm64 KCSAN torture.sh runs

On Wed, Jul 09, 2025 at 04:14:07PM +0530, neeraj.upadhyay@...nel.org wrote:
> From: "Paul E. McKenney" <paulmck@...nel.org>
> 
> The arm64 architecture requires that KCSAN-enabled kernels be built with
> the CONFIG_EXPERT=y Kconfig option.  This commit therefore causes the
> torture.sh script to provide this option, but only for --kcsan runs on
> arm64 systems.
> 
> Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
> Cc: Marco Elver <elver@...gle.com>
> Cc: Dmitry Vyukov <dvyukov@...gle.com>
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Will Deacon <will@...nel.org>
> Cc: <kasan-dev@...glegroups.com>
> Cc: <linux-arm-kernel@...ts.infradead.org>
> Signed-off-by: Neeraj Upadhyay (AMD) <neeraj.upadhyay@...nel.org>
> ---
>  tools/testing/selftests/rcutorture/bin/torture.sh | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/rcutorture/bin/torture.sh b/tools/testing/selftests/rcutorture/bin/torture.sh
> index 25847042e30e..420c551b824b 100755
> --- a/tools/testing/selftests/rcutorture/bin/torture.sh
> +++ b/tools/testing/selftests/rcutorture/bin/torture.sh
> @@ -313,6 +313,13 @@ then
>  	do_scftorture=no
>  fi
>  
> +# CONFIG_EXPERT=y is currently required for arm64 KCSAN runs.
> +kcsan_expert=
> +if test "${thisarch}" = aarch64
> +then
> +	kcsan_expert="CONFIG_EXPERT=y"
> +fi

Acked-by: Will Deacon <will@...nel.org>

Will