linux-kernel - Re: [PATCH v3 3/4] srcu: Add guards for notrace variants of SRCU-fast readers

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Message-ID: <20250722221625.GA377653@joelbox2>
Date: Tue, 22 Jul 2025 18:16:25 -0400
From: Joel Fernandes <joelagnelf@...dia.com>
To: "Paul E. McKenney" <paulmck@...nel.org>
Cc: rcu@...r.kernel.org, linux-kernel@...r.kernel.org, kernel-team@...a.com,
	rostedt@...dmis.org,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: Re: [PATCH v3 3/4] srcu: Add guards for notrace variants of
 SRCU-fast readers

On Mon, Jul 21, 2025 at 09:24:32AM -0700, Paul E. McKenney wrote:
> This adds the usual scoped_guard(srcu_fast_notrace, &my_srcu) and
> guard(srcu_fast_notrace)(&my_srcu).
> 
> Signed-off-by: Paul E. McKenney <paulmck@...nel.org>

Reviewed-by: Joel Fernandes <joelagnelf@...dia.com>

thanks,

 - Joel

> Cc: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
> Cc: Steven Rostedt <rostedt@...dmis.org>
> Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
> ---
>  include/linux/srcu.h | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/include/linux/srcu.h b/include/linux/srcu.h
> index 7a692bf8f99b9..ada65b58bc4c5 100644
> --- a/include/linux/srcu.h
> +++ b/include/linux/srcu.h
> @@ -515,4 +515,9 @@ DEFINE_LOCK_GUARD_1(srcu_fast, struct srcu_struct,
>  		    srcu_read_unlock_fast(_T->lock, _T->scp),
>  		    struct srcu_ctr __percpu *scp)
>  
> +DEFINE_LOCK_GUARD_1(srcu_fast_notrace, struct srcu_struct,
> +		    _T->scp = srcu_read_lock_fast_notrace(_T->lock),
> +		    srcu_read_unlock_fast_notrace(_T->lock, _T->scp),
> +		    struct srcu_ctr __percpu *scp)
> +
>  #endif
> -- 
> 2.40.1
>