linux-kernel - Re: [RFC][PATCH v2 07/31] timers: PM: Use del_timer

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Date:   Fri, 28 Oct 2022 19:45:07 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Stephen Boyd <sboyd@...nel.org>,
        Guenter Roeck <linux@...ck-us.net>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-pm@...r.kernel.org
Subject: Re: [RFC][PATCH v2 07/31] timers: PM: Use del_timer_shutdown()

On Thu, Oct 27, 2022 at 5:09 PM Steven Rostedt <rostedt@...dmis.org> wrote:
>
> From: "Steven Rostedt (Google)" <rostedt@...dmis.org>
>
> Instead of open coding making the timer look like it was not registered by
> setting the function pointer to NULL, call del_timer_shutdown() that does
> the same thing.
>
> Link: https://lore.kernel.org/all/20220407161745.7d6754b3@gandalf.local.home/
>
> Cc: "Rafael J. Wysocki" <rafael@...nel.org>
> Cc: Len Brown <len.brown@...el.com>
> Cc: Pavel Machek <pavel@....cz>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: linux-pm@...r.kernel.org
> Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>

Please add "wakeup:" to the subject after "PM:".

Apart from this

Acked-by: Rafael J. Wysocki <rafael@...nel.org>

> ---
>  drivers/base/power/wakeup.c | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)
>
> diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
> index 7cc0c0cf8eaa..c690f6c0d670 100644
> --- a/drivers/base/power/wakeup.c
> +++ b/drivers/base/power/wakeup.c
> @@ -202,12 +202,7 @@ void wakeup_source_remove(struct wakeup_source *ws)
>         raw_spin_unlock_irqrestore(&events_lock, flags);
>         synchronize_srcu(&wakeup_srcu);
>
> -       del_timer_sync(&ws->timer);
> -       /*
> -        * Clear timer.function to make wakeup_source_not_registered() treat
> -        * this wakeup source as not registered.
> -        */
> -       ws->timer.function = NULL;
> +       del_timer_shutdown(&ws->timer);
>  }
>  EXPORT_SYMBOL_GPL(wakeup_source_remove);
>
> --
> 2.35.1