linux-kernel - Re: [PATCH 2/2] cpuidle: Remove unnecessary current_clr_polling() on poll

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <ZV5sEwwnQTjh-QXm@localhost.localdomain>
Date:   Wed, 22 Nov 2023 22:01:07 +0100
From:   Frederic Weisbecker <frederic@...nel.org>
To:     "Rafael J . Wysocki" <rafael@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH 2/2] cpuidle: Remove unnecessary current_clr_polling() on
 poll_idle()

Le Mon, Nov 13, 2023 at 05:03:26PM -0500, Frederic Weisbecker a écrit :
> There is no point in clearing TIF_NR_POLLING and folding TIF_NEED_RESCHED
> upon poll_idle() exit because cpuidle_idle_call() is going to set again
> TIF_NR_POLLING anyway. Also if TIF_NEED_RESCHED is set, it will be
> folded and TIF_NR_POLLING will be cleared at the end of do_idle().
> 
> Acked-by: Rafael J. Wysocki <rafael@...nel.org>
> Signed-off-by: Frederic Weisbecker <frederic@...nel.org>

Please discard this one, I'm taking a new way to deal with that.

Thanks.

> ---
>  drivers/cpuidle/poll_state.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/cpuidle/poll_state.c b/drivers/cpuidle/poll_state.c
> index 9b6d90a72601..d5cb3eb85a54 100644
> --- a/drivers/cpuidle/poll_state.c
> +++ b/drivers/cpuidle/poll_state.c
> @@ -40,8 +40,6 @@ static int __cpuidle poll_idle(struct cpuidle_device *dev,
>  	}
>  	raw_local_irq_disable();
>  
> -	current_clr_polling();
> -
>  	return index;
>  }
>  
> -- 
> 2.42.1
>