linux-kernel - Re: [PATCH v6 1/5] cpufreq: powernv: Hot-plug safe the kworker thread

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Message-ID: <20160125054920.GA3183@vireshk>
Date:	Mon, 25 Jan 2016 11:19:20 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Shilpasri G Bhat <shilpa.bhat@...ux.vnet.ibm.com>
Cc:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org,
	rjw@...ysocki.net, linux-pm@...r.kernel.org, pc@...ibm.com,
	anton@...ba.org, ego@...ux.vnet.ibm.com, shreyas@...ux.vnet.ibm.com
Subject: Re: [PATCH v6 1/5] cpufreq: powernv: Hot-plug safe the kworker thread

On 22-01-16, 12:49, Shilpasri G Bhat wrote:
> In the kworker_thread powernv_cpufreq_work_fn(), we can end up
> sending an IPI to a cpu going offline. This is a rare corner case
> which is fixed using {get/put}_online_cpus(). Along with this fix,
> this patch adds changes to do oneshot cpumask_{clear/and} operation.
> 
> Suggested-by: Shreyas B Prabhu <shreyas@...ux.vnet.ibm.com>
> Suggested-by: Gautham R Shenoy <ego@...ux.vnet.ibm.com>
> Signed-off-by: Shilpasri G Bhat <shilpa.bhat@...ux.vnet.ibm.com>
> Reviewed-by: Gautham R. Shenoy <ego@...ux.vnet.ibm.com>
> ---
> Changes form v5:
> - Fix the kbuild-error:
> drivers/cpufreq/powernv-cpufreq.c:428:2: error: implicit declaration of
> function 'get_online_cpus' [-Werror=implicit-function-declaration
> 
>  drivers/cpufreq/powernv-cpufreq.c | 19 +++++++++++--------
>  1 file changed, 11 insertions(+), 8 deletions(-)

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

-- 
viresh