linux-kernel - Re: [PATCH Resend] cpufreq: Set cpufreq_cpu

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Date:	Mon, 2 Feb 2015 09:29:54 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	ethan zhao <ethan.zhao@...cle.com>
Cc:	Rafael Wysocki <rjw@...ysocki.net>,
	santosh shilimkar <santosh.shilimkar@...cle.com>,
	Linaro Kernel Mailman List <linaro-kernel@...ts.linaro.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH Resend] cpufreq: Set cpufreq_cpu_data to NULL before
 putting kobject

On 2 February 2015 at 09:26, ethan zhao <ethan.zhao@...cle.com> wrote:
>  How to prevent the policy to be freed between
>
> cpufreq_cpu_get()  and cpufreq_cpu_put() ?

kobject_get() increases the reference count of a policy and the policy
will only be freed when this is zero. And it will only be zero once all
cpufreq_cpu_get() are matched with corresponding cpufreq_cpu_put().

> You are maxing up the water with sand ?

:)
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