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Date: Thu, 18 Dec 2014 07:41:14 +0530
Message-ID: <CAKohpo=ocsVseYj0Ee5rYqMgTDnd9jkvzCFJmaTUFrbiLH1_vw@mail.gmail.com>
Subject: Re: [PATCH 3/4] PM / OPP: take RCU lock in dev_pm_opp_get_opp_count
From: Viresh Kumar <viresh.kumar@linaro.org>
To: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Dmitry Torokhov <dtor@chromium.org>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Stefan Wahren <stefan.wahren@i2se.com>,
        Paul Gortmaker <paul.gortmaker@windriver.com>,
        Nishanth Menon <nm@ti.com>,
        "linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On 18 December 2014 at 05:17, Paul E. McKenney
<paulmck@linux.vnet.ibm.com> wrote:
> Yep, they can be nested.  Both rcu_read_lock() and rcu_read_unlock()
> are quite fast, as are their friends, so there is almost no performance
> penalty from nesting.  So the decision normally turns on maintainability
> and style.

Thanks again for your kind advice :)
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