linux-kernel - Re: [PATCH 3/4] PM / OPP: take RCU lock in dev_pm_opp_get_opp

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

Message-ID: <CAKohpo=ocsVseYj0Ee5rYqMgTDnd9jkvzCFJmaTUFrbiLH1_vw@mail.gmail.com>
Date:	Thu, 18 Dec 2014 07:41:14 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Paul McKenney <paulmck@...ux.vnet.ibm.com>
Cc:	Dmitry Torokhov <dtor@...omium.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Stefan Wahren <stefan.wahren@...e.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Nishanth Menon <nm@...com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/4] PM / OPP: take RCU lock in dev_pm_opp_get_opp_count

On 18 December 2014 at 05:17, Paul E. McKenney
<paulmck@...ux.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 :)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/