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[209.132.180.67]) by mx.google.com with ESMTP id dl1si29047854pbb.67.2015.01.01.23.05.41; Thu, 01 Jan 2015 23:05:43 -0800 (PST) Received-SPF: none (google.com: linux-pm-owner@vger.kernel.org does not designate permitted sender hosts) client-ip=209.132.180.67; Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750762AbbABHFk (ORCPT + 12 others); Fri, 2 Jan 2015 02:05:40 -0500 Received: from mail-pd0-f172.google.com ([209.85.192.172]:56294 "EHLO mail-pd0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750744AbbABHFk (ORCPT ); Fri, 2 Jan 2015 02:05:40 -0500 Received: by mail-pd0-f172.google.com with SMTP id y13so23389956pdi.3 for ; Thu, 01 Jan 2015 23:05:40 -0800 (PST) X-Received: by 10.66.157.40 with SMTP id wj8mr122411321pab.105.1420182340048; Thu, 01 Jan 2015 23:05:40 -0800 (PST) Received: from localhost ([122.167.116.151]) by mx.google.com with ESMTPSA id fp13sm43692933pdb.30.2015.01.01.23.05.38 (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Thu, 01 Jan 2015 23:05:39 -0800 (PST) From: Viresh Kumar To: Rafael Wysocki Cc: linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org, prarit@redhat.com, skannan@codeaurora.org, Viresh Kumar Subject: [PATCH 12/17] cpufreq: use light-weight cpufreq_cpu_get_raw() in __cpufreq_add_dev Date: Fri, 2 Jan 2015 12:34:33 +0530 Message-Id: <0c3bdb11bedca250f4d60db7a1e1983e0f3d9072.1420181916.git.viresh.kumar@linaro.org> X-Mailer: git-send-email 2.2.0 In-Reply-To: References: In-Reply-To: References: Sender: linux-pm-owner@vger.kernel.org Precedence: list List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: viresh.kumar@linaro.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.217.170 as permitted sender) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , We just need to check if a 'policy' is already present for the cpu we are adding. We don't need to take all the locks and do kobject usage updates. Use the light-weight cpufreq_cpu_get_raw() routine instead. Signed-off-by: Viresh Kumar --- drivers/cpufreq/cpufreq.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 3061a5823e3c..788016cded33 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1109,11 +1109,9 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif) /* check whether a different CPU already registered this * CPU because it is in the same boat. */ - policy = cpufreq_cpu_get(cpu); - if (unlikely(policy)) { - cpufreq_cpu_put(policy); + policy = cpufreq_cpu_get_raw(cpu); + if (unlikely(policy)) return 0; - } if (!down_read_trylock(&cpufreq_rwsem)) return 0;