From patchwork Tue Apr 12 18:06:25 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Akshay Adiga X-Patchwork-Id: 8813621 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id E020A9FBEA for ; Tue, 12 Apr 2016 18:07:57 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 102A620361 for ; Tue, 12 Apr 2016 18:07:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A2C492013A for ; Tue, 12 Apr 2016 18:07:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964907AbcDLSHx (ORCPT ); Tue, 12 Apr 2016 14:07:53 -0400 Received: from e28smtp04.in.ibm.com ([125.16.236.4]:55122 "EHLO e28smtp04.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965625AbcDLSHx (ORCPT ); Tue, 12 Apr 2016 14:07:53 -0400 Received: from localhost by e28smtp04.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 12 Apr 2016 23:37:49 +0530 Received: from d28relay05.in.ibm.com (9.184.220.62) by e28smtp04.in.ibm.com (192.168.1.134) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Tue, 12 Apr 2016 23:37:47 +0530 X-IBM-Helo: d28relay05.in.ibm.com X-IBM-MailFrom: akshay.adiga@linux.vnet.ibm.com X-IBM-RcptTo: linux-pm@vger.kernel.org Received: from d28av04.in.ibm.com (d28av04.in.ibm.com [9.184.220.66]) by d28relay05.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u3CI85XD12386690 for ; Tue, 12 Apr 2016 23:38:05 +0530 Received: from d28av04.in.ibm.com (localhost [127.0.0.1]) by d28av04.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u3CI7f6O025896 for ; Tue, 12 Apr 2016 23:37:44 +0530 Received: from localhost.in.ibm.com ([9.77.193.4]) by d28av04.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u3CI7cgN025676; Tue, 12 Apr 2016 23:37:40 +0530 From: Akshay Adiga To: rjw@rjwysocki.net, viresh.kumar@linaro.org, linux-pm@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Cc: ego@linux.vnet.ibm.com, Shilpasri G Bhat , Akshay Adiga Subject: [PATCH 1/2] cpufreq: powernv: Remove flag use-case of policy->driver_data Date: Tue, 12 Apr 2016 23:36:25 +0530 Message-Id: <1460484386-28389-2-git-send-email-akshay.adiga@linux.vnet.ibm.com> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1460484386-28389-1-git-send-email-akshay.adiga@linux.vnet.ibm.com> References: <1460484386-28389-1-git-send-email-akshay.adiga@linux.vnet.ibm.com> X-TM-AS-MML: disable x-cbid: 16041218-0013-0000-0000-00000BAB492C Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Shilpasri G Bhat 'commit 1b0289848d5d ("cpufreq: powernv: Add sysfs attributes to show throttle stats")' used policy->driver_data as a flag for one-time creation of throttle sysfs files. Instead of this use 'kernfs_find_and_get()' to check if the attribute already exists. This is required as policy->driver_data is used for other purposes in the later patch. Signed-off-by: Shilpasri G Bhat Signed-off-by: Akshay Adiga Reviewed-by: Shreyas B. Prabhu --- drivers/cpufreq/powernv-cpufreq.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/drivers/cpufreq/powernv-cpufreq.c b/drivers/cpufreq/powernv-cpufreq.c index 39ac78c..e2e2219 100644 --- a/drivers/cpufreq/powernv-cpufreq.c +++ b/drivers/cpufreq/powernv-cpufreq.c @@ -455,13 +455,15 @@ static int powernv_cpufreq_target_index(struct cpufreq_policy *policy, static int powernv_cpufreq_cpu_init(struct cpufreq_policy *policy) { int base, i; + struct kernfs_node *kn; base = cpu_first_thread_sibling(policy->cpu); for (i = 0; i < threads_per_core; i++) cpumask_set_cpu(base + i, policy->cpus); - if (!policy->driver_data) { + kn = kernfs_find_and_get(policy->kobj.sd, throttle_attr_grp.name); + if (!kn) { int ret; ret = sysfs_create_group(&policy->kobj, &throttle_attr_grp); @@ -470,11 +472,8 @@ static int powernv_cpufreq_cpu_init(struct cpufreq_policy *policy) policy->cpu); return ret; } - /* - * policy->driver_data is used as a flag for one-time - * creation of throttle sysfs files. - */ - policy->driver_data = policy; + } else { + kernfs_put(kn); } return cpufreq_table_validate_and_show(policy, powernv_freqs); }