From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751854Ab3FZKyX (ORCPT ); Wed, 26 Jun 2013 06:54:23 -0400 Received: from mailout1.samsung.com ([203.254.224.24]:30898 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750843Ab3FZKyV (ORCPT ); Wed, 26 Jun 2013 06:54:21 -0400 X-AuditID: cbfee61a-b7f3b6d000006edd-4b-51cac85b08a3 Date: Wed, 26 Jun 2013 12:54:11 +0200 From: Lukasz Majewski To: Viresh Kumar Cc: "Rafael J. Wysocky" , "cpufreq@vger.kernel.org" , Linux PM list , Vincent Guittot , Jonghwa Lee , Myungjoo Ham , linux-kernel , Lukasz Majewski , Andre Przywara , Daniel Lezcano , Kukjin Kim , Zhang Rui , Eduardo Valentin , t.figa@samsung.com Subject: Re: [PATCH v4 1/7] cpufreq: Store cpufreq policies in a list Message-id: <20130626125411.5dc935bf@amdc308.digital.local> In-reply-to: References: <1370502472-7249-1-git-send-email-l.majewski@samsung.com> <1371661969-7660-1-git-send-email-l.majewski@samsung.com> <1371661969-7660-2-git-send-email-l.majewski@samsung.com> Organization: SPRC Poland X-Mailer: Claws Mail 3.8.1 (GTK+ 2.24.10; x86_64-pc-linux-gnu) MIME-version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprKIsWRmVeSWpSXmKPExsVy+t9jQd2YE6cCDZZMZrb483Y5q8XTph/s FvM+y1qs2f+TyaLz7BNmi94FV9ks3jzitri8aw6bxefeI4wWtxtXsFn0L+xlsnjysI/NYv2M 1ywWHUe+MVts/OrhwO+xeM9LJo871/aweayb9pbZo2/LKkaPR4tbGD2O39jO5PF5k1wAexSX TUpqTmZZapG+XQJXxp2W/ywFM0QrZjf7NDAeF+hi5OSQEDCRWLfyOAuELSZx4d56ti5GLg4h gemMEo8efmSBcNqZJH62TWPtYuTgYBFQlbh6VBOkgU1AT+Lz3adMIGERAS2JlzdTQcqZBU6z SOx4cI0dJC4s4Cpx/bwiSDmvgLXEzcZeVhCbUyBY4umW3VC7Wpgkdry5BpbgF5CUaP/3gxni IDuJc582sEM0C0r8mHwP7FBmoF2btzWxQtjyEpvXvGWewCg4C0nZLCRls5CULWBkXsUomlqQ XFCclJ5rqFecmFtcmpeul5yfu4kRHFnPpHYwrmywOMQowMGoxMOrsPVkoBBrYllxZe4hRgkO ZiUR3jfzTwUK8aYkVlalFuXHF5XmpBYfYpTmYFES5z3Qah0oJJCeWJKanZpakFoEk2Xi4JRq YFzcMG9Hy/0zurJnlbc3PNXcKTc3bPsSR64fzP90v2heaWJcELVD4bB1hObUWj/ja5vf+Rzu 371j1QWOI3H7Mm7wvBC7GZjen5G0++nZ1vO9RxbUGfVZKTuskPeRKz+aWLIzb9/h6u+GIZv6 Zsq7lBWYrpdvtF05d+0NhYMfAliXPbt8X29n2wwlluKMREMt5qLiRACt4OWmqAIAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 26 Jun 2013 16:05:12,Viresh Kumar wrote: > On 19 June 2013 22:42, Lukasz Majewski wrote: > > Policies available in a cpufreq framework are now linked together. > > They are accessible via cpufreq_policy_list defined at cpufreq core. > > > > Signed-off-by: Lukasz Majewski > > Signed-off-by: Myungjoo Ham > > > > Changes for v4: > > - New patch > > You need to write changelog after ---, so that it doesn't get > commited. > > > --- So here <---> I will put change log for v5. > > drivers/cpufreq/cpufreq.c | 3 +++ > > include/linux/cpufreq.h | 1 + > > 2 files changed, 4 insertions(+) > > > > diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c > > index 2ce86ed..665e641 100644 > > --- a/drivers/cpufreq/cpufreq.c > > +++ b/drivers/cpufreq/cpufreq.c > > @@ -46,6 +46,7 @@ static DEFINE_PER_CPU(struct cpufreq_policy *, > > cpufreq_cpu_data); static DEFINE_PER_CPU(char[CPUFREQ_NAME_LEN], > > cpufreq_cpu_governor); #endif > > static DEFINE_RWLOCK(cpufreq_driver_lock); > > +static LIST_HEAD(cpufreq_policy_list); > > > > /* > > * cpu_policy_rwsem is a per CPU reader-writer semaphore designed > > to cure @@ -989,6 +990,7 @@ static int cpufreq_add_dev(struct > > device *dev, struct subsys_interface *sif) } > > #endif > > > > + list_add(&policy->policy_list, &cpufreq_policy_list); > > ret = cpufreq_add_dev_interface(cpu, policy, dev); > > if (ret) I will add list_del(&cpufreq_policy_list); here. > > goto err_out_unregister; > > what about handling error cases? Thanks for spotting. > > > @@ -1992,6 +1994,7 @@ int cpufreq_unregister_driver(struct > > cpufreq_driver *driver) > > subsys_interface_unregister(&cpufreq_interface); > > unregister_hotcpu_notifier(&cpufreq_cpu_notifier); > > > > + list_del(&cpufreq_policy_list); > > write_lock_irqsave(&cpufreq_driver_lock, flags); > > cpufreq_driver = NULL; > > write_unlock_irqrestore(&cpufreq_driver_lock, flags); > > diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h > > index ab1932c..5348981 100644 > > --- a/include/linux/cpufreq.h > > +++ b/include/linux/cpufreq.h > > @@ -117,6 +117,7 @@ struct cpufreq_policy { > > > > struct cpufreq_real_policy user_policy; > > > > + struct list_head policy_list; > > struct kobject kobj; > > struct completion kobj_unregister; > > -- > viresh -- Best regards, Lukasz Majewski Samsung R&D Institute Poland (SRPOL) | Linux Platform Group