From patchwork Thu Jan 23 13:37:09 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. Wysocki" X-Patchwork-Id: 3528871 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id E4A41C02DD for ; Thu, 23 Jan 2014 13:28:47 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E21602015D for ; Thu, 23 Jan 2014 13:28:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D56212018B for ; Thu, 23 Jan 2014 13:28:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754385AbaAWN2Z (ORCPT ); Thu, 23 Jan 2014 08:28:25 -0500 Received: from v094114.home.net.pl ([79.96.170.134]:49526 "HELO v094114.home.net.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1754043AbaAWN1Y (ORCPT ); Thu, 23 Jan 2014 08:27:24 -0500 Received: from aeqt45.neoplus.adsl.tpnet.pl [79.191.175.45] (HELO vostro.rjw.lan) by serwer1319399.home.pl [79.96.170.134] with SMTP (IdeaSmtpServer v0.80) id 5bca541f45fed9ad; Thu, 23 Jan 2014 14:27:22 +0100 From: "Rafael J. Wysocki" To: Linux PM list Cc: ACPI Devel Maling List , LKML , Mika Westerberg Subject: [RFC/RFT][PATCH v2 2/6] PM / QoS: Add no_constraints_value field to struct pm_qos_constraints Date: Thu, 23 Jan 2014 14:37:09 +0100 Message-ID: <2339791.y1kU1czjQd@vostro.rjw.lan> User-Agent: KMail/4.11.4 (Linux/3.13.0-rc8+; KDE/4.11.4; x86_64; ; ) In-Reply-To: <1447517.8AFrWcAgld@vostro.rjw.lan> References: <5434847.aCyiWHNRe7@vostro.rjw.lan> <1447517.8AFrWcAgld@vostro.rjw.lan> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-7.5 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: Rafael J. Wysocki Add a new field, no_constraints_value, to struct pm_qos_constraints representing a list of PM QoS constraint requests to be returned by pm_qos_get_value() when that list of requests is empty. That field will be equal to default_value for all of the existing global PM QoS classes and for the resume latency device PM QoS type, but it will be different from default_value for the new latency tolerance device PM QoS type introduced by the next changeset. Signed-off-by: Rafael J. Wysocki --- drivers/base/power/qos.c | 1 + include/linux/pm_qos.h | 1 + kernel/power/qos.c | 5 ++++- 3 files changed, 6 insertions(+), 1 deletion(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Index: linux-pm/drivers/base/power/qos.c =================================================================== --- linux-pm.orig/drivers/base/power/qos.c +++ linux-pm/drivers/base/power/qos.c @@ -190,6 +190,7 @@ static int dev_pm_qos_constraints_alloca plist_head_init(&c->list); c->target_value = PM_QOS_RESUME_LATENCY_DEFAULT_VALUE; c->default_value = PM_QOS_RESUME_LATENCY_DEFAULT_VALUE; + c->no_constraint_value = PM_QOS_RESUME_LATENCY_DEFAULT_VALUE; c->type = PM_QOS_MIN; c->notifiers = n; Index: linux-pm/include/linux/pm_qos.h =================================================================== --- linux-pm.orig/include/linux/pm_qos.h +++ linux-pm/include/linux/pm_qos.h @@ -77,6 +77,7 @@ struct pm_qos_constraints { struct plist_head list; s32 target_value; /* Do not change to 64 bit */ s32 default_value; + s32 no_constraint_value; enum pm_qos_type type; struct blocking_notifier_head *notifiers; }; Index: linux-pm/kernel/power/qos.c =================================================================== --- linux-pm.orig/kernel/power/qos.c +++ linux-pm/kernel/power/qos.c @@ -66,6 +66,7 @@ static struct pm_qos_constraints cpu_dma .list = PLIST_HEAD_INIT(cpu_dma_constraints.list), .target_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE, .default_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE, + .no_constraint_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE, .type = PM_QOS_MIN, .notifiers = &cpu_dma_lat_notifier, }; @@ -79,6 +80,7 @@ static struct pm_qos_constraints network .list = PLIST_HEAD_INIT(network_lat_constraints.list), .target_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE, .default_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE, + .no_constraint_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE, .type = PM_QOS_MIN, .notifiers = &network_lat_notifier, }; @@ -93,6 +95,7 @@ static struct pm_qos_constraints network .list = PLIST_HEAD_INIT(network_tput_constraints.list), .target_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE, .default_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE, + .no_constraint_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE, .type = PM_QOS_MAX, .notifiers = &network_throughput_notifier, }; @@ -128,7 +131,7 @@ static const struct file_operations pm_q static inline int pm_qos_get_value(struct pm_qos_constraints *c) { if (plist_head_empty(&c->list)) - return c->default_value; + return c->no_constraint_value; switch (c->type) { case PM_QOS_MIN: