From patchwork Fri Sep 14 09:25:34 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Lezcano X-Patchwork-Id: 1456411 Return-Path: X-Original-To: patchwork-linux-acpi@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 9A1ED40220 for ; Fri, 14 Sep 2012 09:25:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758490Ab2INJZn (ORCPT ); Fri, 14 Sep 2012 05:25:43 -0400 Received: from mail-wg0-f44.google.com ([74.125.82.44]:60906 "EHLO mail-wg0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758336Ab2INJZm (ORCPT ); Fri, 14 Sep 2012 05:25:42 -0400 Received: by wgbdr13 with SMTP id dr13so3363220wgb.1 for ; Fri, 14 Sep 2012 02:25:40 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:x-gm-message-state; bh=PfqZFDkk8ZFT8pfD1mpsvayrre/bUtM+zfM9rgsqSx0=; b=Gt+YWKAPvOLrg4qauUFI5ECtv+3Yt/S3U2TJchJXek8+CLSBjROu9TGZOQTPlC5zoz nKU0Zs0Fn/yc5/8BPJoWnohEPRBG9yh4wY+nGEep3GOT5RndSdCRH75amao51G8v7Ypt iuuGInKXG8miZKzskX3S0AGNOtLNQ2Kc7RY2xxbrBPZTBrLcQN6xN+/nAEtINmGQ4xR9 9TQdC9UVM8U9ID0idGk9AHoBhaYehKuVJMA3jeIuaadNuM6qieo+MQrI3ZXsL6lkFSEJ HWzhLUeT7Ga0lldOPW6+OWMpbxRIVwY6oF/tqk3sMFRNCG7SMUk4gIN1XJjnIB6IEB+6 VGaw== Received: by 10.180.20.204 with SMTP id p12mr4674096wie.7.1347614740600; Fri, 14 Sep 2012 02:25:40 -0700 (PDT) Received: from localhost.localdomain (AToulouse-651-1-110-236.w109-222.abo.wanadoo.fr. [109.222.197.236]) by mx.google.com with ESMTPS id ct3sm17996030wib.5.2012.09.14.02.25.38 (version=TLSv1/SSLv3 cipher=OTHER); Fri, 14 Sep 2012 02:25:39 -0700 (PDT) From: Daniel Lezcano To: rjw@sisk.pl, lenb@kernel.org Cc: linux-pm@vger.kernel.org, linux-acpi@vger.kernel.org, patches@linaro.org, linaro-dev@lists.linaro.org Subject: [PATCH 1/3] acpi : move cpuidle_device field out of the acpi_processor_power structure Date: Fri, 14 Sep 2012 11:25:34 +0200 Message-Id: <1347614736-9553-1-git-send-email-daniel.lezcano@linaro.org> X-Mailer: git-send-email 1.7.5.4 X-Gm-Message-State: ALoCoQlQsjSdgmqfaSqIZuFT9ISH/pt0R8ZA66AT4C/JCsvQC6WhRv+Mtoti8dCWZssw8a2//Xvy Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Currently we have the cpuidle_device field in the acpi_processor_power structure. This adds a dependency between processor.h and cpuidle.h Although it is not a real problem, removing this dependency has the benefit of separating a bit more the cpuidle code from the rest of the acpi code. Also, the compilation should be a bit improved because we do no longer include cpuidle.h in processor.h. The preprocessor was generating 30418 loc and with this patch it generates 30256 loc for processor_thermal.c, a file which is not concerned at all by cpuidle, like processor_perflib.c and processor_throttling.c. That may sound ridiculous, but "small streams make big rivers" :P This patch moves this field into a static global per cpu variable like what is done in the intel_idle driver. Signed-off-by: Daniel Lezcano --- drivers/acpi/processor_idle.c | 32 ++++++++++++++++++++++++-------- include/acpi/processor.h | 2 -- 2 files changed, 24 insertions(+), 10 deletions(-) diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index de89624..0a6405d 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -79,6 +79,8 @@ module_param(bm_check_disable, uint, 0000); static unsigned int latency_factor __read_mostly = 2; module_param(latency_factor, uint, 0644); +static DEFINE_PER_CPU(struct cpuidle_device *, acpi_cpuidle_device); + static int disabled_by_idle_boot_param(void) { return boot_option_idle_override == IDLE_POLL || @@ -998,7 +1000,7 @@ static int acpi_processor_setup_cpuidle_cx(struct acpi_processor *pr) int i, count = CPUIDLE_DRIVER_STATE_START; struct acpi_processor_cx *cx; struct cpuidle_state_usage *state_usage; - struct cpuidle_device *dev = &pr->power.dev; + struct cpuidle_device *dev = per_cpu(acpi_cpuidle_device, pr->id); if (!pr->flags.power_setup_done) return -EINVAL; @@ -1130,6 +1132,7 @@ static int acpi_processor_setup_cpuidle_states(struct acpi_processor *pr) int acpi_processor_hotplug(struct acpi_processor *pr) { int ret = 0; + struct cpuidle_device *dev = per_cpu(acpi_cpuidle_device, pr->id); if (disabled_by_idle_boot_param()) return 0; @@ -1145,11 +1148,11 @@ int acpi_processor_hotplug(struct acpi_processor *pr) return -ENODEV; cpuidle_pause_and_lock(); - cpuidle_disable_device(&pr->power.dev); + cpuidle_disable_device(dev); acpi_processor_get_power_info(pr); if (pr->flags.power) { acpi_processor_setup_cpuidle_cx(pr); - ret = cpuidle_enable_device(&pr->power.dev); + ret = cpuidle_enable_device(dev); } cpuidle_resume_and_unlock(); @@ -1160,6 +1163,7 @@ int acpi_processor_cst_has_changed(struct acpi_processor *pr) { int cpu; struct acpi_processor *_pr; + struct cpuidle_device *dev; if (disabled_by_idle_boot_param()) return 0; @@ -1190,7 +1194,8 @@ int acpi_processor_cst_has_changed(struct acpi_processor *pr) _pr = per_cpu(processors, cpu); if (!_pr || !_pr->flags.power_setup_done) continue; - cpuidle_disable_device(&_pr->power.dev); + dev = per_cpu(acpi_cpuidle_device, cpu); + cpuidle_disable_device(dev); } /* Populate Updated C-state information */ @@ -1204,7 +1209,8 @@ int acpi_processor_cst_has_changed(struct acpi_processor *pr) acpi_processor_get_power_info(_pr); if (_pr->flags.power) { acpi_processor_setup_cpuidle_cx(_pr); - cpuidle_enable_device(&_pr->power.dev); + dev = per_cpu(acpi_cpuidle_device, cpu); + cpuidle_enable_device(dev); } } put_online_cpus(); @@ -1221,6 +1227,7 @@ int __cpuinit acpi_processor_power_init(struct acpi_processor *pr, { acpi_status status = 0; int retval; + struct cpuidle_device *dev; static int first_run; if (disabled_by_idle_boot_param()) @@ -1266,11 +1273,18 @@ int __cpuinit acpi_processor_power_init(struct acpi_processor *pr, printk(KERN_DEBUG "ACPI: %s registered with cpuidle\n", acpi_idle_driver.name); } + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) + return -ENOMEM; + per_cpu(acpi_cpuidle_device, pr->id) = dev; + + acpi_processor_setup_cpuidle_cx(pr); + /* Register per-cpu cpuidle_device. Cpuidle driver * must already be registered before registering device */ - acpi_processor_setup_cpuidle_cx(pr); - retval = cpuidle_register_device(&pr->power.dev); + retval = cpuidle_register_device(dev); if (retval) { if (acpi_processor_registered == 0) cpuidle_unregister_driver(&acpi_idle_driver); @@ -1284,11 +1298,13 @@ int __cpuinit acpi_processor_power_init(struct acpi_processor *pr, int acpi_processor_power_exit(struct acpi_processor *pr, struct acpi_device *device) { + struct cpuidle_device *dev = per_cpu(acpi_cpuidle_device, pr->id); + if (disabled_by_idle_boot_param()) return 0; if (pr->flags.power) { - cpuidle_unregister_device(&pr->power.dev); + cpuidle_unregister_device(dev); acpi_processor_registered--; if (acpi_processor_registered == 0) cpuidle_unregister_driver(&acpi_idle_driver); diff --git a/include/acpi/processor.h b/include/acpi/processor.h index db427fa..ddd1a44 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -3,7 +3,6 @@ #include #include -#include #include #include @@ -64,7 +63,6 @@ struct acpi_processor_cx { }; struct acpi_processor_power { - struct cpuidle_device dev; struct acpi_processor_cx *state; unsigned long bm_check_timestamp; u32 default_state;