From patchwork Wed Sep 3 17:00:07 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 4835981 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 06FB09F314 for ; Wed, 3 Sep 2014 17:04:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 74F3720222 for ; Wed, 3 Sep 2014 17:04:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D30C520220 for ; Wed, 3 Sep 2014 17:04:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932981AbaICRAx (ORCPT ); Wed, 3 Sep 2014 13:00:53 -0400 Received: from fw-tnat.cambridge.arm.com ([217.140.96.21]:53521 "EHLO cam-smtp0.cambridge.arm.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932515AbaICRAv (ORCPT ); Wed, 3 Sep 2014 13:00:51 -0400 Received: from e103737-lin.cambridge.arm.com (e103737-lin.cambridge.arm.com [10.1.207.142]) by cam-smtp0.cambridge.arm.com (8.13.8/8.13.8) with ESMTP id s83H0SkA032633; Wed, 3 Sep 2014 18:00:28 +0100 From: Sudeep Holla To: LKML Cc: Sudeep Holla , Heiko Carstens , Lorenzo Pieralisi , Greg Kroah-Hartman , Peter Zijlstra , "Rafael J. Wysocki" , Bjorn Helgaas , x86@kernel.org, linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH v4 01/11] cpumask: factor out show_cpumap into separate helper function Date: Wed, 3 Sep 2014 18:00:07 +0100 Message-Id: <1409763617-17074-2-git-send-email-sudeep.holla@arm.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1409763617-17074-1-git-send-email-sudeep.holla@arm.com> References: <1409763617-17074-1-git-send-email-sudeep.holla@arm.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-8.6 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: Sudeep Holla Many sysfs *_show function use cpu{list,mask}_scnprintf to copy cpumap to the buffer aligned to PAGE_SIZE, append '\n' and '\0' to return null terminated buffer with newline. This patch creates a new helper function cpumap_copy_to_buf in cpumask.h and consolidates most of them using this new helper. Signed-off-by: Sudeep Holla Suggested-by: Stephen Boyd Cc: Greg Kroah-Hartman Cc: Peter Zijlstra Cc: "Rafael J. Wysocki" Cc: Bjorn Helgaas Cc: x86@kernel.org Cc: linux-acpi@vger.kernel.org Cc: linux-pci@vger.kernel.org Acked-by: Bjorn Helgaas (drivers/pci part) Acked-by: Rafael J. Wysocki for the ACPI PAD --- arch/x86/kernel/cpu/perf_event_amd_iommu.c | 5 +--- arch/x86/kernel/cpu/perf_event_amd_uncore.c | 6 +---- arch/x86/kernel/cpu/perf_event_intel_rapl.c | 6 +---- arch/x86/kernel/cpu/perf_event_intel_uncore.c | 6 +---- drivers/acpi/acpi_pad.c | 6 +---- drivers/base/cpu.c | 5 +--- drivers/base/node.c | 14 +++------- drivers/base/topology.c | 22 ++------------- drivers/pci/pci-sysfs.c | 39 +++++++-------------------- include/linux/cpumask.h | 27 +++++++++++++++++++ 10 files changed, 49 insertions(+), 87 deletions(-) diff --git a/arch/x86/kernel/cpu/perf_event_amd_iommu.c b/arch/x86/kernel/cpu/perf_event_amd_iommu.c index 639d1289b1ba..61a670de0ef2 100644 --- a/arch/x86/kernel/cpu/perf_event_amd_iommu.c +++ b/arch/x86/kernel/cpu/perf_event_amd_iommu.c @@ -130,10 +130,7 @@ static ssize_t _iommu_cpumask_show(struct device *dev, struct device_attribute *attr, char *buf) { - int n = cpulist_scnprintf(buf, PAGE_SIZE - 2, &iommu_cpumask); - buf[n++] = '\n'; - buf[n] = '\0'; - return n; + return cpumap_copy_to_buf(true, &iommu_cpumask, buf); } static DEVICE_ATTR(cpumask, S_IRUGO, _iommu_cpumask_show, NULL); diff --git a/arch/x86/kernel/cpu/perf_event_amd_uncore.c b/arch/x86/kernel/cpu/perf_event_amd_uncore.c index 30790d798e6b..d96a37ed8570 100644 --- a/arch/x86/kernel/cpu/perf_event_amd_uncore.c +++ b/arch/x86/kernel/cpu/perf_event_amd_uncore.c @@ -219,7 +219,6 @@ static ssize_t amd_uncore_attr_show_cpumask(struct device *dev, struct device_attribute *attr, char *buf) { - int n; cpumask_t *active_mask; struct pmu *pmu = dev_get_drvdata(dev); @@ -230,10 +229,7 @@ static ssize_t amd_uncore_attr_show_cpumask(struct device *dev, else return 0; - n = cpulist_scnprintf(buf, PAGE_SIZE - 2, active_mask); - buf[n++] = '\n'; - buf[n] = '\0'; - return n; + return cpumap_copy_to_buf(true, active_mask, buf); } static DEVICE_ATTR(cpumask, S_IRUGO, amd_uncore_attr_show_cpumask, NULL); diff --git a/arch/x86/kernel/cpu/perf_event_intel_rapl.c b/arch/x86/kernel/cpu/perf_event_intel_rapl.c index 619f7699487a..8a673e138e2e 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_rapl.c +++ b/arch/x86/kernel/cpu/perf_event_intel_rapl.c @@ -365,11 +365,7 @@ static void rapl_pmu_event_read(struct perf_event *event) static ssize_t rapl_get_attr_cpumask(struct device *dev, struct device_attribute *attr, char *buf) { - int n = cpulist_scnprintf(buf, PAGE_SIZE - 2, &rapl_cpu_mask); - - buf[n++] = '\n'; - buf[n] = '\0'; - return n; + return cpumap_copy_to_buf(true, &rapl_cpu_mask, buf); } static DEVICE_ATTR(cpumask, S_IRUGO, rapl_get_attr_cpumask, NULL); diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c index 0939f86f543d..a0b810951743 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c +++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c @@ -3617,11 +3617,7 @@ static int uncore_pmu_event_init(struct perf_event *event) static ssize_t uncore_get_attr_cpumask(struct device *dev, struct device_attribute *attr, char *buf) { - int n = cpulist_scnprintf(buf, PAGE_SIZE - 2, &uncore_cpu_mask); - - buf[n++] = '\n'; - buf[n] = '\0'; - return n; + return cpumap_copy_to_buf(true, &uncore_cpu_mask, buf); } static DEVICE_ATTR(cpumask, S_IRUGO, uncore_get_attr_cpumask, NULL); diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c index f148a0580e04..0dbe52ed6a0d 100644 --- a/drivers/acpi/acpi_pad.c +++ b/drivers/acpi/acpi_pad.c @@ -350,11 +350,7 @@ static ssize_t acpi_pad_idlecpus_store(struct device *dev, static ssize_t acpi_pad_idlecpus_show(struct device *dev, struct device_attribute *attr, char *buf) { - int n = 0; - n = cpumask_scnprintf(buf, PAGE_SIZE-2, to_cpumask(pad_busy_cpus_bits)); - buf[n++] = '\n'; - buf[n] = '\0'; - return n; + return cpumap_copy_to_buf(false, to_cpumask(pad_busy_cpus_bits), buf); } static DEVICE_ATTR(idlecpus, S_IRUGO|S_IWUSR, acpi_pad_idlecpus_show, diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index 006b1bc5297d..277a9cfa9040 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -207,11 +207,8 @@ static ssize_t show_cpus_attr(struct device *dev, char *buf) { struct cpu_attr *ca = container_of(attr, struct cpu_attr, attr); - int n = cpulist_scnprintf(buf, PAGE_SIZE-2, *(ca->map)); - buf[n++] = '\n'; - buf[n] = '\0'; - return n; + return cpumap_copy_to_buf(true, *ca->map, buf); } #define _CPU_ATTR(name, map) \ diff --git a/drivers/base/node.c b/drivers/base/node.c index c6d3ae05f1ca..6e58ad566c13 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -25,32 +25,26 @@ static struct bus_type node_subsys = { }; -static ssize_t node_read_cpumap(struct device *dev, int type, char *buf) +static ssize_t node_read_cpumap(struct device *dev, bool list, char *buf) { struct node *node_dev = to_node(dev); const struct cpumask *mask = cpumask_of_node(node_dev->dev.id); - int len; /* 2008/04/07: buf currently PAGE_SIZE, need 9 chars per 32 bits. */ BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1)); - len = type? - cpulist_scnprintf(buf, PAGE_SIZE-2, mask) : - cpumask_scnprintf(buf, PAGE_SIZE-2, mask); - buf[len++] = '\n'; - buf[len] = '\0'; - return len; + return cpumap_copy_to_buf(list, mask, buf); } static inline ssize_t node_read_cpumask(struct device *dev, struct device_attribute *attr, char *buf) { - return node_read_cpumap(dev, 0, buf); + return node_read_cpumap(dev, false, buf); } static inline ssize_t node_read_cpulist(struct device *dev, struct device_attribute *attr, char *buf) { - return node_read_cpumap(dev, 1, buf); + return node_read_cpumap(dev, true, buf); } static DEVICE_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL); diff --git a/drivers/base/topology.c b/drivers/base/topology.c index be7c1fb7c0c9..39b294bd769b 100644 --- a/drivers/base/topology.c +++ b/drivers/base/topology.c @@ -42,29 +42,11 @@ static ssize_t show_##name(struct device *dev, \ return sprintf(buf, "%d\n", topology_##name(dev->id)); \ } -#if defined(topology_thread_cpumask) || defined(topology_core_cpumask) || \ - defined(topology_book_cpumask) -static ssize_t show_cpumap(int type, const struct cpumask *mask, char *buf) -{ - ptrdiff_t len = PTR_ALIGN(buf + PAGE_SIZE - 1, PAGE_SIZE) - buf; - int n = 0; - - if (len > 1) { - n = type? - cpulist_scnprintf(buf, len-2, mask) : - cpumask_scnprintf(buf, len-2, mask); - buf[n++] = '\n'; - buf[n] = '\0'; - } - return n; -} -#endif - #define define_siblings_show_map(name) \ static ssize_t show_##name(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ - return show_cpumap(0, topology_##name(dev->id), buf); \ + return cpumap_copy_to_buf(false, topology_##name(dev->id), buf);\ } #define define_siblings_show_list(name) \ @@ -72,7 +54,7 @@ static ssize_t show_##name##_list(struct device *dev, \ struct device_attribute *attr, \ char *buf) \ { \ - return show_cpumap(1, topology_##name(dev->id), buf); \ + return cpumap_copy_to_buf(true, topology_##name(dev->id), buf); \ } #define define_siblings_show_func(name) \ diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 9ff0a901ecf7..aa0f1359ef30 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -77,11 +77,10 @@ static ssize_t broken_parity_status_store(struct device *dev, } static DEVICE_ATTR_RW(broken_parity_status); -static ssize_t pci_dev_show_local_cpu(struct device *dev, int type, +static ssize_t pci_dev_show_local_cpu(struct device *dev, bool list, struct device_attribute *attr, char *buf) { const struct cpumask *mask; - int len; #ifdef CONFIG_NUMA mask = (dev_to_node(dev) == -1) ? cpu_online_mask : @@ -89,59 +88,41 @@ static ssize_t pci_dev_show_local_cpu(struct device *dev, int type, #else mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); #endif - len = type ? - cpumask_scnprintf(buf, PAGE_SIZE-2, mask) : - cpulist_scnprintf(buf, PAGE_SIZE-2, mask); - - buf[len++] = '\n'; - buf[len] = '\0'; - return len; + return cpumap_copy_to_buf(list, mask, buf); } static ssize_t local_cpus_show(struct device *dev, struct device_attribute *attr, char *buf) { - return pci_dev_show_local_cpu(dev, 1, attr, buf); + return pci_dev_show_local_cpu(dev, false, attr, buf); } static DEVICE_ATTR_RO(local_cpus); static ssize_t local_cpulist_show(struct device *dev, struct device_attribute *attr, char *buf) { - return pci_dev_show_local_cpu(dev, 0, attr, buf); + return pci_dev_show_local_cpu(dev, true, attr, buf); } static DEVICE_ATTR_RO(local_cpulist); /* * PCI Bus Class Devices */ -static ssize_t pci_bus_show_cpuaffinity(struct device *dev, int type, - struct device_attribute *attr, - char *buf) -{ - int ret; - const struct cpumask *cpumask; - - cpumask = cpumask_of_pcibus(to_pci_bus(dev)); - ret = type ? - cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask) : - cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask); - buf[ret++] = '\n'; - buf[ret] = '\0'; - return ret; -} - static ssize_t cpuaffinity_show(struct device *dev, struct device_attribute *attr, char *buf) { - return pci_bus_show_cpuaffinity(dev, 0, attr, buf); + const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev)); + + return cpumap_copy_to_buf(false, cpumask, buf); } static DEVICE_ATTR_RO(cpuaffinity); static ssize_t cpulistaffinity_show(struct device *dev, struct device_attribute *attr, char *buf) { - return pci_bus_show_cpuaffinity(dev, 1, attr, buf); + const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev)); + + return cpumap_copy_to_buf(true, cpumask, buf); } static DEVICE_ATTR_RO(cpulistaffinity); diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index 2997af6d2ccd..26d8348292dd 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -11,6 +11,8 @@ #include #include +#include + typedef struct cpumask { DECLARE_BITMAP(bits, NR_CPUS); } cpumask_t; /** @@ -792,6 +794,31 @@ static inline const struct cpumask *get_cpu_mask(unsigned int cpu) } #endif /* NR_CPUS > BITS_PER_LONG */ +/** + * cpumap_copy_to_buf - copies the cpumask into the buffer either + * as comma-separated list of cpus or hex values of cpumask + * @list: indicates whether the cpumap must be list + * @mask: the cpumask to copy + * @buf: the buffer to copy into + * + * Returns the length of the (null-terminated) @buf string, zero if + * nothing is copied. + */ +static inline ssize_t +cpumap_copy_to_buf(bool list, const struct cpumask *mask, char *buf) +{ + ptrdiff_t len = PTR_ALIGN(buf + PAGE_SIZE - 1, PAGE_SIZE) - buf - 2; + int n = 0; + + if (len > 1) { + n = list ? cpulist_scnprintf(buf, len, mask) : + cpumask_scnprintf(buf, len, mask); + buf[n++] = '\n'; + buf[n] = '\0'; + } + return n; +} + /* * * From here down, all obsolete. Use cpumask_ variants!