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Date: Fri, 30 Oct 2015 11:48:37 -0400
From: Prarit Bhargava <prarit@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: trenn@...e.de, Prarit Bhargava <prarit@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Len Brown <len.brown@...el.com>,
Borislav Petkov <bp@...en8.de>,
Andy Lutomirski <luto@...capital.net>,
Zhu Guihua <zhugh.fnst@...fujitsu.com>,
Denys Vlasenko <dvlasenk@...hat.com>,
Jan H. Schönherr <jschoenh@...zon.de>,
Boris Ostrovsky <boris.ostrovsky@...cle.com>,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: [PATCH 1/3] drivers/base, Combine topology.c and cpu.c
The topology.c file contains sysfs files that describe a cpu's location
and its siblings. This patch combines topology.c into cpu.c to make the
next set of changes easier to understand.
There are no functional changes with this patch.
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: x86@...nel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Len Brown <len.brown@...el.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Zhu Guihua <zhugh.fnst@...fujitsu.com>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: "Jan H. Schönherr" <jschoenh@...zon.de>
Cc: Boris Ostrovsky <boris.ostrovsky@...cle.com>
Cc: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Signed-off-by: Prarit Bhargava <prarit@...hat.com>
---
drivers/base/Makefile | 2 +-
drivers/base/cpu.c | 127 ++++++++++++++++++++++++++++++++++++++
drivers/base/topology.c | 155 -----------------------------------------------
3 files changed, 128 insertions(+), 156 deletions(-)
delete mode 100644 drivers/base/topology.c
diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index 6b2a84e..567ab7c 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -4,7 +4,7 @@ obj-y := component.o core.o bus.o dd.o syscore.o \
driver.o class.o platform.o \
cpu.o firmware.o init.o map.o devres.o \
attribute_container.o transport_class.o \
- topology.o container.o property.o cacheinfo.o
+ container.o property.o cacheinfo.o
obj-$(CONFIG_DEVTMPFS) += devtmpfs.o
obj-$(CONFIG_DMA_CMA) += dma-contiguous.o
obj-y += power/
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 91bbb19..b939c98 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -17,6 +17,8 @@
#include <linux/of.h>
#include <linux/cpufeature.h>
#include <linux/tick.h>
+#include <linux/mm.h>
+#include <linux/hardirq.h>
#include "base.h"
@@ -175,11 +177,136 @@ static struct attribute *crash_note_cpu_attrs[] = {
NULL
};
+#define define_id_show_func(name) \
+static ssize_t name##_show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ return sprintf(buf, "%d\n", topology_##name(dev->id)); \
+}
+
+#define define_siblings_show_map(name, mask) \
+static ssize_t name##_show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ return cpumap_print_to_pagebuf(false, buf, topology_##mask(dev->id));\
+}
+
+#define define_siblings_show_list(name, mask) \
+static ssize_t name##_list_show(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return cpumap_print_to_pagebuf(true, buf, topology_##mask(dev->id));\
+}
+
+#define define_siblings_show_func(name, mask) \
+ define_siblings_show_map(name, mask); \
+ define_siblings_show_list(name, mask)
+
+define_id_show_func(physical_package_id);
+static DEVICE_ATTR_RO(physical_package_id);
+
+define_id_show_func(core_id);
+static DEVICE_ATTR_RO(core_id);
+
+define_siblings_show_func(thread_siblings, sibling_cpumask);
+static DEVICE_ATTR_RO(thread_siblings);
+static DEVICE_ATTR_RO(thread_siblings_list);
+
+define_siblings_show_func(core_siblings, core_cpumask);
+static DEVICE_ATTR_RO(core_siblings);
+static DEVICE_ATTR_RO(core_siblings_list);
+
+#ifdef CONFIG_SCHED_BOOK
+define_id_show_func(book_id);
+static DEVICE_ATTR_RO(book_id);
+define_siblings_show_func(book_siblings, book_cpumask);
+static DEVICE_ATTR_RO(book_siblings);
+static DEVICE_ATTR_RO(book_siblings_list);
+#endif
+
+static struct attribute *topology_attrs[] = {
+ &dev_attr_physical_package_id.attr,
+ &dev_attr_core_id.attr,
+ &dev_attr_thread_siblings.attr,
+ &dev_attr_thread_siblings_list.attr,
+ &dev_attr_core_siblings.attr,
+ &dev_attr_core_siblings_list.attr,
+#ifdef CONFIG_SCHED_BOOK
+ &dev_attr_book_id.attr,
+ &dev_attr_book_siblings.attr,
+ &dev_attr_book_siblings_list.attr,
+#endif
+ NULL
+};
+
static struct attribute_group crash_note_cpu_attr_group = {
.attrs = crash_note_cpu_attrs,
};
#endif
+static struct attribute_group topology_attr_group = {
+ .attrs = topology_attrs,
+ .name = "topology"
+};
+
+/* Add/Remove cpu_topology interface for CPU device */
+static int topology_add_dev(unsigned int cpu)
+{
+ struct device *dev = get_cpu_device(cpu);
+
+ return sysfs_create_group(&dev->kobj, &topology_attr_group);
+}
+
+static void topology_remove_dev(unsigned int cpu)
+{
+ struct device *dev = get_cpu_device(cpu);
+
+ sysfs_remove_group(&dev->kobj, &topology_attr_group);
+}
+
+static int topology_cpu_callback(struct notifier_block *nfb,
+ unsigned long action, void *hcpu)
+{
+ unsigned int cpu = (unsigned long)hcpu;
+ int rc = 0;
+
+ switch (action) {
+ case CPU_UP_PREPARE:
+ case CPU_UP_PREPARE_FROZEN:
+ rc = topology_add_dev(cpu);
+ break;
+ case CPU_UP_CANCELED:
+ case CPU_UP_CANCELED_FROZEN:
+ case CPU_DEAD:
+ case CPU_DEAD_FROZEN:
+ topology_remove_dev(cpu);
+ break;
+ }
+ return notifier_from_errno(rc);
+}
+
+static int topology_sysfs_init(void)
+{
+ int cpu;
+ int rc = 0;
+
+ cpu_notifier_register_begin();
+
+ for_each_online_cpu(cpu) {
+ rc = topology_add_dev(cpu);
+ if (rc)
+ goto out;
+ }
+ __hotcpu_notifier(topology_cpu_callback, 0);
+
+out:
+ cpu_notifier_register_done();
+ return rc;
+}
+
+device_initcall(topology_sysfs_init);
+
static const struct attribute_group *common_cpu_attr_groups[] = {
#ifdef CONFIG_KEXEC
&crash_note_cpu_attr_group,
diff --git a/drivers/base/topology.c b/drivers/base/topology.c
deleted file mode 100644
index 8b7d7f8..0000000
--- a/drivers/base/topology.c
+++ /dev/null
@@ -1,155 +0,0 @@
-/*
- * driver/base/topology.c - Populate sysfs with cpu topology information
- *
- * Written by: Zhang Yanmin, Intel Corporation
- *
- * Copyright (C) 2006, Intel Corp.
- *
- * All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT. See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-#include <linux/mm.h>
-#include <linux/cpu.h>
-#include <linux/module.h>
-#include <linux/hardirq.h>
-#include <linux/topology.h>
-
-#define define_id_show_func(name) \
-static ssize_t name##_show(struct device *dev, \
- struct device_attribute *attr, char *buf) \
-{ \
- return sprintf(buf, "%d\n", topology_##name(dev->id)); \
-}
-
-#define define_siblings_show_map(name, mask) \
-static ssize_t name##_show(struct device *dev, \
- struct device_attribute *attr, char *buf) \
-{ \
- return cpumap_print_to_pagebuf(false, buf, topology_##mask(dev->id));\
-}
-
-#define define_siblings_show_list(name, mask) \
-static ssize_t name##_list_show(struct device *dev, \
- struct device_attribute *attr, \
- char *buf) \
-{ \
- return cpumap_print_to_pagebuf(true, buf, topology_##mask(dev->id));\
-}
-
-#define define_siblings_show_func(name, mask) \
- define_siblings_show_map(name, mask); \
- define_siblings_show_list(name, mask)
-
-define_id_show_func(physical_package_id);
-static DEVICE_ATTR_RO(physical_package_id);
-
-define_id_show_func(core_id);
-static DEVICE_ATTR_RO(core_id);
-
-define_siblings_show_func(thread_siblings, sibling_cpumask);
-static DEVICE_ATTR_RO(thread_siblings);
-static DEVICE_ATTR_RO(thread_siblings_list);
-
-define_siblings_show_func(core_siblings, core_cpumask);
-static DEVICE_ATTR_RO(core_siblings);
-static DEVICE_ATTR_RO(core_siblings_list);
-
-#ifdef CONFIG_SCHED_BOOK
-define_id_show_func(book_id);
-static DEVICE_ATTR_RO(book_id);
-define_siblings_show_func(book_siblings, book_cpumask);
-static DEVICE_ATTR_RO(book_siblings);
-static DEVICE_ATTR_RO(book_siblings_list);
-#endif
-
-static struct attribute *default_attrs[] = {
- &dev_attr_physical_package_id.attr,
- &dev_attr_core_id.attr,
- &dev_attr_thread_siblings.attr,
- &dev_attr_thread_siblings_list.attr,
- &dev_attr_core_siblings.attr,
- &dev_attr_core_siblings_list.attr,
-#ifdef CONFIG_SCHED_BOOK
- &dev_attr_book_id.attr,
- &dev_attr_book_siblings.attr,
- &dev_attr_book_siblings_list.attr,
-#endif
- NULL
-};
-
-static struct attribute_group topology_attr_group = {
- .attrs = default_attrs,
- .name = "topology"
-};
-
-/* Add/Remove cpu_topology interface for CPU device */
-static int topology_add_dev(unsigned int cpu)
-{
- struct device *dev = get_cpu_device(cpu);
-
- return sysfs_create_group(&dev->kobj, &topology_attr_group);
-}
-
-static void topology_remove_dev(unsigned int cpu)
-{
- struct device *dev = get_cpu_device(cpu);
-
- sysfs_remove_group(&dev->kobj, &topology_attr_group);
-}
-
-static int topology_cpu_callback(struct notifier_block *nfb,
- unsigned long action, void *hcpu)
-{
- unsigned int cpu = (unsigned long)hcpu;
- int rc = 0;
-
- switch (action) {
- case CPU_UP_PREPARE:
- case CPU_UP_PREPARE_FROZEN:
- rc = topology_add_dev(cpu);
- break;
- case CPU_UP_CANCELED:
- case CPU_UP_CANCELED_FROZEN:
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- topology_remove_dev(cpu);
- break;
- }
- return notifier_from_errno(rc);
-}
-
-static int topology_sysfs_init(void)
-{
- int cpu;
- int rc = 0;
-
- cpu_notifier_register_begin();
-
- for_each_online_cpu(cpu) {
- rc = topology_add_dev(cpu);
- if (rc)
- goto out;
- }
- __hotcpu_notifier(topology_cpu_callback, 0);
-
-out:
- cpu_notifier_register_done();
- return rc;
-}
-
-device_initcall(topology_sysfs_init);
--
1.7.9.3
--
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