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From: Greg Kroah-Hartman on 2 Mar 2010 19:00
From: Andi Kleen <andi(a)firstfloor.org>

Use sysdev_class attribute arrays in node driver

Convert the node driver to sysdev_class attribute arrays. This
greatly cleans up the code and remove a lot of code.

Signed-off-by: Andi Kleen <ak(a)linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de>
---
drivers/base/cpu.c | 57 +++++++++++++++------------------------------------
1 files changed, 17 insertions(+), 40 deletions(-)

diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index b04ecfc..fb456b7 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -13,8 +13,11 @@

#include "base.h"

+static struct sysdev_class_attribute *cpu_sysdev_class_attrs[];
+
struct sysdev_class cpu_sysdev_class = {
.name = "cpu",
+ .attrs = cpu_sysdev_class_attrs,
};
EXPORT_SYMBOL(cpu_sysdev_class);

@@ -90,20 +93,6 @@ static ssize_t cpu_release_store(struct class *class, const char *buf,

static CLASS_ATTR(probe, S_IWUSR, NULL, cpu_probe_store);
static CLASS_ATTR(release, S_IWUSR, NULL, cpu_release_store);
-
-int __init cpu_probe_release_init(void)
-{
- int rc;
-
- rc = sysfs_create_file(&cpu_sysdev_class.kset.kobj,
- &class_attr_probe.attr);
- if (!rc)
- rc = sysfs_create_file(&cpu_sysdev_class.kset.kobj,
- &class_attr_release.attr);
-
- return rc;
-}
-device_initcall(cpu_probe_release_init);
#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */

#else /* ... !CONFIG_HOTPLUG_CPU */
@@ -162,6 +151,7 @@ static ssize_t show_cpus_attr(struct sysdev_class *class,
#define _CPU_ATTR(name, map) \
{ _SYSDEV_CLASS_ATTR(name, 0444, show_cpus_attr, NULL), map }

+/* Keep in sync with cpu_sysdev_class_attrs */
static struct cpu_attr cpu_attrs[] = {
_CPU_ATTR(online, &cpu_online_mask),
_CPU_ATTR(possible, &cpu_possible_mask),
@@ -212,29 +202,6 @@ static ssize_t print_cpus_offline(struct sysdev_class *class,
}
static SYSDEV_CLASS_ATTR(offline, 0444, print_cpus_offline, NULL);

-static struct sysdev_class_attribute *cpu_state_attr[] = {
- &cpu_attrs[0].attr,
- &cpu_attrs[1].attr,
- &cpu_attrs[2].attr,
- &attr_kernel_max,
- &attr_offline,
-};
-
-static int cpu_states_init(void)
-{
- int i;
- int err = 0;
-
- for (i = 0; i < ARRAY_SIZE(cpu_state_attr); i++) {
- int ret;
- ret = sysdev_class_create_file(&cpu_sysdev_class,
- cpu_state_attr[i]);
- if (!err)
- err = ret;
- }
- return err;
-}
-
/*
* register_cpu - Setup a sysfs device for a CPU.
* @cpu - cpu->hotpluggable field set to 1 will generate a control file in
@@ -280,9 +247,6 @@ int __init cpu_dev_init(void)
int err;

err = sysdev_class_register(&cpu_sysdev_class);
- if (!err)
- err = cpu_states_init();
-
#if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
if (!err)
err = sched_create_sysfs_power_savings_entries(&cpu_sysdev_class);
@@ -290,3 +254,16 @@ int __init cpu_dev_init(void)

return err;
}
+
+static struct sysdev_class_attribute *cpu_sysdev_class_attrs[] = {
+#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
+ &class_attr_probe.attr,
+ &class_attr_release.attr,
+#endif
+ &cpu_attrs[0].attr,
+ &cpu_attrs[1].attr,
+ &cpu_attrs[2].attr,
+ &attr_kernel_max,
+ &attr_offline,
+ NULL
+};
--
1.7.0.1

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