1 files changed, 79 insertions, 71 deletions

diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 3991502b21e5..9a5578efbc93 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -1,8 +1,7 @@
 /*
- * drivers/base/cpu.c - basic CPU class support
+ * CPU subsystem support
  */
 
-#include <linux/sysdev.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/sched.h>
@@ -14,40 +13,40 @@
 
 #include "base.h"
 
-static struct sysdev_class_attribute *cpu_sysdev_class_attrs[];
-
-struct sysdev_class cpu_sysdev_class = {
+struct bus_type cpu_subsys = {
         .name = "cpu",
-        .attrs = cpu_sysdev_class_attrs,
+        .dev_name = "cpu",
 };
-EXPORT_SYMBOL(cpu_sysdev_class);
+EXPORT_SYMBOL_GPL(cpu_subsys);
 
-static DEFINE_PER_CPU(struct sys_device *, cpu_sys_devices);
+static DEFINE_PER_CPU(struct device *, cpu_sys_devices);
 
 #ifdef CONFIG_HOTPLUG_CPU
-static ssize_t show_online(struct sys_device *dev, struct sysdev_attribute *attr,
+static ssize_t show_online(struct device *dev,
+                           struct device_attribute *attr,
                            char *buf)
 {
-        struct cpu *cpu = container_of(dev, struct cpu, sysdev);
+        struct cpu *cpu = container_of(dev, struct cpu, dev);
 
-        return sprintf(buf, "%u\n", !!cpu_online(cpu->sysdev.id));
+        return sprintf(buf, "%u\n", !!cpu_online(cpu->dev.id));
 }
 
-static ssize_t __ref store_online(struct sys_device *dev, struct sysdev_attribute *attr,
-                                 const char *buf, size_t count)
+static ssize_t __ref store_online(struct device *dev,
+                                  struct device_attribute *attr,
+                                  const char *buf, size_t count)
 {
-        struct cpu *cpu = container_of(dev, struct cpu, sysdev);
+        struct cpu *cpu = container_of(dev, struct cpu, dev);
         ssize_t ret;
 
         cpu_hotplug_driver_lock();
         switch (buf[0]) {
         case '0':
-                ret = cpu_down(cpu->sysdev.id);
+                ret = cpu_down(cpu->dev.id);
                 if (!ret)
                         kobject_uevent(&dev->kobj, KOBJ_OFFLINE);
                 break;
         case '1':
-                ret = cpu_up(cpu->sysdev.id);
+                ret = cpu_up(cpu->dev.id);
                 if (!ret)
                         kobject_uevent(&dev->kobj, KOBJ_ONLINE);
                 break;
@@ -60,44 +59,44 @@ static ssize_t __ref store_online(struct sys_device *dev, struct sysdev_attribut
                 ret = count;
         return ret;
 }
-static SYSDEV_ATTR(online, 0644, show_online, store_online);
+static DEVICE_ATTR(online, 0644, show_online, store_online);
 
 static void __cpuinit register_cpu_control(struct cpu *cpu)
 {
-        sysdev_create_file(&cpu->sysdev, &attr_online);
+        device_create_file(&cpu->dev, &dev_attr_online);
 }
 void unregister_cpu(struct cpu *cpu)
 {
-        int logical_cpu = cpu->sysdev.id;
+        int logical_cpu = cpu->dev.id;
 
         unregister_cpu_under_node(logical_cpu, cpu_to_node(logical_cpu));
 
-        sysdev_remove_file(&cpu->sysdev, &attr_online);
+        device_remove_file(&cpu->dev, &dev_attr_online);
 
-        sysdev_unregister(&cpu->sysdev);
+        device_unregister(&cpu->dev);
         per_cpu(cpu_sys_devices, logical_cpu) = NULL;
         return;
 }
 
 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
-static ssize_t cpu_probe_store(struct sysdev_class *class,
-                               struct sysdev_class_attribute *attr,
+static ssize_t cpu_probe_store(struct device *dev,
+                               struct device_attribute *attr,
                                const char *buf,
                                size_t count)
 {
         return arch_cpu_probe(buf, count);
 }
 
-static ssize_t cpu_release_store(struct sysdev_class *class,
-                                 struct sysdev_class_attribute *attr,
+static ssize_t cpu_release_store(struct device *dev,
+                                 struct device_attribute *attr,
                                  const char *buf,
                                  size_t count)
 {
         return arch_cpu_release(buf, count);
 }
 
-static SYSDEV_CLASS_ATTR(probe, S_IWUSR, NULL, cpu_probe_store);
-static SYSDEV_CLASS_ATTR(release, S_IWUSR, NULL, cpu_release_store);
+static DEVICE_ATTR(probe, S_IWUSR, NULL, cpu_probe_store);
+static DEVICE_ATTR(release, S_IWUSR, NULL, cpu_release_store);
 #endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
 
 #else /* ... !CONFIG_HOTPLUG_CPU */
@@ -109,15 +108,15 @@ static inline void register_cpu_control(struct cpu *cpu)
 #ifdef CONFIG_KEXEC
 #include <linux/kexec.h>
 
-static ssize_t show_crash_notes(struct sys_device *dev, struct sysdev_attribute *attr,
+static ssize_t show_crash_notes(struct device *dev, struct device_attribute *attr,
                                 char *buf)
 {
-        struct cpu *cpu = container_of(dev, struct cpu, sysdev);
+        struct cpu *cpu = container_of(dev, struct cpu, dev);
         ssize_t rc;
         unsigned long long addr;
         int cpunum;
 
-        cpunum = cpu->sysdev.id;
+        cpunum = cpu->dev.id;
 
         /*
          * Might be reading other cpu's data based on which cpu read thread
@@ -129,7 +128,7 @@ static ssize_t show_crash_notes(struct sys_device *dev, struct sysdev_attribute
         rc = sprintf(buf, "%Lx\n", addr);
         return rc;
 }
-static SYSDEV_ATTR(crash_notes, 0400, show_crash_notes, NULL);
+static DEVICE_ATTR(crash_notes, 0400, show_crash_notes, NULL);
 #endif
 
 /*
@@ -137,12 +136,12 @@ static SYSDEV_ATTR(crash_notes, 0400, show_crash_notes, NULL);
  */
 
 struct cpu_attr {
-        struct sysdev_class_attribute attr;
+        struct device_attribute attr;
         const struct cpumask *const * const map;
 };
 
-static ssize_t show_cpus_attr(struct sysdev_class *class,
-                              struct sysdev_class_attribute *attr,
+static ssize_t show_cpus_attr(struct device *dev,
+                              struct device_attribute *attr,
                               char *buf)
 {
         struct cpu_attr *ca = container_of(attr, struct cpu_attr, attr);
@@ -153,10 +152,10 @@ static ssize_t show_cpus_attr(struct sysdev_class *class,
         return n;
 }
 
-#define _CPU_ATTR(name, map)                                            \
-        { _SYSDEV_CLASS_ATTR(name, 0444, show_cpus_attr, NULL), map }
+#define _CPU_ATTR(name, map) \
+        { __ATTR(name, 0444, show_cpus_attr, NULL), map }
 
-/* Keep in sync with cpu_sysdev_class_attrs */
+/* Keep in sync with cpu_subsys_attrs */
 static struct cpu_attr cpu_attrs[] = {
         _CPU_ATTR(online, &cpu_online_mask),
         _CPU_ATTR(possible, &cpu_possible_mask),
@@ -166,19 +165,19 @@ static struct cpu_attr cpu_attrs[] = {
 /*
  * Print values for NR_CPUS and offlined cpus
  */
-static ssize_t print_cpus_kernel_max(struct sysdev_class *class,
-                                     struct sysdev_class_attribute *attr, char *buf)
+static ssize_t print_cpus_kernel_max(struct device *dev,
+                                     struct device_attribute *attr, char *buf)
 {
         int n = snprintf(buf, PAGE_SIZE-2, "%d\n", NR_CPUS - 1);
         return n;
 }
-static SYSDEV_CLASS_ATTR(kernel_max, 0444, print_cpus_kernel_max, NULL);
+static DEVICE_ATTR(kernel_max, 0444, print_cpus_kernel_max, NULL);
 
 /* arch-optional setting to enable display of offline cpus >= nr_cpu_ids */
 unsigned int total_cpus;
 
-static ssize_t print_cpus_offline(struct sysdev_class *class,
-                                  struct sysdev_class_attribute *attr, char *buf)
+static ssize_t print_cpus_offline(struct device *dev,
+                                  struct device_attribute *attr, char *buf)
 {
         int n = 0, len = PAGE_SIZE-2;
         cpumask_var_t offline;
@@ -205,7 +204,7 @@ static ssize_t print_cpus_offline(struct sysdev_class *class,
         n += snprintf(&buf[n], len - n, "\n");
         return n;
 }
-static SYSDEV_CLASS_ATTR(offline, 0444, print_cpus_offline, NULL);
+static DEVICE_ATTR(offline, 0444, print_cpus_offline, NULL);
 
 /*
  * register_cpu - Setup a sysfs device for a CPU.
@@ -218,39 +217,60 @@ static SYSDEV_CLASS_ATTR(offline, 0444, print_cpus_offline, NULL);
 int __cpuinit register_cpu(struct cpu *cpu, int num)
 {
         int error;
-        cpu->node_id = cpu_to_node(num);
-        cpu->sysdev.id = num;
-        cpu->sysdev.cls = &cpu_sysdev_class;
-
-        error = sysdev_register(&cpu->sysdev);
 
+        cpu->node_id = cpu_to_node(num);
+        cpu->dev.id = num;
+        cpu->dev.bus = &cpu_subsys;
+        error = device_register(&cpu->dev);
         if (!error && cpu->hotpluggable)
                 register_cpu_control(cpu);
         if (!error)
-                per_cpu(cpu_sys_devices, num) = &cpu->sysdev;
+                per_cpu(cpu_sys_devices, num) = &cpu->dev;
         if (!error)
                 register_cpu_under_node(num, cpu_to_node(num));
 
 #ifdef CONFIG_KEXEC
         if (!error)
-                error = sysdev_create_file(&cpu->sysdev, &attr_crash_notes);
+                error = device_create_file(&cpu->dev, &dev_attr_crash_notes);
 #endif
         return error;
 }
 
-struct sys_device *get_cpu_sysdev(unsigned cpu)
+struct device *get_cpu_device(unsigned cpu)
 {
         if (cpu < nr_cpu_ids && cpu_possible(cpu))
                 return per_cpu(cpu_sys_devices, cpu);
         else
                 return NULL;
 }
-EXPORT_SYMBOL_GPL(get_cpu_sysdev);
+EXPORT_SYMBOL_GPL(get_cpu_device);
+
+static struct attribute *cpu_root_attrs[] = {
+#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
+        &dev_attr_probe.attr,
+        &dev_attr_release.attr,
+#endif
+        &cpu_attrs[0].attr.attr,
+        &cpu_attrs[1].attr.attr,
+        &cpu_attrs[2].attr.attr,
+        &dev_attr_kernel_max.attr,
+        &dev_attr_offline.attr,
+        NULL
+};
+
+static struct attribute_group cpu_root_attr_group = {
+        .attrs = cpu_root_attrs,
+};
+
+static const struct attribute_group *cpu_root_attr_groups[] = {
+        &cpu_root_attr_group,
+        NULL,
+};
 
 bool cpu_is_hotpluggable(unsigned cpu)
 {
-        struct sys_device *dev = get_cpu_sysdev(cpu);
-        return dev && container_of(dev, struct cpu, sysdev)->hotpluggable;
+        struct device *dev = get_cpu_device(cpu);
+        return dev && container_of(dev, struct cpu, dev)->hotpluggable;
 }
 EXPORT_SYMBOL_GPL(cpu_is_hotpluggable);
 
@@ -258,24 +278,12 @@ int __init cpu_dev_init(void)
 {
         int err;
 
-        err = sysdev_class_register(&cpu_sysdev_class);
+        err = subsys_system_register(&cpu_subsys, cpu_root_attr_groups);
+        if (err)
+                return err;
+
 #if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
-        if (!err)
-                err = sched_create_sysfs_power_savings_entries(&cpu_sysdev_class);
+        err = sched_create_sysfs_power_savings_entries(cpu_subsys.dev_root);
 #endif
-
         return err;
 }
-
-static struct sysdev_class_attribute *cpu_sysdev_class_attrs[] = {
-#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
-        &attr_probe,
-        &attr_release,
-#endif
-        &cpu_attrs[0].attr,
-        &cpu_attrs[1].attr,
-        &cpu_attrs[2].attr,
-        &attr_kernel_max,
-        &attr_offline,
-        NULL
-};