---

yaml
---
r: 11775
b: refs/heads/master
c: ad74557
h: refs/heads/master
i:
  11773: 908a02a
  11771: d456ae8
  11767: 57fff13
  11759: d77fb2d
  11743: 4a922cf
  11711: f9d255f
  11647: c8c2704
  11519: c5cb1be
  11263: 64a15b2
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5d35704028d09a183448daceab5dcb94f21a3645
+refs/heads/master: ad74557a49d1dea428fb0ad60e75a5aa37610e1d

trunk/drivers/base/cpu.c

@@ -16,6 +16,8 @@ struct sysdev_class cpu_sysdev_class = {
 };
 EXPORT_SYMBOL(cpu_sysdev_class);
 
+static struct sys_device *cpu_sys_devices[NR_CPUS];
+
 #ifdef CONFIG_HOTPLUG_CPU
 int __attribute__((weak)) smp_prepare_cpu (int cpu)
 {
@@ -64,14 +66,15 @@ static void __devinit register_cpu_control(struct cpu *cpu)
 }
 void unregister_cpu(struct cpu *cpu, struct node *root)
 {
+	int logical_cpu = cpu->sysdev.id;
 
 	if (root)
 		sysfs_remove_link(&root->sysdev.kobj,
 				  kobject_name(&cpu->sysdev.kobj));
 	sysdev_remove_file(&cpu->sysdev, &attr_online);
 
 	sysdev_unregister(&cpu->sysdev);
-
+	cpu_sys_devices[logical_cpu] = NULL;
 	return;
 }
 #else /* ... !CONFIG_HOTPLUG_CPU */
@@ -103,10 +106,19 @@ int __devinit register_cpu(struct cpu *cpu, int num, struct node *root)
 					  kobject_name(&cpu->sysdev.kobj));
 	if (!error && !cpu->no_control)
 		register_cpu_control(cpu);
+	if (!error)
+		cpu_sys_devices[num] = &cpu->sysdev;
 	return error;
 }
 
-
+struct sys_device *get_cpu_sysdev(int cpu)
+{
+	if (cpu < NR_CPUS)
+		return cpu_sys_devices[cpu];
+	else
+		return NULL;
+}
+EXPORT_SYMBOL_GPL(get_cpu_sysdev);
 
 int __init cpu_dev_init(void)
 {

trunk/include/linux/cpu.h

@@ -32,6 +32,7 @@ struct cpu {
 };
 
 extern int register_cpu(struct cpu *, int, struct node *);
+extern struct sys_device *get_cpu_sysdev(int cpu);
 #ifdef CONFIG_HOTPLUG_CPU
 extern void unregister_cpu(struct cpu *, struct node *);
 #endif