drivers/base/cpu.c

   1 /*
   2  * drivers/base/cpu.c - basic CPU class support
   3  */
   4
   5 #include <linux/sysdev.h>
   6 #include <linux/module.h>
   7 #include <linux/init.h>
   8 #include <linux/cpu.h>
   9 #include <linux/topology.h>
  10
  11
  12 struct sysdev_class cpu_sysdev_class = {
  13         set_kset_name("cpu"),
  14 };
  15 EXPORT_SYMBOL(cpu_sysdev_class);
  16
  17
  18 /*
  19  * register_cpu - Setup a driverfs device for a CPU.
  20  * @num - CPU number to use when creating the device.
  21  *
  22  * Initialize and register the CPU device.
  23  */
  24 int __init register_cpu(struct cpu *cpu, int num, struct node *root)
  25 {
  26         int error;
  27
  28         cpu->node_id = cpu_to_node(num);
  29         cpu->sysdev.id = num;
  30         cpu->sysdev.cls = &cpu_sysdev_class;
  31
  32         error = sys_device_register(&cpu->sysdev);
  33         if (!error && root)
  34                 error = sysfs_create_link(&root->sysdev.kobj,
  35                                           &cpu->sysdev.kobj,
  36                                           kobject_name(&cpu->sysdev.kobj));
  37         return error;
  38 }
  39
  40
  41
  42 int __init cpu_dev_init(void)
  43 {
  44         return sysdev_class_register(&cpu_sysdev_class);
  45 }