Linux Kernel设备驱动模型之CPU相关初始化

void __init cpu_dev_init(void) {  if (subsys_system_register(&cpu_subsys, cpu_root_attr_groups))   panic("Failed to register CPU subsystem");

 cpu_dev_register_generic(); }

  struct bus_type cpu_subsys = {  .name = "cpu",  .dev_name = "cpu",  .match = cpu_subsys_match, #ifdef CONFIG_HOTPLUG_CPU  .online = cpu_subsys_online,  .offline = cpu_subsys_offline, #endif }; EXPORT_SYMBOL_GPL(cpu_subsys);  

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,  &dev_attr_isolated.attr, #ifdef CONFIG_NO_HZ_FULL  &dev_attr_nohz_full.attr, #endif #ifdef CONFIG_GENERIC_CPU_AUTOPROBE  &dev_attr_modalias.attr, #endif  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, };