diff options
Diffstat (limited to 'drivers/base/cpu.c')
| -rw-r--r-- | drivers/base/cpu.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index b79badd0f158..a95844790f7b 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -9,12 +9,15 @@ #include <linux/topology.h> #include <linux/device.h> +#include "base.h" struct sysdev_class cpu_sysdev_class = { set_kset_name("cpu"), }; 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) { @@ -63,6 +66,7 @@ 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, @@ -70,7 +74,7 @@ void unregister_cpu(struct cpu *cpu, struct node *root) sysdev_remove_file(&cpu->sysdev, &attr_online); sysdev_unregister(&cpu->sysdev); - + cpu_sys_devices[logical_cpu] = NULL; return; } #else /* ... !CONFIG_HOTPLUG_CPU */ @@ -102,10 +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) { |