diff options
Diffstat (limited to 'drivers/base/cpu.c')
| -rw-r--r-- | drivers/base/cpu.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index 6ef3069b5710..b79badd0f158 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -16,6 +16,11 @@ struct sysdev_class cpu_sysdev_class = { EXPORT_SYMBOL(cpu_sysdev_class); #ifdef CONFIG_HOTPLUG_CPU +int __attribute__((weak)) smp_prepare_cpu (int cpu) +{ + return 0; +} + static ssize_t show_online(struct sys_device *dev, char *buf) { struct cpu *cpu = container_of(dev, struct cpu, sysdev); @@ -36,7 +41,11 @@ static ssize_t store_online(struct sys_device *dev, const char *buf, kobject_hotplug(&dev->kobj, KOBJ_OFFLINE); break; case '1': - ret = cpu_up(cpu->sysdev.id); + ret = smp_prepare_cpu(cpu->sysdev.id); + if (!ret) + ret = cpu_up(cpu->sysdev.id); + if (!ret) + kobject_hotplug(&dev->kobj, KOBJ_ONLINE); break; default: ret = -EINVAL; |