diff options
Diffstat (limited to 'include/linux/cpu.h')
| -rw-r--r-- | include/linux/cpu.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/cpu.h b/include/linux/cpu.h index e9e7ebfd63d4..93853448aeb9 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -31,6 +31,24 @@ struct cpu { extern int register_cpu(struct cpu *, int, struct node *); extern struct class cpu_class; +struct notifier_block; + +#ifdef CONFIG_SMP +/* Need to know about CPUs going up/down? */ +extern int register_cpu_notifier(struct notifier_block *nb); +extern void unregister_cpu_notifier(struct notifier_block *nb); + +int cpu_up(unsigned int cpu); +#else +static inline int register_cpu_notifier(struct notifier_block *nb) +{ + return 0; +} +static inline void unregister_cpu_notifier(struct notifier_block *nb) +{ +} +#endif /* CONFIG_SMP */ + /* Stop CPUs going up and down. */ extern struct semaphore cpucontrol; #endif /* _LINUX_CPU_H_ */ |