diff options
| -rw-r--r-- | include/linux/cpu.h | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/include/linux/cpu.h b/include/linux/cpu.h index 71dc6ba4f73..bf00ce6ecad 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -24,6 +24,7 @@ #include <linux/compiler.h> #include <linux/cpumask.h> #include <asm/semaphore.h> +#include <linux/mutex.h> struct cpu { int node_id; /* The node which contains the CPU */ @@ -74,6 +75,17 @@ extern struct sysdev_class cpu_sysdev_class; #ifdef CONFIG_HOTPLUG_CPU /* Stop CPUs going up and down. */ + +static inline void cpuhotplug_mutex_lock(struct mutex *cpu_hp_mutex) +{ + mutex_lock(cpu_hp_mutex); +} + +static inline void cpuhotplug_mutex_unlock(struct mutex *cpu_hp_mutex) +{ + mutex_unlock(cpu_hp_mutex); +} + extern void lock_cpu_hotplug(void); extern void unlock_cpu_hotplug(void); #define hotcpu_notifier(fn, pri) { \ @@ -85,7 +97,14 @@ extern void unlock_cpu_hotplug(void); #define unregister_hotcpu_notifier(nb) unregister_cpu_notifier(nb) int cpu_down(unsigned int cpu); #define cpu_is_offline(cpu) unlikely(!cpu_online(cpu)) -#else + +#else /* CONFIG_HOTPLUG_CPU */ + +static inline void cpuhotplug_mutex_lock(struct mutex *cpu_hp_mutex) +{ } +static inline void cpuhotplug_mutex_unlock(struct mutex *cpu_hp_mutex) +{ } + #define lock_cpu_hotplug() do { } while (0) #define unlock_cpu_hotplug() do { } while (0) #define lock_cpu_hotplug_interruptible() 0 @@ -95,7 +114,7 @@ int cpu_down(unsigned int cpu); /* CPUs don't go offline once they're online w/o CONFIG_HOTPLUG_CPU */ static inline int cpu_is_offline(int cpu) { return 0; } -#endif +#endif /* CONFIG_HOTPLUG_CPU */ #ifdef CONFIG_SUSPEND_SMP extern int disable_nonboot_cpus(void); |