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-rw-r--r--include/linux/cpu.h13
1 files changed, 9 insertions, 4 deletions
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 86980c68234..0ed1d4853c6 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -32,6 +32,7 @@ struct cpu {
};
extern int register_cpu(struct cpu *, int, struct node *);
+extern struct sys_device *get_cpu_sysdev(int cpu);
#ifdef CONFIG_HOTPLUG_CPU
extern void unregister_cpu(struct cpu *, struct node *);
#endif
@@ -41,6 +42,7 @@ struct notifier_block;
/* 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);
+extern int current_in_cpu_hotplug(void);
int cpu_up(unsigned int cpu);
@@ -53,16 +55,19 @@ static inline int register_cpu_notifier(struct notifier_block *nb)
static inline void unregister_cpu_notifier(struct notifier_block *nb)
{
}
+static inline int current_in_cpu_hotplug(void)
+{
+ return 0;
+}
#endif /* CONFIG_SMP */
extern struct sysdev_class cpu_sysdev_class;
#ifdef CONFIG_HOTPLUG_CPU
/* Stop CPUs going up and down. */
-extern struct semaphore cpucontrol;
-#define lock_cpu_hotplug() down(&cpucontrol)
-#define unlock_cpu_hotplug() up(&cpucontrol)
-#define lock_cpu_hotplug_interruptible() down_interruptible(&cpucontrol)
+extern void lock_cpu_hotplug(void);
+extern void unlock_cpu_hotplug(void);
+extern int lock_cpu_hotplug_interruptible(void);
#define hotcpu_notifier(fn, pri) { \
static struct notifier_block fn##_nb = \
{ .notifier_call = fn, .priority = pri }; \