1 files changed, 13 insertions, 0 deletions

diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index c972f7ccb7d3..e287863ac053 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -117,6 +117,19 @@ extern void put_online_cpus(void);
 #define unregister_hotcpu_notifier(nb)  unregister_cpu_notifier(nb)
 int cpu_down(unsigned int cpu);
 
+#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
+extern void cpu_hotplug_driver_lock(void);
+extern void cpu_hotplug_driver_unlock(void);
+#else
+static inline void cpu_hotplug_driver_lock(void)
+{
+}
+
+static inline void cpu_hotplug_driver_unlock(void)
+{
+}
+#endif
+
 #else           /* CONFIG_HOTPLUG_CPU */
 
 #define get_online_cpus()       do { } while (0)