1 files changed, 43 insertions, 0 deletions

diff --git a/include/linux/smpboot.h b/include/linux/smpboot.h
new file mode 100644
index 000000000000..e0106d8581d3
--- /dev/null
+++ b/include/linux/smpboot.h
@@ -0,0 +1,43 @@
+#ifndef _LINUX_SMPBOOT_H
+#define _LINUX_SMPBOOT_H
+
+#include <linux/types.h>
+
+struct task_struct;
+/* Cookie handed to the thread_fn*/
+struct smpboot_thread_data;
+
+/**
+ * struct smp_hotplug_thread - CPU hotplug related thread descriptor
+ * @store:              Pointer to per cpu storage for the task pointers
+ * @list:               List head for core management
+ * @thread_should_run:  Check whether the thread should run or not. Called with
+ *                      preemption disabled.
+ * @thread_fn:          The associated thread function
+ * @setup:              Optional setup function, called when the thread gets
+ *                      operational the first time
+ * @cleanup:            Optional cleanup function, called when the thread
+ *                      should stop (module exit)
+ * @park:               Optional park function, called when the thread is
+ *                      parked (cpu offline)
+ * @unpark:             Optional unpark function, called when the thread is
+ *                      unparked (cpu online)
+ * @thread_comm:        The base name of the thread
+ */
+struct smp_hotplug_thread {
+        struct task_struct __percpu     **store;
+        struct list_head                list;
+        int                             (*thread_should_run)(unsigned int cpu);
+        void                            (*thread_fn)(unsigned int cpu);
+        void                            (*setup)(unsigned int cpu);
+        void                            (*cleanup)(unsigned int cpu, bool online);
+        void                            (*park)(unsigned int cpu);
+        void                            (*unpark)(unsigned int cpu);
+        const char                      *thread_comm;
+};
+
+int smpboot_register_percpu_thread(struct smp_hotplug_thread *plug_thread);
+void smpboot_unregister_percpu_thread(struct smp_hotplug_thread *plug_thread);
+int smpboot_thread_schedule(void);
+
+#endif