Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / smpboot.h

diff --git a/kernel/include/linux/smpboot.h b/kernel/include/linux/smpboot.h
new file mode 100644 (file)
index 0000000..d600afb
--- /dev/null
+++ b/kernel/include/linux/smpboot.h
@@ -0,0 +1,51 @@
+#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
+ * @create:            Optional setup function, called when the thread gets
+ *                     created (Not called from the thread context)
+ * @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)
+ * @pre_unpark:                Optional unpark function, called before the thread is
+ *                     unparked (cpu online). This is not guaranteed to be
+ *                     called on the target cpu of the thread. Careful!
+ * @selfparking:       Thread is not parked by the park function.
+ * @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                            (*create)(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);
+       void                            (*pre_unpark)(unsigned int cpu);
+       bool                            selfparking;
+       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);
+
+#endif