1#ifndef _LINUX_SMPBOOT_H
2#define _LINUX_SMPBOOT_H
3
4#include <linux/types.h>
5
6struct task_struct;
7/* Cookie handed to the thread_fn*/
8struct smpboot_thread_data;
9
10/**
11 * struct smp_hotplug_thread - CPU hotplug related thread descriptor
12 * @store:		Pointer to per cpu storage for the task pointers
13 * @list:		List head for core management
14 * @thread_should_run:	Check whether the thread should run or not. Called with
15 *			preemption disabled.
16 * @thread_fn:		The associated thread function
17 * @create:		Optional setup function, called when the thread gets
18 *			created (Not called from the thread context)
19 * @setup:		Optional setup function, called when the thread gets
20 *			operational the first time
21 * @cleanup:		Optional cleanup function, called when the thread
22 *			should stop (module exit)
23 * @park:		Optional park function, called when the thread is
24 *			parked (cpu offline)
25 * @unpark:		Optional unpark function, called when the thread is
26 *			unparked (cpu online)
27 * @pre_unpark:		Optional unpark function, called before the thread is
28 *			unparked (cpu online). This is not guaranteed to be
29 *			called on the target cpu of the thread. Careful!
30 * @selfparking:	Thread is not parked by the park function.
31 * @thread_comm:	The base name of the thread
32 */
33struct smp_hotplug_thread {
34	struct task_struct __percpu	**store;
35	struct list_head		list;
36	int				(*thread_should_run)(unsigned int cpu);
37	void				(*thread_fn)(unsigned int cpu);
38	void				(*create)(unsigned int cpu);
39	void				(*setup)(unsigned int cpu);
40	void				(*cleanup)(unsigned int cpu, bool online);
41	void				(*park)(unsigned int cpu);
42	void				(*unpark)(unsigned int cpu);
43	void				(*pre_unpark)(unsigned int cpu);
44	bool				selfparking;
45	const char			*thread_comm;
46};
47
48int smpboot_register_percpu_thread(struct smp_hotplug_thread *plug_thread);
49void smpboot_unregister_percpu_thread(struct smp_hotplug_thread *plug_thread);
50
51#endif
52