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/* SPDX-License-Identifier: GPL-2.0 */
#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)
* @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);
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
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