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TOMOYO Linux Cross Reference
Linux/include/linux/smpboot.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef _LINUX_SMPBOOT_H
  3 #define _LINUX_SMPBOOT_H
  4 
  5 #include <linux/types.h>
  6 
  7 struct task_struct;
  8 /* Cookie handed to the thread_fn*/
  9 struct smpboot_thread_data;
 10 
 11 /**
 12  * struct smp_hotplug_thread - CPU hotplug related thread descriptor
 13  * @store:              Pointer to per cpu storage for the task pointers
 14  * @list:               List head for core management
 15  * @thread_should_run:  Check whether the thread should run or not. Called with
 16  *                      preemption disabled.
 17  * @thread_fn:          The associated thread function
 18  * @create:             Optional setup function, called when the thread gets
 19  *                      created (Not called from the thread context)
 20  * @setup:              Optional setup function, called when the thread gets
 21  *                      operational the first time
 22  * @cleanup:            Optional cleanup function, called when the thread
 23  *                      should stop (module exit)
 24  * @park:               Optional park function, called when the thread is
 25  *                      parked (cpu offline)
 26  * @unpark:             Optional unpark function, called when the thread is
 27  *                      unparked (cpu online)
 28  * @selfparking:        Thread is not parked by the park function.
 29  * @thread_comm:        The base name of the thread
 30  */
 31 struct smp_hotplug_thread {
 32         struct task_struct __percpu     **store;
 33         struct list_head                list;
 34         int                             (*thread_should_run)(unsigned int cpu);
 35         void                            (*thread_fn)(unsigned int cpu);
 36         void                            (*create)(unsigned int cpu);
 37         void                            (*setup)(unsigned int cpu);
 38         void                            (*cleanup)(unsigned int cpu, bool online);
 39         void                            (*park)(unsigned int cpu);
 40         void                            (*unpark)(unsigned int cpu);
 41         bool                            selfparking;
 42         const char                      *thread_comm;
 43 };
 44 
 45 int smpboot_register_percpu_thread(struct smp_hotplug_thread *plug_thread);
 46 
 47 void smpboot_unregister_percpu_thread(struct smp_hotplug_thread *plug_thread);
 48 
 49 #endif
 50 

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