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

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  1 #ifndef _LINUX_SMPBOOT_H
  2 #define _LINUX_SMPBOOT_H
  3 
  4 #include <linux/types.h>
  5 
  6 struct task_struct;
  7 /* Cookie handed to the thread_fn*/
  8 struct 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  * @cpumask:            Internal state.  To update which threads are unparked,
 31  *                      call smpboot_update_cpumask_percpu_thread().
 32  * @selfparking:        Thread is not parked by the park function.
 33  * @thread_comm:        The base name of the thread
 34  */
 35 struct smp_hotplug_thread {
 36         struct task_struct __percpu     **store;
 37         struct list_head                list;
 38         int                             (*thread_should_run)(unsigned int cpu);
 39         void                            (*thread_fn)(unsigned int cpu);
 40         void                            (*create)(unsigned int cpu);
 41         void                            (*setup)(unsigned int cpu);
 42         void                            (*cleanup)(unsigned int cpu, bool online);
 43         void                            (*park)(unsigned int cpu);
 44         void                            (*unpark)(unsigned int cpu);
 45         void                            (*pre_unpark)(unsigned int cpu);
 46         cpumask_var_t                   cpumask;
 47         bool                            selfparking;
 48         const char                      *thread_comm;
 49 };
 50 
 51 int smpboot_register_percpu_thread_cpumask(struct smp_hotplug_thread *plug_thread,
 52                                            const struct cpumask *cpumask);
 53 
 54 static inline int
 55 smpboot_register_percpu_thread(struct smp_hotplug_thread *plug_thread)
 56 {
 57         return smpboot_register_percpu_thread_cpumask(plug_thread,
 58                                                       cpu_possible_mask);
 59 }
 60 
 61 void smpboot_unregister_percpu_thread(struct smp_hotplug_thread *plug_thread);
 62 int smpboot_update_cpumask_percpu_thread(struct smp_hotplug_thread *plug_thread,
 63                                          const struct cpumask *);
 64 
 65 #endif
 66 

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