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); 50int smpboot_thread_schedule(void); 51 52#endif 53