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 * @selfparking: Thread is not parked by the park function. 28 * @thread_comm: The base name of the thread 29 */ 30 struct smp_hotplug_thread { 31 struct task_struct __percpu **store; 32 struct list_head list; 33 int (*thread_should_run)(unsigned int cpu); 34 void (*thread_fn)(unsigned int cpu); 35 void (*create)(unsigned int cpu); 36 void (*setup)(unsigned int cpu); 37 void (*cleanup)(unsigned int cpu, bool online); 38 void (*park)(unsigned int cpu); 39 void (*unpark)(unsigned int cpu); 40 bool selfparking; 41 const char *thread_comm; 42 }; 43 44 int smpboot_register_percpu_thread(struct smp_hotplug_thread *plug_thread); 45 void smpboot_unregister_percpu_thread(struct smp_hotplug_thread *plug_thread); 46 int smpboot_thread_schedule(void); 47 48 #endif 49