41 struct kthread {  struct
57 	container_of(vfork, struct kthread, exited)  argument
59 static inline struct kthread *to_kthread(struct task_struct *k)  in to_kthread()
64 static struct kthread *to_live_kthread(struct task_struct *k)  in to_live_kthread()
150 	struct kthread *kthread = to_kthread(task);  in probe_kthread_data()  local
153 	probe_kernel_read(&data, &kthread->data, sizeof(data));  in probe_kthread_data()
157 static void __kthread_parkme(struct kthread *self)  in __kthread_parkme()
175 static int kthread(void *_create)  in kthread()  function
181 	struct kthread self;  in kthread()
224 	pid = kernel_thread(kthread, create, CLONE_FS | CLONE_FILES | SIGCHLD);  in create_kthread()
346 static void __kthread_unpark(struct task_struct *k, struct kthread *kthread)  in __kthread_unpark()  argument
348 	clear_bit(KTHREAD_SHOULD_PARK, &kthread->flags);  in __kthread_unpark()
355 	if (test_and_clear_bit(KTHREAD_IS_PARKED, &kthread->flags)) {  in __kthread_unpark()
356 		if (test_bit(KTHREAD_IS_PER_CPU, &kthread->flags))  in __kthread_unpark()
357 			__kthread_bind(k, kthread->cpu, TASK_PARKED);  in __kthread_unpark()
372 	struct kthread *kthread = to_live_kthread(k);  in kthread_unpark()  local
374 	if (kthread)  in kthread_unpark()
375 		__kthread_unpark(k, kthread);  in kthread_unpark()
392 	struct kthread *kthread = to_live_kthread(k);  in kthread_park()  local
395 	if (kthread) {  in kthread_park()
396 		if (!test_bit(KTHREAD_IS_PARKED, &kthread->flags)) {  in kthread_park()
397 			set_bit(KTHREAD_SHOULD_PARK, &kthread->flags);  in kthread_park()
400 				wait_for_completion(&kthread->parked);  in kthread_park()
425 	struct kthread *kthread;  in kthread_stop()  local
431 	kthread = to_live_kthread(k);  in kthread_stop()
432 	if (kthread) {  in kthread_stop()
433 		set_bit(KTHREAD_SHOULD_STOP, &kthread->flags);  in kthread_stop()
434 		__kthread_unpark(k, kthread);  in kthread_stop()
436 		wait_for_completion(&kthread->exited);  in kthread_stop()