- int kthread_park(struct task_struct * k);
- thread created by kthread_create.
Sets kthread_should_park for k to return true, wakes it, and waits for it to return. This can also be called after kthread_create instead of calling wake_up_process: the thread will park without calling threadfn.
Returns 0 if the thread is parked, -ENOSYS if the thread exited. If called by the kthread itself just the park bit is set.