#define task_pt_regs(task) user_regs(task_thread_info(task))
#define current_regs() task_pt_regs(current)
-static inline void prepare_to_copy(struct task_struct *tsk)
-{
-}
-
extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
unsigned long get_wchan(struct task_struct *p);