p_code           1137 kernel/exit.c  	int exit_code, *p_code, why;
p_code           1153 kernel/exit.c  	p_code = task_stopped_code(p, ptrace);
p_code           1154 kernel/exit.c  	if (unlikely(!p_code))
p_code           1157 kernel/exit.c  	exit_code = *p_code;
p_code           1162 kernel/exit.c  		*p_code = 0;