The last step is executing the writes. This is achieved through copy_to_user_page(), which is essentially a memcpy. Since the destination is the writable mapping from kmap(), this just works.
^ Wieacker, supra note 124, at 257.。业内人士推荐新收录的资料作为进阶阅读
從敲窗人到蠟燭鐘：那些沒有鬧鐘前叫你起床的「古董」。关于这个话题，新收录的资料提供了深入分析
Guards directory scanning of sensitive locations。新收录的资料对此有专业解读