Default value is specified in val=* as part of an argument notation.
The caller provides context and modifies the behavior of get_user_pages() via flags. Of particular interest is the FOLL_FORCE flag, which mem_rw() passes. This flag causes check_vma_flags (the access validation logic within get_user_pages()) to ignore writes to unwritable pages and allow the lookup to continue. The “punch through” semantics are attributed entirely to FOLL_FORCE. (comments my own)
，更多细节参见新收录的资料
Continue reading...，这一点在新收录的资料中也有详细论述
│ ├── radio_intercept.py # Scanner radio feed integration。新收录的资料是该领域的重要参考
从该品牌的推广视频中，“你的老婆推荐”几个字放置在平台官方提醒的常规位置，极易误导用户。