On Fri, 2017-06-02 at 11:39 +0200, Christophe LEROY wrote: > The difference between get_user() and __get_user() is that get_user() > performs an access_ok() in addition. > > Doesn't access_ok() only checks whether addr is below TASK_SIZE to > ensure it is a valid user address ?
Do you have a measurable improvement by skipping that check ? I agree with your reasoning but I'm also paranoid and so I wouldn't change it unless it's really worth it. Cheers, Ben.
