On Thu, Jul 02, 2020 at 03:01:59PM +0100, Al Viro wrote: > On Thu, Jul 02, 2020 at 11:34:31PM +1000, Michael Ellerman wrote: > > > I think we can do something to make it work. > > > > We don't have an equivalent of x86's ex_handler_uaccess(), so it's not > > quite as easy as whacking a user_access_end() in there. > > > > Probably the simplest option for us is to just handle it in our > > unsafe_op_wrap(). I'll try and come up with something tomorrow. > > The goal is to avoid using unsafe_op_wrap()...
Incidentally, the change Linus proposes would affect unsafe_put_user() as well. And you are not using unsafe_op_wrap() anywhere on that path...
