On Mon, 25 Feb 2019 17:09:45 +0900 Masami Hiramatsu <mhiramat@xxxxxxxxxx> wrote: > > This should probably go with whatever effort makes nmi_uaccess_ok() > > available on all architectures. That being said, how about just > > making copy_from_user_nmi() work on all architectures, even if it just > > fails unconditionally on some of them? > > I think even if we have copy_from_user_nmi(), we need something like > nmi_uaccess_ok() because without it we can not correctly use > __copy_from_user_inatomic()... But wouldn't that just be part of the implementation of "copy_from_user_nmi()" as being in an NMI just assumes being inatomic? -- Steve
