On Tue, May 7, 2019 at 7:48 AM Andy Lutomirski <l...@amacapital.net> wrote:
>
> IOW I think your trick only works if the old and new states are CALL, but we
> don’t know that until we’ve looked up the record, at which point we can just
> use the result of the lookup.
It would indeed only work for call instructions. I was thinking we'd
know that because we only ever batch up call instructions, though.
But it doesn't matter. I was looking at the ftrace code because I
thought there was some subtle timing bug or race or similar. But it
turned out my "memmove()" was the problem. See the patch I just sent
out.
Linus
