4.13-rc3: Unrecoverable exception 4100

[Michael Ellerman]

Andreas Schwab <schwab at linux-m68k.org> writes:

> On Aug 07 2017, Michael Ellerman <mpe at ellerman.id.au> wrote:
>
>> Ah of course. Not sure why I haven't seen it in any of my testing :/
>
> It took me a whole gcc bootstrap to trigger it.

OK. I tried a few kernel builds, but I guess a GCC bootstrap takes a
while longer ;)

The other thing is most of our systems now have 1T segments, which means
you're less likely to take an SLB miss in the first place. Though we do
have disable_1t_segments for turning them off, precisely to test this
kind of code.

cheers