apm_emulation regression

[Johannes Berg]

> > It can use the new notifier that happens before freezing yes. Johannes,
> > I think that's pretty much what my old powermac implementation did
> > (using my private notifier scheme I had there), might be worth reviving
> > that bit and sticking it into the generic apm_emu ...
> 
> Note that you may want to improve on it with a timeout in case userspace
> doesn't ack...

Yeah heh. I'll take a look, shouldn't be too hard. Except I'm not
exactly sure how to test it.

johannes
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