windfarm got signal

[Johannes Berg]

Hey,

after cpu hotplug I decided to write some fake suspend routines for
ppc64 that always fail to see what all the drivers would say... The
first thing I saw was during the phase where all threads are stopped,
that windfarm got a signal!

Shortly after that, the fans were revved up fully but I guess that's
expected if the wf control loop exits.

So now I'm trying to see *why* it got a signal there. Any ideas? Is that
expected with pm and windfarm just does the wrong thing there by taking
the signal as a reason to exit the control thread?

[code in question is windfarm_core.c:wf_thread_func]

johannes
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