Rik van Riel 9db284f303 kvm, rt: change async pagefault code locking for PREEMPT_RT ...

The async pagefault wake code can run from the idle task in exception
context, so everything here needs to be made non-preemptible.

Conversion to a simple wait queue and raw spinlock does the trick.

Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

2016-03-22 16:38:38 +01:00

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