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>
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