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H A Dkvm-s390.cdiff 785dbef407d8b3c82348aba2689e493c752c62ec Thu Apr 16 16:58:22 CEST 2015 Christian Borntraeger <borntraeger@de.ibm.com> KVM: s390: optimize round trip time in request handling

The fast path for a sie exit is that no kvm reqest is pending.
Make an early check to skip all single bit checks.

Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>