KVM: add kvm_{test,clear}_request to replace {test,clear}_bit
Users were expected to use kvm_check_request() for testing and clearing, but request have expanded their use since then and some users want to only test or do a faster clear. Make sure that requests are not directly accessed with bit operations. Reviewed-by: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com> Reviewed-by: NAndrew Jones <drjones@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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