
Add RCU-enabled variants on the existing bsd DQ facility. Each operation has the same interface as the existing (non-RCU) version. Also, each operation is implemented as macro. Using the RCU-enabled QLIST, existing QLIST users will be able to convert to RCU without using a different list interface. Signed-off-by: Mike Day <ncmike@ncultra.org> Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>