Lguest guests are UP, but the host is probably SMP, so real barriers are required in case the device thread and the guest are on different CPUs. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Lguest guests are UP, but the host is probably SMP, so real barriers are required in case the device thread and the guest are on different CPUs. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>