2017-10-10 12:57+0200, Paolo Bonzini: > Checking the mode is unnecessary, and is done without a memory barrier > separating the LAPIC write from the vcpu->mode read; in addition, > kvm_vcpu_wake_up is already doing a check for waiters on the wait queue > that has the same effect. > > In practice it's safe because spin_lock has full-barrier semantics on x86, > but don't be too clever. > > Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> > --- Reviewed-by: Radim Krčmář <rkrcmar@xxxxxxxxxx>
