KVM: MMU: fix missing post sync audit

Add AUDIT_POST_SYNC audit for long mode shadow page
Signed-off-by: NXiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

arch/x86/kvm/mmu.c

@@ -2540,6 +2540,7 @@ static void mmu_sync_roots(struct kvm_vcpu *vcpu)
 		hpa_t root = vcpu->arch.mmu.root_hpa;
 		sp = page_header(root);
 		mmu_sync_children(vcpu, sp);
+		trace_kvm_mmu_audit(vcpu, AUDIT_POST_SYNC);
 		return;
 	}
 	for (i = 0; i < 4; ++i) {