KSF_ACCEPTING
if (priv->flags & KSF_ACCEPTING) {
priv->flags &= ~KSF_ACCEPTING;
if (priv->flags & KSF_ACCEPTING)
priv->flags |= KSF_ACCEPTING;
if (priv->flags & KSF_ACCEPTING) {
priv->flags &= ~KSF_ACCEPTING;
if (priv->flags & KSF_ACCEPTING)
priv->flags |= KSF_ACCEPTING;