BUF_NONE
NS_PRV_BUFTYPE(iovb) = BUF_NONE;
NS_PRV_BUFTYPE(iovb) = BUF_NONE;
NS_PRV_BUFTYPE(hb) = BUF_NONE;
NS_PRV_BUFTYPE(new_hb) = BUF_NONE;
BUF_NONE;
if (unlikely(NS_PRV_BUFTYPE(skb) == BUF_NONE)) {
NS_PRV_BUFTYPE(hb) = BUF_NONE;
NS_PRV_BUFTYPE(iovb) = BUF_NONE;
NS_PRV_BUFTYPE(hb) = BUF_NONE;
NS_PRV_BUFTYPE(iovb) = BUF_NONE;