BUF_LG
NS_PRV_BUFTYPE(lb) = BUF_LG;
if (NS_PRV_BUFTYPE(skb) != BUF_LG) {
NS_PRV_BUFTYPE(new_lb) = BUF_LG;
NS_PRV_BUFTYPE(new_lb) = BUF_LG;
NS_PRV_BUFTYPE(lb) = BUF_LG;
NS_PRV_BUFTYPE(lb) = BUF_LG;