INT51X1_HEADER_SIZE
dev->net->hard_header_len += INT51X1_HEADER_SIZE;
if (!(pskb_may_pull(skb, INT51X1_HEADER_SIZE))) {
int pack_with_header_len = pack_len + INT51X1_HEADER_SIZE;
(headroom + tailroom >= need_tail + INT51X1_HEADER_SIZE)) {
if (headroom < INT51X1_HEADER_SIZE || tailroom < need_tail) {
skb->data = memmove(skb->head + INT51X1_HEADER_SIZE,
INT51X1_HEADER_SIZE,
len = __skb_push(skb, INT51X1_HEADER_SIZE);