head_copy_off    1749 net/core/skbuff.c 	int head_copy_len, head_copy_off;
head_copy_off    1760 net/core/skbuff.c 	head_copy_off = 0;
head_copy_off    1764 net/core/skbuff.c 		head_copy_off = newheadroom - head_copy_len;
head_copy_off    1767 net/core/skbuff.c 	BUG_ON(skb_copy_bits(skb, -head_copy_len, n->head + head_copy_off,