newtailroom      1122 include/linux/skbuff.h 				int newtailroom, gfp_t priority);
newtailroom      1739 net/core/skbuff.c 				int newheadroom, int newtailroom,
newtailroom      1745 net/core/skbuff.c 	struct sk_buff *n = __alloc_skb(newheadroom + skb->len + newtailroom,