PSP_TRL_SIZE
psp_st->tailen = PSP_TRL_SIZE;
int psp_encap = sizeof(struct udphdr) + PSP_HDR_SIZE + PSP_TRL_SIZE;
encap += strip_icv ? PSP_TRL_SIZE : 0;
pskb_trim(skb, skb->len - PSP_TRL_SIZE);