seg6_push_hmac
extern int seg6_push_hmac(struct net *net, struct in6_addr *saddr,
seg6_push_hmac(net, saddr, sr_phdr);
EXPORT_SYMBOL(seg6_push_hmac);
err = seg6_push_hmac(net, &hdr->saddr, isrh);
err = seg6_push_hmac(net, &hdr->saddr, isrh);
err = seg6_push_hmac(net, &hdr->saddr, isrh);