slhc_remember
if (slhc_remember(ppp->vj, skb->data + 2, skb->len - 2) <= 0) {
EXPORT_SYMBOL(slhc_remember);
if (slhc_remember(sl->slcomp, sl->rbuff, count) <= 0)
int slhc_remember(struct slcompress *comp, unsigned char *icp, int isize);