407a408,411
> #if defined(KERNEL) || defined(_KERNEL)
> /*
> * No backward jumps allowed.
> */
408a413,419
> #else
> /*
> * XXX - we currently implement "ip6 protochain"
> * with backward jumps, so sign-extend pc->k.
> */
> pc += (bpf_int32)pc->k;
> #endif