dev_recursion_level
const struct ipv6_pinfo *np = skb->sk && !dev_recursion_level() ?
if (unlikely(dev_recursion_level() > IP_TUNNEL_RECURSION_LIMIT)) {
if (dev_recursion_level())
if (unlikely(dev_recursion_level() > IP_TUNNEL_RECURSION_LIMIT)) {
struct ipv6_pinfo *np = skb->sk && !dev_recursion_level() ?