Symbol: IPV6_PMTUDISC_DONT
net/ipv6/ipv6_sockglue.c
481
if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT)
net/ipv6/udp.c
748
if (READ_ONCE(np->pmtudisc) != IPV6_PMTUDISC_DONT)