p_tstamp          489 net/ipv4/route.c 	u32 *p_tstamp = ip_tstamps + hash % IP_IDENTS_SZ;
p_tstamp          491 net/ipv4/route.c 	u32 old = READ_ONCE(*p_tstamp);
p_tstamp          495 net/ipv4/route.c 	if (old != now && cmpxchg(p_tstamp, old, now) == old)