Merge branch 'ipv6-route-rcu'

Paolo Abeni says:

====================
ipv6: route: enforce RCU protection for fib6_info->from

This series addresses a couple of RCU left-over dating back to rt6_info->from
conversion to RCU

v1 -> v2:
 - fix a possible race in patch 1
====================

Signed-off-by: David S. Miller <davem@davemloft.net>