net/ipv6: Another followup to the fib6_info change

Last one - for this week.

Patches 1, 2 and 7 are more cleanup patches - removing dead code, moving code from a header to near its single caller, and updating function name.

Patches 3-5 do some refactoring leading up to patch 6 which fixes a NULL dereference. I have only managed to trigger a panic once, so I can not definitively confirm it addresses the problem but it seems pretty clear that it is a race on removing a 'from' reference on an rt6_info and another path using that 'from' value to do cookie checking.

David Ahern (7):
net/ipv6: Clean up rt expires helpers
net/ipv6: Rename rt6_get_cookie_safe
net/ipv6: Move rcu_read_lock to callers of ip6_rt_cache_alloc net/ipv6: Move rcu locking to callers of fib6_get_cookie_safe net/ipv6: Move release of fib6_info from pcpu routes to helper net/ipv6: Make from in rt6_info rcu protected net/ipv6: Remove unncessary check on f6i in fib6_check

 include/net/ip6_fib.h |  41 +++++------------
 net/ipv6/ip6_fib.c    |  45 ++++++++++--------
 net/ipv6/ip6_output.c |   9 +++-
 net/ipv6/route.c      | 124 ++++++++++++++++++++++++++++++++++++--------------
 4 files changed, 136 insertions(+), 83 deletions(-)

2.11.0