Merge branch 'ipv6-optimize-rt6_score_route'

Eric Dumazet says:

====================
ipv6: optimize rt6_score_route()

This patch series remove an expensive rwlock acquisition
in rt6_check_neigh()/rt6_score_route().

First patch adds missing annotations, and second patch implements
the optimization.
====================

Link: https://lore.kernel.org/r/20230313201732.887488-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>