tree feac6ec40f28f12ea7bfee8cca2df719f1f22d50
parent 2db2d67e4cf6100249bad575d9c13c16fd7b06dc
author David S. Miller <davem@davemloft.net> 1341929298 -0700
committer David S. Miller <davem@davemloft.net> 1341985217 -0700

ipv4: Calling ->cow_metrics() now is a bug.

Nothing every writes to ipv4 metrics any longer.

PMTU is stored in rt->rt_pmtu.

Dynamic TCP metrics are stored in a special TCP metrics cache,
completely outside of the routes.

Therefore ->cow_metrics() can simply nothing more than a WARN_ON
trigger so we can catch anyone who tries to add new writes to
ipv4 route metrics.

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