For 2.6, I changed the bridge forwarding table timeout code to keep
a threaded list of in order entries. Well, it turns out that this is
a performance hit because we end up constantly moving entries around
in the list.  Later patch changes this to be in place update with RCU.

This version just uses a 100ms garbage collection timer.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>