David S. Miller 9917e1e876 ipv4: Turn rt->rt_route_iif into rt->rt_is_input.
That is this value's only use, as a boolean to indicate whether
a route is an input route or not.

So implement it that way, using a u16 gap present in the struct
already.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-07-20 13:40:02 -07:00
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