inet: kill smallest_size and smallest_port

In inet_csk_get_port we seem to be using smallest_port to figure out where the
best place to look for a SO_REUSEPORT sk that matches with an existing set of
SO_REUSEPORT's.  However if we get to the logic

if (smallest_size != -1) {
	port = smallest_port;
	goto have_port;
}

we will do a useless search, because we would have already done the
inet_csk_bind_conflict for that port and it would have returned 1, otherwise we
would have gone to found_tb and succeeded.  Since this logic makes us do yet
another trip through inet_csk_bind_conflict for a port we know won't work just
delete this code and save us the time.

Signed-off-by: Josef Bacik <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

include/net/inet_hashtables.h

@@ -80,7 +80,6 @@ struct inet_bind_bucket {
 	signed char		fastreuse;
 	signed char		fastreuseport;
 	kuid_t			fastuid;
-	int			num_owners;
 	struct hlist_node	node;
 	struct hlist_head	owners;
 };