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ip_idents_reserve is only used in net/ipv4/route.c. Make it static
and remove the export.
Signed-off-by: David Ahern <dsahern@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>