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ops has been iterated to first element when call pre_exit, and
it needs to restore from save_ops, not save ops to save_ops
Fixes: d7d99872c1 ("netns: add pre_exit method to struct pernet_operations")
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>