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smc_hash_sk and smc_unhash_sk are only used in af_smc.c, so make them static and remove the output symbol. They can be called under the path .prot->hash()/unhash(). Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com> Reviewed-by: Wen Gu <guwen@linux.alibaba.com> Reviewed-by: Simon Horman <horms@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>