From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH V3 net-next 01/15] net: introduce keepalive function in
 struct proto
Date: Fri, 25 Nov 2016 20:41:38 -0500 (EST)
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From: Ursula Braun <ubraun@linux.vnet.ibm.com>
Date: Thu, 24 Nov 2016 16:06:31 +0100

> diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
> index 3ea1cf8..9b1602a 100644
> --- a/net/ipv4/tcp_timer.c
> +++ b/net/ipv4/tcp_timer.c
> @@ -617,6 +617,7 @@ void tcp_set_keepalive(struct sock *sk, int val)
>  	else if (!val)
>  		inet_csk_delete_keepalive_timer(sk);
>  }
> +EXPORT_SYMBOL(tcp_set_keepalive);

Please use EXPORT_SYMBOL_GPL().