tipc: fix compile error when IPV6=m and TIPC=y
When IPV6=m and TIPC=y, below error will appear during building kernel image: net/tipc/udp_media.c:196: undefined reference to `ip6_dst_lookup' make: *** [vmlinux] Error 1 As ip6_dst_lookup() is implemented in IPV6 and IPV6 is compiled as module, ip6_dst_lookup() is not built-in core kernel image. As a result, compiler cannot find 'ip6_dst_lookup' reference while compiling TIPC code into core kernel image. But with the method introduced by commit5f81bd2e5d
("ipv6: export a stub for IPv6 symbols used by vxlan"), we can avoid the compile error through "ipv6_stub" pointer to access ip6_dst_lookup(). Fixes:d0f91938be
("tipc: add ip/udp media type") Suggested-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -193,7 +193,7 @@ static int tipc_udp_send_msg(struct net *net, struct sk_buff *skb,
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.saddr = src->ipv6,
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.flowi6_proto = IPPROTO_UDP
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};
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err = ip6_dst_lookup(ub->ubsock->sk, &ndst, &fl6);
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err = ipv6_stub->ipv6_dst_lookup(ub->ubsock->sk, &ndst, &fl6);
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if (err)
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goto tx_error;
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ttl = ip6_dst_hoplimit(ndst);
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