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 commit 5f81bd2e5d80 ("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: d0f91938bede ("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>
diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c
index ac89101..ef3d7aa 100644
--- a/net/tipc/udp_media.c
+++ b/net/tipc/udp_media.c
@@ -193,7 +193,7 @@
.saddr = src->ipv6,
.flowi6_proto = IPPROTO_UDP
};
- err = ip6_dst_lookup(ub->ubsock->sk, &ndst, &fl6);
+ err = ipv6_stub->ipv6_dst_lookup(ub->ubsock->sk, &ndst, &fl6);
if (err)
goto tx_error;
ttl = ip6_dst_hoplimit(ndst);
