rds: fix building with IPV6=m

When CONFIG_RDS_TCP is built-in and CONFIG_IPV6 is a loadable
module, we get a link error agains the modular ipv6_chk_addr()
function:

net/rds/tcp.o: In function `rds_tcp_laddr_check':
tcp.c:(.text+0x3b2): undefined reference to `ipv6_chk_addr'

This adds back a dependency that forces RDS_TCP to also be
a loadable module when IPV6 is one.

Fixes: 763449ff1ef5 ("rds: Remove IPv6 dependency")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/rds/Kconfig b/net/rds/Kconfig
index 41f75563b54b1f02cb7e591b46096dd7721a44ae..01b3bd6a3708dece9e1e064c58e21c9d61ad8138 100644 (file)
--- a/net/rds/Kconfig
+++ b/net/rds/Kconfig
@@ -16,6 +16,7 @@ config RDS_RDMA
 config RDS_TCP
        tristate "RDS over TCP"
        depends on RDS
+       depends on IPV6 || !IPV6
        ---help---
          Allow RDS to use TCP as a transport.
          This transport does not support RDMA operations.