netdev - [PATCH] rds: fix building with IPV6=m

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Message-Id: <20180814090752.1681486-1-arnd@arndb.de>
Date:   Tue, 14 Aug 2018 11:07:42 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Santosh Shilimkar <santosh.shilimkar@...cle.com>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Anders Roxell <anders.roxell@...aro.org>,
        Greg Thelen <gthelen@...gle.com>,
        Ka-Cheong Poon <ka-cheong.poon@...cle.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
        rds-devel@....oracle.com, linux-kernel@...r.kernel.org
Subject: [PATCH] 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: e65d4d96334e ("rds: Remove IPv6 dependency")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 net/rds/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/rds/Kconfig b/net/rds/Kconfig
index 41f75563b54b..01b3bd6a3708 100644
--- 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.
-- 
2.18.0