Re: [PATCH] rds: fix building with IPV6=m

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On 8/14/2018 2:07 AM, Arnd Bergmann wrote:
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@xxxxxxxx>
---
  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.

Its weird depends on but probably ok since we get to module
to be enabled with or without IPV6.

Thanks for the patch Arnd !!

Acked-by: Santosh Shilimkar <santosh.shilimkar@xxxxxxxxxx>



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