ip_tunnel: fix building with NET_IP_TUNNEL=m

When af_mpls is built-in but the tunnel support is a module,
we get a link failure:

net/mpls/af_mpls.o: In function `mpls_init':
af_mpls.c:(.init.text+0xdc): undefined reference to `ip_tunnel_encap_add_ops'

This adds a Kconfig statement to prevent the broken
configuration and force mpls to be a module as well in
this case.

Fixes: bdc476413d ("ip_tunnel: add mpls over gre support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Amine Kherbouche <amine.kherbouche@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2017-10-11 15:55:31 +02:00 committed by David S. Miller
parent 08b49b9405
commit 0eb16f82ec
1 changed files with 1 additions and 0 deletions

View File

@ -24,6 +24,7 @@ config NET_MPLS_GSO
config MPLS_ROUTING
tristate "MPLS: routing support"
depends on NET_IP_TUNNEL || NET_IP_TUNNEL=n
---help---
Add support for forwarding of mpls packets.