It seems that there is no definition for config IP_GRE, and it is not a
dependency of other configs, so remove it.

linux$ find -name Kconfig | xargs grep "IP_GRE"
<-- nothing

There is a IPV6_GRE config defined in net/ipv6/Kconfig. It only depends
on NET_IPGRE_DEMUX but not IP_GRE.

Fixes: 04fe7c5029cb ("selftests: fill in some missing configs for net")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Yujie Liu <yujie.liu@intel.com>
---
 tools/testing/selftests/net/config | 1 -
 1 file changed, 1 deletion(-)

diff --git a/tools/testing/selftests/net/config b/tools/testing/selftests/net/config
index d4891f7a2bfa..f46e27cd1e70 100644
--- a/tools/testing/selftests/net/config
+++ b/tools/testing/selftests/net/config
@@ -26,7 +26,6 @@ CONFIG_INET_ESP=y
 CONFIG_INET_ESP_OFFLOAD=y
 CONFIG_NET_FOU=y
 CONFIG_NET_FOU_IP_TUNNELS=y
-CONFIG_IP_GRE=m
 CONFIG_NETFILTER=y
 CONFIG_NETFILTER_ADVANCED=y
 CONFIG_NF_CONNTRACK=m
-- 
2.34.1

On Mon, 24 Jun 2024 13:55:39 +0800 Yujie Liu wrote:
> It seems that there is no definition for config IP_GRE, and it is not a
> dependency of other configs, so remove it.
> 
> linux$ find -name Kconfig | xargs grep "IP_GRE"
> <-- nothing
> 
> There is a IPV6_GRE config defined in net/ipv6/Kconfig. It only depends
> on NET_IPGRE_DEMUX but not IP_GRE.
> 
> Fixes: 04fe7c5029cb ("selftests: fill in some missing configs for net")
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Yujie Liu <yujie.liu@intel.com>

Patch makes sense, that said it's harmless so I'd suggest net-next.

Acked-by: Jakub Kicinski <kuba@kernel.org>