Re: [PATCH] selftests: rtnetlink: load fou module for kci_test_encap_fou()

[David Miller <davem@xxxxxxxxxxxxx>]

From: Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>
Date: Thu, 13 Aug 2020 12:44:22 +0800

> diff --git a/tools/testing/selftests/net/config b/tools/testing/selftests/net/config
> index 3b42c06b..96d2763 100644
> --- a/tools/testing/selftests/net/config
> +++ b/tools/testing/selftests/net/config
> @@ -31,3 +31,4 @@ CONFIG_NET_SCH_ETF=m
>  CONFIG_NET_SCH_NETEM=y
>  CONFIG_TEST_BLACKHOLE_DEV=m
>  CONFIG_KALLSYMS=y
> +CONFIG_NET_FOU

You need to assign it a value, not just add it to the file by itself.