linux-kernel - [PATCH] bpf: BPF_SYSCALL depends INET

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Message-Id: <20200723141914.20722-1-trix@redhat.com>
Date:   Thu, 23 Jul 2020 07:19:14 -0700
From:   trix@...hat.com
To:     ast@...nel.org, daniel@...earbox.net, kafai@...com,
        songliubraving@...com, yhs@...com, andriin@...com,
        john.fastabend@...il.com, kpsingh@...omium.org,
        masahiroy@...nel.org, mhiramat@...nel.org, rostedt@...dmis.org,
        akpm@...ux-foundation.org, will@...nel.org, krzk@...nel.org,
        patrick.bellasi@....com, dhowells@...hat.com,
        ebiederm@...ssion.com, hannes@...xchg.org
Cc:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org, Tom Rix <trix@...hat.com>
Subject: [PATCH] bpf: BPF_SYSCALL depends INET

From: Tom Rix <trix@...hat.com>

A link error

kernel/bpf/net_namespace.o: In function `bpf_netns_link_release':
net_namespace.c: undefined reference to `bpf_sk_lookup_enabled'

bpf_sk_lookup_enabled is defined with INET
net_namespace is controlled by BPF_SYSCALL

So add a depends on INET to BPF_SYSCALL

Signed-off-by: Tom Rix <trix@...hat.com>
---
 init/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/init/Kconfig b/init/Kconfig
index 7b8ef43e7fb4..817f70e6023c 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1663,6 +1663,7 @@ config BPF_SYSCALL
 	bool "Enable bpf() system call"
 	select BPF
 	select IRQ_WORK
+	depends on INET
 	default n
 	help
 	  Enable the bpf() system call that allows to manipulate eBPF
-- 
2.18.1