linux-kernel - linux-next: build failure after merge of the bpf-next tree

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Date:   Thu, 28 Feb 2019 12:31:36 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Networking <netdev@...r.kernel.org>
Cc:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: linux-next: build failure after merge of the bpf-next tree

Hi all,

After merging the bpf-next tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:

kernel/sysctl.c:1238:13: error: 'sysctl_bpf_stats_enabled' undeclared here (not in a function); did you mean 'sysctl_base_table'?
   .data  = &sysctl_bpf_stats_enabled,
             ^~~~~~~~~~~~~~~~~~~~~~~~
             sysctl_base_table

Caused by commit

  492ecee892c2 ("bpf: enable program stats")

CONFIG_BPF=y
# CONFIG_BPF_SYSCALL is not set

I applied the following patch for today, but it should be done
properly. Also this patch leaves proc_dointvec_minmax_bpf_stats() as an
unused function.

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Thu, 28 Feb 2019 12:26:58 +1100
Subject: [PATCH] bpf: hack to make "enable program stats" build

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 kernel/sysctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 86e0771352f2..80a70f69cbd5 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1232,7 +1232,6 @@ static struct ctl_table kern_table[] = {
 		.extra1		= &one,
 		.extra2		= &one,
 	},
-#endif
 	{
 		.procname	= "bpf_stats_enabled",
 		.data		= &sysctl_bpf_stats_enabled,
@@ -1242,6 +1241,7 @@ static struct ctl_table kern_table[] = {
 		.extra1		= &zero,
 		.extra2		= &one,
 	},
+#endif
 #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU)
 	{
 		.procname	= "panic_on_rcu_stall",
-- 
2.20.1

-- 
Cheers,
Stephen Rothwell

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