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From: Arnd Bergmann <arnd@arndb.de>
To: Luis Chamberlain <mcgrof@kernel.org>,
	Kees Cook <keescook@chromium.org>,
	Iurii Zaikin <yzaikin@google.com>,
	Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Song Liu <songliubraving@fb.com>
Cc: Arnd Bergmann <arnd@arndb.de>, Martin KaFai Lau <kafai@fb.com>,
	Yonghong Song <yhs@fb.com>, Andrii Nakryiko <andriin@fb.com>,
	John Fastabend <john.fastabend@gmail.com>,
	KP Singh <kpsingh@chromium.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	netdev@vger.kernel.org, bpf@vger.kernel.org
Subject: [PATCH] sysctl: fix unused function warning
Date: Tue,  5 May 2020 16:07:12 +0200
Message-ID: <20200505140734.503701-1-arnd@arndb.de> (raw)

The newly added bpf_stats_handler function has the wrong #ifdef
check around it, leading to an unused-function warning when
CONFIG_SYSCTL is disabled:

kernel/sysctl.c:205:12: error: unused function 'bpf_stats_handler' [-Werror,-Wunused-function]
static int bpf_stats_handler(struct ctl_table *table, int write,

Fix the check to match the reference.

Fixes: d46edd671a14 ("bpf: Sharing bpf runtime stats with BPF_ENABLE_STATS")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 kernel/sysctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 86ed5dd29a61..3b0cecf57e79 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -201,7 +201,7 @@ static int max_extfrag_threshold = 1000;
 
 #endif /* CONFIG_SYSCTL */
 
-#ifdef CONFIG_BPF_SYSCALL
+#if defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_SYSCTL)
 static int bpf_stats_handler(struct ctl_table *table, int write,
 			     void __user *buffer, size_t *lenp,
 			     loff_t *ppos)
-- 
2.26.0


             reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-05 14:07 Arnd Bergmann [this message]
2020-05-05 18:09 ` Martin KaFai Lau
2020-05-05 18:13 ` Luis Chamberlain
2020-05-05 18:24 ` Song Liu
2020-05-05 19:01   ` Alexei Starovoitov

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