linux-kernel - [PATCH] kprobes: make wait_for_kprobe_optimizer as __maybe

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Date:	Mon, 25 Jan 2016 17:00:10 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
	"David S. Miller" <davem@...emloft.net>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org
Subject: [PATCH] kprobes: make wait_for_kprobe_optimizer as __maybe_unused

wait_for_kprobe_optimizer is only used when CONFIG_SYSCTL or CONFIG_DEBUG_FS
is enabled, otherwise we get a build warning

kernel/kprobes.c:566:13: error: 'wait_for_kprobe_optimizer' defined but not used [-Werror=unused-function]

This marks the function as __maybe_unused to shut up that warning.
We could do also add more #ifdef, but that would be a little more
ugly in this case.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 kernel/kprobes.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index d10ab6b9b5e0..12c0e0a02a6e 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -563,7 +563,7 @@ static void kprobe_optimizer(struct work_struct *work)
 }
 
 /* Wait for completing optimization and unoptimization */
-static void wait_for_kprobe_optimizer(void)
+static void __maybe_unused wait_for_kprobe_optimizer(void)
 {
 	mutex_lock(&kprobe_mutex);
 
-- 
2.7.0