linux-kernel - [PATCH] kernel/watchdog: hide unused function

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Date:   Tue, 20 Jun 2017 22:48:44 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Arnd Bergmann <arnd@...db.de>, Don Zickus <dzickus@...hat.com>,
        Ingo Molnar <mingo@...nel.org>,
        Babu Moger <babu.moger@...cle.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] kernel/watchdog: hide unused function

watchdog_update_cpus() is defined unconditionally, but only used when
CONFIG_SYSCTL is defined:

kernel/watchdog.c:608:12: error: 'watchdog_update_cpus' defined but not used [-Werror=unused-function]

This adds another #ifdef around it.

Fixes: mmotm ("kernel/watchdog: provide watchdog_nmi_reconfigure() for arch watchdogs")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 kernel/watchdog.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 06cd965f64d2..95361f9f3f40 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -605,11 +605,13 @@ static void watchdog_disable_all_cpus(void)
 	}
 }
 
+#ifdef CONFIG_SYSCTL
 static int watchdog_update_cpus(void)
 {
 	return smpboot_update_cpumask_percpu_thread(
 		    &watchdog_threads, &watchdog_cpumask);
 }
+#endif
 
 #else /* SOFTLOCKUP */
 static int watchdog_park_threads(void)
@@ -630,10 +632,12 @@ static void watchdog_disable_all_cpus(void)
 {
 }
 
+#ifdef CONFIG_SYSCTL
 static int watchdog_update_cpus(void)
 {
 	return 0;
 }
+#endif
 
 static void set_sample_period(void)
 {
-- 
2.9.0