linux-kernel - [tip:perf/urgent] watchdog: Fix non-standard prototype of get_softlockup

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Date:	Tue, 24 May 2011 03:58:20 GMT
From:	tip-bot for Ingo Molnar <mingo@...e.hu>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, msb@...omium.org, hpa@...or.com,
	mingo@...hat.com, a.p.zijlstra@...llo.nl, marcin.slusarz@...il.com,
	fweisbec@...il.com, tglx@...utronix.de, sfr@...b.auug.org.au,
	mingo@...e.hu, dzickus@...hat.com
Subject: [tip:perf/urgent] watchdog: Fix non-standard prototype of get_softlockup_thresh()

Commit-ID:  6e9101aeec39961308176e0f59e73ac5d37d243a
Gitweb:     http://git.kernel.org/tip/6e9101aeec39961308176e0f59e73ac5d37d243a
Author:     Ingo Molnar <mingo@...e.hu>
AuthorDate: Tue, 24 May 2011 05:43:18 +0200
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Tue, 24 May 2011 05:53:39 +0200

watchdog: Fix non-standard prototype of get_softlockup_thresh()

This build warning slipped through:

  kernel/watchdog.c:102: warning: function declaration isn't a prototype

As reported by Stephen Rothwell.

Also address an unused variable warning that GCC 4.6.0 reports:
we cannot do anything about failed watchdog ops during CPU hotplug
(it's not serious enough to return an error from the notifier),
so ignore them.

Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
Cc: Mandeep Singh Baines <msb@...omium.org>
Cc: Marcin Slusarz <marcin.slusarz@...il.com>
Cc: Don Zickus <dzickus@...hat.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Link: http://lkml.kernel.org/r/20110524134129.8da27016.sfr@canb.auug.org.au
Signed-off-by: Ingo Molnar <mingo@...e.hu>
LKML-Reference: <20110517071642.GF22305@...e.hu>
---
 kernel/watchdog.c |   11 ++++-------
 1 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 6e63097..3d0c56a 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -98,7 +98,7 @@ __setup("nosoftlockup", nosoftlockup_setup);
  * the thresholds with a factor: we make the soft threshold twice the amount of
  * time the hard threshold is.
  */
-static int get_softlockup_thresh()
+static int get_softlockup_thresh(void)
 {
 	return watchdog_thresh * 2;
 }
@@ -415,15 +415,13 @@ static void watchdog_nmi_disable(int cpu) { return; }
 #endif /* CONFIG_HARDLOCKUP_DETECTOR */
 
 /* prepare/enable/disable routines */
-static int watchdog_prepare_cpu(int cpu)
+static void watchdog_prepare_cpu(int cpu)
 {
 	struct hrtimer *hrtimer = &per_cpu(watchdog_hrtimer, cpu);
 
 	WARN_ON(per_cpu(softlockup_watchdog, cpu));
 	hrtimer_init(hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 	hrtimer->function = watchdog_timer_fn;
-
-	return 0;
 }
 
 static int watchdog_enable(int cpu)
@@ -542,17 +540,16 @@ static int __cpuinit
 cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
 {
 	int hotcpu = (unsigned long)hcpu;
-	int err = 0;
 
 	switch (action) {
 	case CPU_UP_PREPARE:
 	case CPU_UP_PREPARE_FROZEN:
-		err = watchdog_prepare_cpu(hotcpu);
+		watchdog_prepare_cpu(hotcpu);
 		break;
 	case CPU_ONLINE:
 	case CPU_ONLINE_FROZEN:
 		if (watchdog_enabled)
-			err = watchdog_enable(hotcpu);
+			watchdog_enable(hotcpu);
 		break;
 #ifdef CONFIG_HOTPLUG_CPU
 	case CPU_UP_CANCELED:
--
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