linux-kernel - [PATCH 3/9] watchdog: move definition of 'watchdog_proc_mutex' outside of proc

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Message-Id: <1415118024-194247-4-git-send-email-dzickus@redhat.com>
Date:	Tue,  4 Nov 2014 11:20:18 -0500
From:	Don Zickus <dzickus@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	uobergfe@...hat.com, Don Zickus <dzickus@...hat.com>
Subject: [PATCH 3/9] watchdog: move definition of 'watchdog_proc_mutex' outside of proc_dowatchdog()

From: Ulrich Obergfell <uobergfe@...hat.com>

This series removes the proc_dowatchdog() function. Since multiple
new functions need the 'watchdog_proc_mutex' to serialize access to
the watchdog parameters in /proc/sys/kernel, move the mutex outside
of any function.

Signed-off-by: Ulrich Obergfell <uobergfe@...hat.com>
Signed-off-by: Don Zickus <dzickus@...hat.com>
---
 kernel/watchdog.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index dcf28b2..df4ef38 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -701,6 +701,8 @@ static int proc_watchdog_update(void)
 
 }
 
+static DEFINE_MUTEX(watchdog_proc_mutex);
+
 /*
  * proc handler for /proc/sys/kernel/nmi_watchdog,watchdog_thresh
  */
@@ -710,7 +712,6 @@ int proc_dowatchdog(struct ctl_table *table, int write,
 {
 	int err, old_thresh, old_enabled;
 	bool old_hardlockup;
-	static DEFINE_MUTEX(watchdog_proc_mutex);
 
 	mutex_lock(&watchdog_proc_mutex);
 	old_thresh = ACCESS_ONCE(watchdog_thresh);
-- 
1.7.1

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