linux-kernel - [PATCH] power_supply: wm97xx_battery: Use DEFINE_MUTEX() for work

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Date:	Mon, 28 Nov 2011 22:37:35 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Anton Vorontsov <cbouatmailru@...il.com>,
	Marek Vasut <marek.vasut@...il.com>
Subject: [PATCH] power_supply: wm97xx_battery: Use DEFINE_MUTEX() for
 work_lock

work_lock can be initialized automatically with
DEFINE_MUTEX() rather than explicitly calling mutex_init().

This patch also removes an unused bat_lock mutex.

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/power/wm97xx_battery.c |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)

diff --git a/drivers/power/wm97xx_battery.c b/drivers/power/wm97xx_battery.c
index cf8681c..eaa454b 100644
--- a/drivers/power/wm97xx_battery.c
+++ b/drivers/power/wm97xx_battery.c
@@ -25,9 +25,8 @@
 #include <linux/irq.h>
 #include <linux/slab.h>
 
-static DEFINE_MUTEX(bat_lock);
 static struct work_struct bat_work;
-static struct mutex work_lock;
+static DEFINE_MUTEX(work_lock);
 static int bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
 static enum power_supply_property *prop;
 
@@ -181,8 +180,6 @@ static int __devinit wm97xx_bat_probe(struct platform_device *dev)
 	if (dev->id != -1)
 		return -EINVAL;
 
-	mutex_init(&work_lock);
-
 	if (!pdata) {
 		dev_err(&dev->dev, "No platform_data supplied\n");
 		return -EINVAL;
-- 
1.7.5.4



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