linux-kernel - [PATCH 09/12] rtc : Use mutex instead of semaphore in driver core

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Message-ID: <20071229011557.GJ2883@darkstar.te-china.tietoenator.com>
Date:	Sat, 29 Dec 2007 09:15:57 +0800
From:	Dave Young <hidave.darkstar@...il.com>
To:	a.zummo@...ertech.it
Cc:	linux-kernel@...r.kernel.org, rtc-linux@...glegroups.com
Subject: [PATCH 09/12] rtc : Use mutex instead of semaphore in driver core

Signed-off-by: Dave Young <hidave.darkstar@...il.com> 

---
drivers/rtc/interface.c |    4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff -upr linux/drivers/rtc/interface.c linux.new/drivers/rtc/interface.c
--- linux/drivers/rtc/interface.c	2007-12-28 10:41:42.000000000 +0800
+++ linux.new/drivers/rtc/interface.c	2007-12-28 10:43:51.000000000 +0800
@@ -256,7 +256,7 @@ struct rtc_device *rtc_class_open(char *
 	struct device *dev;
 	struct rtc_device *rtc = NULL;
 
-	down(&rtc_class->sem);
+	mutex_lock(&rtc_class->mutex);
 	list_for_each_entry(dev, &rtc_class->devices, node) {
 		if (strncmp(dev->bus_id, name, BUS_ID_SIZE) == 0) {
 			dev = get_device(dev);
@@ -272,7 +272,7 @@ struct rtc_device *rtc_class_open(char *
 			rtc = NULL;
 		}
 	}
-	up(&rtc_class->sem);
+	mutex_unlock(&rtc_class->mutex);
 
 	return rtc;
 }
--
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