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authorArjan van de Ven <arjan@infradead.org>2006-01-12 18:42:23 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-01-12 18:42:23 +0000
commit00431707be0cc1236ee08459367872b57da5be29 (patch)
tree0a57cbf54f1fcc9ef2852e68e96c3b99e1b903d8 /arch/arm/common
parentf4619025a51747a3788fd1bb6bdc46e368a889a7 (diff)
[ARM] Convert some arm semaphores to mutexes
The arm clock semaphores are strict mutexes, convert them to the new mutex implementation Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/common')
-rw-r--r--arch/arm/common/rtctime.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/arch/arm/common/rtctime.c b/arch/arm/common/rtctime.c
index 72b03f201eb9..00f6278f42b8 100644
--- a/arch/arm/common/rtctime.c
+++ b/arch/arm/common/rtctime.c
@@ -18,6 +18,7 @@
#include <linux/miscdevice.h>
#include <linux/spinlock.h>
#include <linux/device.h>
+#include <linux/mutex.h>
#include <asm/rtc.h>
#include <asm/semaphore.h>
@@ -34,7 +35,7 @@ static unsigned long rtc_irq_data;
/*
* rtc_sem protects rtc_inuse and rtc_ops
*/
-static DECLARE_MUTEX(rtc_sem);
+static DEFINE_MUTEX(rtc_mutex);
static unsigned long rtc_inuse;
static struct rtc_ops *rtc_ops;
@@ -355,7 +356,7 @@ static int rtc_open(struct inode *inode, struct file *file)
{
int ret;
- down(&rtc_sem);
+ mutex_lock(&rtc_mutex);
if (rtc_inuse) {
ret = -EBUSY;
@@ -373,7 +374,7 @@ static int rtc_open(struct inode *inode, struct file *file)
rtc_inuse = 1;
}
}
- up(&rtc_sem);
+ mutex_unlock(&rtc_mutex);
return ret;
}
@@ -479,7 +480,7 @@ int register_rtc(struct rtc_ops *ops)
{
int ret = -EBUSY;
- down(&rtc_sem);
+ mutex_lock(&rtc_mutex);
if (rtc_ops == NULL) {
rtc_ops = ops;
@@ -488,7 +489,7 @@ int register_rtc(struct rtc_ops *ops)
create_proc_read_entry("driver/rtc", 0, NULL,
rtc_read_proc, ops);
}
- up(&rtc_sem);
+ mutex_unlock(&rtc_mutex);
return ret;
}
@@ -496,12 +497,12 @@ EXPORT_SYMBOL(register_rtc);
void unregister_rtc(struct rtc_ops *rtc)
{
- down(&rtc_sem);
+ mutex_lock(&rtc_mutex);
if (rtc == rtc_ops) {
remove_proc_entry("driver/rtc", NULL);
misc_deregister(&rtc_miscdev);
rtc_ops = NULL;
}
- up(&rtc_sem);
+ mutex_unlock(&rtc_mutex);
}
EXPORT_SYMBOL(unregister_rtc);