[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>
diff --git a/arch/arm/common/rtctime.c b/arch/arm/common/rtctime.c
index 72b03f2..00f6278 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 @@
/*
* 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 @@
{
int ret;
- down(&rtc_sem);
+ mutex_lock(&rtc_mutex);
if (rtc_inuse) {
ret = -EBUSY;
@@ -373,7 +374,7 @@
rtc_inuse = 1;
}
}
- up(&rtc_sem);
+ mutex_unlock(&rtc_mutex);
return ret;
}
@@ -479,7 +480,7 @@
{
int ret = -EBUSY;
- down(&rtc_sem);
+ mutex_lock(&rtc_mutex);
if (rtc_ops == NULL) {
rtc_ops = ops;
@@ -488,7 +489,7 @@
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 @@
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);