[ARM] 4657/1: AT91: Header definition update

[linux-2.6-omap-h63xx.git] / drivers / rtc / rtc-dev.c

diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
index 814583bd2fe709c1da0710808ed6f4cffbe8b50f..025c60a17a4a3c9841d4105bf0344a92f9c31510 100644 (file)
--- a/drivers/rtc/rtc-dev.c
+++ b/drivers/rtc/rtc-dev.c
@@ -26,10 +26,7 @@ static int rtc_dev_open(struct inode *inode, struct file *file)
                                        struct rtc_device, char_dev);
        const struct rtc_class_ops *ops = rtc->ops;
 
-       /* We keep the lock as long as the device is in use
-        * and return immediately if busy
-        */
-       if (!(mutex_trylock(&rtc->char_lock)))
+       if (test_and_set_bit_lock(RTC_DEV_BUSY, &rtc->flags))
                return -EBUSY;
 
        file->private_data = rtc;
@@ -43,8 +40,8 @@ static int rtc_dev_open(struct inode *inode, struct file *file)
                return 0;
        }
 
-       /* something has gone wrong, release the lock */
-       mutex_unlock(&rtc->char_lock);
+       /* something has gone wrong */
+       clear_bit_unlock(RTC_DEV_BUSY, &rtc->flags);
        return err;
 }
 
@@ -405,7 +402,7 @@ static int rtc_dev_release(struct inode *inode, struct file *file)
        if (rtc->ops->release)
                rtc->ops->release(rtc->dev.parent);
 
-       mutex_unlock(&rtc->char_lock);
+       clear_bit_unlock(RTC_DEV_BUSY, &rtc->flags);
        return 0;
 }
 
@@ -440,7 +437,6 @@ void rtc_dev_prepare(struct rtc_device *rtc)
 
        rtc->dev.devt = MKDEV(MAJOR(rtc_devt), rtc->id);
 
-       mutex_init(&rtc->char_lock);
 #ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
        INIT_WORK(&rtc->uie_task, rtc_uie_task);
        setup_timer(&rtc->uie_timer, rtc_uie_timer, (unsigned long)rtc);