--- a/drivers/cbus/retu-wdt.c
+++ b/drivers/cbus/retu-wdt.c
@@ -56,7 +56,7 @@ static int counter_param = RETU_WDT_MAX_
 
 struct retu_wdt_dev {
 	struct device		*dev;
-	int			users;
+	unsigned long		users;
 	struct miscdevice	retu_wdt_miscdev;
 	struct delayed_work	ping_work;
 };
@@ -161,7 +161,7 @@ static DEVICE_ATTR(counter, S_IRUGO, ret
 
 static int retu_wdt_open(struct inode *inode, struct file *file)
 {
-	if (test_and_set_bit(1, (unsigned long *)&(retu_wdt->users)))
+	if (test_and_set_bit(0, &retu_wdt->users))
 		return -EBUSY;
 
 	file->private_data = (void *)retu_wdt;
@@ -177,7 +177,7 @@ static int retu_wdt_release(struct inode
 #ifndef CONFIG_WATCHDOG_NOWAYOUT
 	retu_wdt_ping_enable(retu_wdt);
 #endif
-	wdev->users = 0;
+	clear_bit(0, &retu_wdt->users);
 
 	return 0;
 }
@@ -264,7 +264,6 @@ static int __init retu_wdt_probe(struct
 		return -ENOMEM;
 
 	wdev->dev = &pdev->dev;
-	wdev->users = 0;
 
 	ret = device_create_file(&pdev->dev, &dev_attr_period);
 	if (ret) {