[PATCH v4 1/8] watchdog: add the function watchdog_is_open

[Wenyou Yang]

Add the function watchdog_is_open to check whether or not
the /dev/watchdog? is opened

Signed-off-by: Wenyou Yang <wenyou.yang at atmel.com>
Cc: wim at iguana.be
Cc: linux-watchdog at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
---
 include/linux/watchdog.h |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/watchdog.h b/include/linux/watchdog.h
index e40cc2b..7ea4465 100644
--- a/include/linux/watchdog.h
+++ b/include/linux/watchdog.h
@@ -111,6 +111,14 @@ static inline bool watchdog_active(struct watchdog_device *wdd)
 	return test_bit(WDOG_ACTIVE, &wdd->status);
 }
 
+/* Use the following function to check whether or not
+ * the /dev/watchdog? is opened
+ */
+static inline bool watchdog_is_open(struct watchdog_device *wddev)
+{
+	return test_bit(WDOG_DEV_OPEN, &wddev->status);
+}
+
 /* Use the following function to set the nowayout feature */
 static inline void watchdog_set_nowayout(struct watchdog_device *wdd, bool nowayout)
 {
-- 
1.7.9.5