[PATCH 01/19] rtc: introduce rtc_device.ops_lock guard()

[alexandre.belloni@bootlin.com]

From: Alexandre Belloni <alexandre.belloni@bootlin.com>

Add guard class for rtc_device.ops_lock locks. This allows to simplify
error handling in interrupt handlers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
 include/linux/rtc.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/rtc.h b/include/linux/rtc.h
index 0f43b5027235..169d93520dbd 100644
--- a/include/linux/rtc.h
+++ b/include/linux/rtc.h
@@ -168,6 +168,9 @@ struct rtc_device {
 #define rtc_lock(d) mutex_lock(&d->ops_lock)
 #define rtc_unlock(d) mutex_unlock(&d->ops_lock)
 
+DEFINE_GUARD(rtc_ops, struct rtc_device *, mutex_lock(&_T->ops_lock),
+	     mutex_unlock(&_T->ops_lock))
+
 /* useful timestamps */
 #define RTC_TIMESTAMP_BEGIN_0000	-62167219200ULL /* 0000-01-01 00:00:00 */
 #define RTC_TIMESTAMP_BEGIN_1900	-2208988800LL /* 1900-01-01 00:00:00 */
-- 
2.56.0