---

yaml
---
r: 242119
b: refs/heads/master
c: dfddb24
h: refs/heads/master
i:
  242117: 2e1178d
  242115: 15cce80
  242111: bf5ced2
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 73cb42068cff419e72456940c713ceb5efa68c2a
+refs/heads/master: dfddb2441f39e8c0254504516be35b854addf6fa

trunk/drivers/media/video/v4l2-fh.c

@@ -109,3 +109,17 @@ int v4l2_fh_release(struct file *filp)
 	return 0;
 }
 EXPORT_SYMBOL_GPL(v4l2_fh_release);
+
+int v4l2_fh_is_singular(struct v4l2_fh *fh)
+{
+	unsigned long flags;
+	int is_singular;
+
+	if (fh == NULL || fh->vdev == NULL)
+		return 0;
+	spin_lock_irqsave(&fh->vdev->fh_lock, flags);
+	is_singular = list_is_singular(&fh->list);
+	spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
+	return is_singular;
+}
+EXPORT_SYMBOL_GPL(v4l2_fh_is_singular);

trunk/include/media/v4l2-fh.h

@@ -77,5 +77,18 @@ void v4l2_fh_exit(struct v4l2_fh *fh);
  * v4l2_fh struct) is NULL. This function always returns 0.
  */
 int v4l2_fh_release(struct file *filp);
+/*
+ * Returns 1 if this filehandle is the only filehandle opened for the
+ * associated video_device. If fh is NULL, then it returns 0.
+ */
+int v4l2_fh_is_singular(struct v4l2_fh *fh);
+/*
+ * Helper function with struct file as argument. If filp->private_data is
+ * NULL, then it will return 0.
+ */
+static inline int v4l2_fh_is_singular_file(struct file *filp)
+{
+	return v4l2_fh_is_singular(filp->private_data);
+}
 
 #endif /* V4L2_EVENT_H */