V4L/DVB (9324): v4l2: add video_ioctl2_unlocked for unlocked_ioctl support.

Based on an older patch from Sakari Ailus.

Cc: Sakari Ailus <sakari.ailus@nokia.com>
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/v4l2-ioctl.c

@@ -1861,3 +1861,10 @@ int video_ioctl2(struct inode *inode, struct file *file,
 	return err;
 }
 EXPORT_SYMBOL(video_ioctl2);
+
+long video_ioctl2_unlocked(struct file *file,
+		 unsigned int cmd, unsigned long arg)
+{
+	return video_ioctl2(file->f_path.dentry->d_inode, file, cmd, arg);
+}
+EXPORT_SYMBOL(video_ioctl2_unlocked);

include/media/v4l2-ioctl.h

@@ -286,6 +286,8 @@ extern long v4l_compat_ioctl32(struct file *file, unsigned int cmd,
 
 extern int video_ioctl2(struct inode *inode, struct file *file,
 			unsigned int cmd, unsigned long arg);
+extern long video_ioctl2_unlocked(struct file *file,
+			unsigned int cmd, unsigned long arg);
 
 /* Include support for obsoleted stuff */
 extern int video_usercopy(struct inode *inode, struct file *file,