This fixes the following warning:

In file included from drivers/media/video/v4l2-subdev.c:29:
include/media/v4l2-ctrls.h:501: warning: 'struct file' declared inside
parameter list
include/media/v4l2-ctrls.h:501: warning: its scope is only this
definition or declaration, which is probably not what you want
include/media/v4l2-ctrls.h:509: warning: 'struct file' declared inside
parameter list

Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
---
 include/media/v4l2-ctrls.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index 33907a9..9022e1c 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -25,6 +25,7 @@
 #include <linux/videodev2.h>
 
 /* forward references */
+struct file;
 struct v4l2_ctrl_handler;
 struct v4l2_ctrl_helper;
 struct v4l2_ctrl;
-- 
Regards,

Laurent Pinchart

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