Subject: Re: linux-next: build warning after merge of the v4l-dvb tree

From: Ezequiel Garcia <[email-masked]>
Date: Mon, 08 Feb 2021 13:42:21 -0300

Hi Stephen,

On Mon, 2021-02-08 at 23:37 +1100, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the v4l-dvb tree, today's linux-next build (htmldocs)
> produced this warning:
> 
> include/media/v4l2-async.h:178: warning: expecting prototype for v4l2_async_notifier_add_fwnode_subdev(). Prototype was for
> __v4l2_async_notifier_add_fwnode_subdev() instead
> include/media/v4l2-async.h:207: warning: expecting prototype for v4l2_async_notifier_add_fwnode_remote_subdev(). Prototype was for
> __v4l2_async_notifier_add_fwnode_remote_subdev() instead
> include/media/v4l2-async.h:230: warning: expecting prototype for v4l2_async_notifier_add_i2c_subdev(). Prototype was for
> __v4l2_async_notifier_add_i2c_subdev() instead
> 
> Maybe introduced by commit
> 
>   c1cc23625062 ("media: v4l2-async: Discourage use of v4l2_async_notifier_add_subdev")
> 

Thanks for spotting this. Should be fixed by:

diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h
index 6f22daa6f067..3785445282fc 100644
--- a/include/media/v4l2-async.h
+++ b/include/media/v4l2-async.h
@@ -157,7 +157,7 @@ int __v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier,
 				   struct v4l2_async_subdev *asd);
 
 /**
- * v4l2_async_notifier_add_fwnode_subdev - Allocate and add a fwnode async
+ * __v4l2_async_notifier_add_fwnode_subdev - Allocate and add a fwnode async
  *				subdev to the notifier's master asd_list.
  *
  * @notifier: pointer to &struct v4l2_async_notifier
@@ -181,7 +181,7 @@ __v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier,
 						   sizeof(__type)))
 
 /**
- * v4l2_async_notifier_add_fwnode_remote_subdev - Allocate and add a fwnode
+ * __v4l2_async_notifier_add_fwnode_remote_subdev - Allocate and add a fwnode
  *						  remote async subdev to the
  *						  notifier's master asd_list.
  *
@@ -210,7 +210,7 @@ __v4l2_async_notifier_add_fwnode_remote_subdev(struct v4l2_async_notifier *notif
 							  sizeof(__type)))
 
 /**
- * v4l2_async_notifier_add_i2c_subdev - Allocate and add an i2c async
+ * __v4l2_async_notifier_add_i2c_subdev - Allocate and add an i2c async
  *				subdev to the notifier's master asd_list.
  *
  * @notifier: pointer to &struct v4l2_async_notifier
@@ -228,7 +228,7 @@ struct v4l2_async_subdev *
 __v4l2_async_notifier_add_i2c_subdev(struct v4l2_async_notifier *notifier,
 				     int adapter_id, unsigned short address,
 				     unsigned int asd_struct_size);
-#define v4l2_async_notifier_add_i2c_subdev(__notifier, __adap, __addr, __type)	\
+#define v4l2_async_notifier_i2c(__notifier, __adap, __addr, __type)	\
 ((__type *)__v4l2_async_notifier_add_i2c_subdev(__notifier, __adap, __addr,	\
 						sizeof(__type)))

I'll send a fix for Mauro.

Best regards,
Ezequiel