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

From: Greg KH <[email-masked]>
Date: Mon, 26 Aug 2019 08:30:24 +0200

On Mon, Aug 26, 2019 at 04:24:32PM +1000, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the staging tree, today's linux-next build (x86_64
> allmodconfig) produced this warning:
> 
> In file included from include/trace/events/erofs.h:8,
>                  from <command-line>:
> include/trace/events/erofs.h:28:37: warning: 'struct dentry' declared inside parameter list will not be visible outside of this definition or declaration
>   TP_PROTO(struct inode *dir, struct dentry *dentry, unsigned int flags),
>                                      ^~~~~~
> include/linux/tracepoint.h:233:34: note: in definition of macro '__DECLARE_TRACE'
>   static inline void trace_##name(proto)    \
>                                   ^~~~~
> include/linux/tracepoint.h:396:24: note: in expansion of macro 'PARAMS'
>   __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args),  \
>                         ^~~~~~
> include/linux/tracepoint.h:532:2: note: in expansion of macro 'DECLARE_TRACE'
>   DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
>   ^~~~~~~~~~~~~
> include/linux/tracepoint.h:532:22: note: in expansion of macro 'PARAMS'
>   DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
>                       ^~~~~~
> include/trace/events/erofs.h:26:1: note: in expansion of macro 'TRACE_EVENT'
>  TRACE_EVENT(erofs_lookup,
>  ^~~~~~~~~~~
> include/trace/events/erofs.h:28:2: note: in expansion of macro 'TP_PROTO'
>   TP_PROTO(struct inode *dir, struct dentry *dentry, unsigned int flags),
>   ^~~~~~~~
> 
> and moany more like this ...
> 
> Introduced by commit
> 
>   47e4937a4a7c ("erofs: move erofs out of staging")
> 
> (or, at least, exposed by it).  It needs, at least, a "struct dentry;"
> added to the file.

Odd, why has this never been seen before when the same files were in
drivers/staging/ and why 0-day isn't reporting this?

Gao, can you send me a patch for this?

thanks,

greg k-h