linux-kernel - Re: [GIT PULL] tracing fixes

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Message-ID: <20090921162211.GA844@elte.hu>
Date:	Mon, 21 Sep 2009 18:22:11 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Christoph Hellwig <hch@....de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Fr??d??ric Weisbecker <fweisbec@...il.com>
Subject: Re: [GIT PULL] tracing fixes


* Linus Torvalds <torvalds@...ux-foundation.org> wrote:

> On Mon, 21 Sep 2009, Ingo Molnar wrote:
> > 
> > Christoph Hellwig (1):
> >       tracing: Remove markers
> 
> This seems to result in:
> 
> 	kernel/module.c:2951: warning: ?struct marker? declared inside parameter list
> 	kernel/module.c:2951: warning: its scope is only this definition or declaration, which is probably not what you want
> 
> Hmm? Incomplete removal?

Hm, yes, you are right, we missed that. I noticed the modpost 
dependency:

  http://marc.info/?l=linux-kernel&m=125326944223679&w=2

but thought that it's safe and didnt notice that dangling 
module_layout() reference and the build warning it generates in the 
kernel.

I _think_ the patch below should do the trick - module_layout() appears 
to be an artificial symbol with 'significant' symbols listed in its 
argument list so that it gets a proper signature. Removing the marker 
symbol should thus be the solution, but i'm not 100% sure. Thoughts?

	Ingo

diff --git a/kernel/module.c b/kernel/module.c
index b6ee424..392eb3d 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2947,7 +2947,6 @@ void module_layout(struct module *mod,
 		   struct modversion_info *ver,
 		   struct kernel_param *kp,
 		   struct kernel_symbol *ks,
-		   struct marker *marker,
 		   struct tracepoint *tp)
 {
 }
--
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