linux-kernel - Re: linux-next: build failure after merge of the driver-core tree

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Date:	Tue, 01 May 2012 07:05:20 +0000
From:	Bart Van Assche <bvanassche@....org>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
CC:	Greg KH <greg@...ah.com>, linux-next@...r.kernel.org,
	linux-kernel@...r.kernel.org, Jim Cromie <jim.cromie@...il.com>,
	Roland Dreier <roland@...estorage.com>
Subject: Re: linux-next: build failure after merge of the driver-core tree

On 05/01/12 04:59, Stephen Rothwell wrote:

> After merging the driver-core tree, today's linux-next build
> (powerpc ppc64_defconfig) failed like this:
> 
> In file included from include/linux/kernel.h:23:0, from
> include/linux/cache.h:4, from include/linux/time.h:7, from
> include/linux/stat.h:60, from include/linux/module.h:10, from
> drivers/infiniband/ulp/srp/ib_srp.c:35: 
> include/linux/dynamic_debug.h: In function
> 'ddebug_dyndbg_module_param_cb': 
> include/linux/dynamic_debug.h:112:3: error: expected ')' before
> 'PFX'
> 
> Caused by commit b48420c1d301 ("dynamic_debug: make dynamic-debug
> work for module initialization") interacting with commit
> e0bda7d8c33e ("IB/srp: Use pr_fmt() and pr_err()/pr_warn()") from
> Linus' tree (added before v3.4-rc1).
> 
> I have used the driver-core tree from next-20120430 for today.


This reveals that the pr_warn() statement in that dynamic_debug patch
uses the pr_fmt() macro of the module from which it has been included
(e.g. ib_srp) instead that of the dynamic debug module itself. That
looks incorrect to me. How about moving the definition of
ddebug_dyndbg_module_param_cb() from include/linux/dynamic_debug.h
into lib/dynamic_debug.c ?

Bart.
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