linux-kernel - Re: [RFC PATCH] include/linux/kernel.h: Add config option for pr

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Message-ID: <20101028042834.GA2219@ericsson.com>
Date:	Wed, 27 Oct 2010 21:28:34 -0700
From:	Guenter Roeck <guenter.roeck@...csson.com>
To:	Joe Perches <joe@...ches.com>
CC:	Jean Delvare <khali@...ux-fr.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC PATCH] include/linux/kernel.h: Add config option for
 pr_fmt(fmt)

On Wed, Oct 27, 2010 at 01:41:41PM -0400, Joe Perches wrote:
> On Tue, 2010-10-26 at 11:03 +0200, Jean Delvare wrote:
> > On Thu, 21 Oct 2010 19:19:42 -0700, Joe Perches wrote:
> > > Change the default #define pr_fmt(fmt) from:
> > > 	- #define pr_fmt(fmt) fmt
> > > to:
> > > 	- #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> > > This will standard use of prefixes and prevent the
> > > addition of new #defines when using pr_<level>.
> > I'm all for it!
> > > Adds a config option to use the old style if desired.
> > Not sure what the idea is. Once  pr_fmt() includes the module name, we
> > will drop hard-coded prefixes in all log messages throughout the kernel
> > tree. Once this is done, a kernel built with PR_FMT_IS_KBUILD_MODNAME=n
> > would become horribly confusing.
> 
> True.  The idea is to allow a transition period and remove
> this PR_FMT_IS_KBUILD_MODNAME config option later.
> 
Personally I would prefer to just make the change without config option.

However, if that is not acceptable, a config option which is enabled by default
would still be better than nothing - and much better than hundreds of pr_fmt()
spread throughout the code. Feel free to add my Acked-by, whatever that may help.

Guenter
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