From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner+w=401wt.eu-S1761102AbYHEWh3@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1761102AbYHEWh3 (ORCPT <rfc822;w@1wt.eu>);
	Tue, 5 Aug 2008 18:37:29 -0400
Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758091AbYHEWhS
	(ORCPT <rfc822;linux-kernel-outgoing>);
	Tue, 5 Aug 2008 18:37:18 -0400
Received: from mx2.suse.de ([195.135.220.15]:51997 "EHLO mx2.suse.de"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1756970AbYHEWhQ (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Tue, 5 Aug 2008 18:37:16 -0400
Date: Tue, 5 Aug 2008 15:31:17 -0700
From: Greg KH <gregkh@suse.de>
To: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>, linux-kernel@vger.kernel.org,
       linux-s390@vger.kernel.org,
       lf_kernel_messages@lists.linux-foundation.org,
       Andrew Morton <akpm@linux-foundation.org>,
       Michael Holzheu <holzheu@de.ibm.com>, Gerrit Huizenga <gh@us.ibm.com>,
       Randy Dunlap <randy.dunlap@oracle.com>, Jan Kara <jack@suse.cz>,
       Pavel Machek <pavel@ucw.cz>, Sam Ravnborg <sam@ravnborg.org>,
       Joe Perches <joe@perches.com>,
       Jochen =?iso-8859-1?B?Vm/f?= <jochen.voss@googlemail.com>,
       Kunai Takashi <kunai@linux-foundation.jp>,
       Tim Bird <tim.bird@am.sony.com>
Subject: Re: [patch 1/3] kmsg: Kernel message catalog macros.
Message-ID: <20080805223117.GA6552@suse.de>
References: <20080730165656.118280544@de.ibm.com> <20080730171156.824640459@de.ibm.com> <3ae72650807301502h3e54e80yb405af7192048b89@mail.gmail.com> <20080730220432.GA24800@suse.de> <1217495404.8555.20.camel@localhost>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1217495404.8555.20.camel@localhost>
User-Agent: Mutt/1.5.16 (2007-06-09)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Thu, Jul 31, 2008 at 11:10:04AM +0200, Martin Schwidefsky wrote:
> On Wed, 2008-07-30 at 15:04 -0700, Greg KH wrote:
> > On Thu, Jul 31, 2008 at 12:02:04AM +0200, Kay Sievers wrote:
> > > On Wed, Jul 30, 2008 at 18:56, Martin Schwidefsky
> > > <schwidefsky@de.ibm.com> wrote:
> > > 
> > > > +#define kmsg_dev_alert(id, dev, format, arg...) \
> > > > +       printk(__KMSG_CHECK(ALERT, id) KMSG_COMPONENT \
> > > > +               ": %s: " format, (dev)->bus_id , ## arg)
> > > 
> > > Care to use dev_name(), bus_id will be removed soon.
> > 
> > Hm, just use dev_printk() instead, it handles all of these kinds of
> > changes automatically.
> 
> Using dev_printk won't work because of the order of the elements of the
> printk. The kmsg tag should not have a "random" position in the printk
> but should be the first element. If we use dev_printk the kmsg tag will
> be the third element, for other kmsg printks it will be the first. In
> addition the kmsg message tag for the device drivers already includes
> the driver name ..

But the structure of dev_printk() is well definied and should be pretty
trival to parse even with missing fields.

And if not, fix up dev_printk() to properly delinate when we have
missing fields, why create a totally new thing here that we need to
convert subsystems into?

thanks,

greg k-h