linux-kernel - Re: [PATCH 2.6.23] ibmebus: Prevent bus

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Message-ID: <20070830212816.GA4263@austin.ibm.com>
Date:	Thu, 30 Aug 2007 16:28:16 -0500
From:	linas@...tin.ibm.com (Linas Vepstas)
To:	Joachim Fenkes <FENKES@...ibm.com>
Cc:	jschopp <jschopp@...tin.ibm.com>, Nathan Lynch <ntl@...ox.com>,
	Thomas Q Klein <tklein@...ibm.com>,
	Paul Mackerras <pmac@....ibm.com>,
	Jan-Bernd Themann <themann@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	LinuxPPC-Dev <linuxppc-dev@...abs.org>,
	Christoph Raisch <raisch@...ibm.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stefan Roscher <stefan.roscher@...ibm.com>
Subject: Re: [PATCH 2.6.23] ibmebus: Prevent bus_id collisions

On Thu, Aug 30, 2007 at 04:00:56PM +0200, Joachim Fenkes wrote:
> 
> Plus, I rather like using 
> the full_name since it also contains a descriptive name as opposed to 
> being just nondescript numbers, helping the layman (ie user) to make sense 
> out of a dev_id.

Yes, well, but no. The location code is useful as a geographical
location: slots and devices are physically labelled with stickers 
so you can tell which is which.  Handy when you have to unplug stuff. 
By contrast, the device-tree full_name is mostly just gobldy-gook, 
with some crazy phb numbering in there that, after four years of 
staring at them, I still can't reliably do anything useful with.  
Location codes are nice. 

--linas
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