linux-kernel - Re: [PATCHv4 1/4] procfs: Introduce socinfo under /proc

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Message-ID: <20100511062131.GA24401@n2100.arm.linux.org.uk>
Date:	Tue, 11 May 2010 07:21:31 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Paul Mundt <lethal@...ux-sh.org>
Cc:	Eduardo Valentin <eduardo.valentin@...ia.com>,
	ext Tony Lindgren <tony@...mide.com>,
	"De-Schrijver Peter (Nokia-D/Helsinki)" 
	<Peter.De-Schrijver@...ia.com>,
	LKML <linux-kernel@...r.kernel.org>, Ambresh <a0393775@...com>,
	ext Kevin Hilman <khilman@...prootsystems.com>,
	"santosh.shilimkar@...com" <santosh.shilimkar@...com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux-OMAP <linux-omap@...r.kernel.org>,
	"Balbi Felipe (Nokia-D/Helsinki)" <felipe.balbi@...ia.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCHv4 1/4] procfs: Introduce socinfo under /proc

On Tue, May 11, 2010 at 12:14:47PM +0900, Paul Mundt wrote:
> On Mon, May 10, 2010 at 03:55:49PM +0300, Eduardo Valentin wrote:
> > On Mon, May 10, 2010 at 02:39:02PM +0200, ext Paul Mundt wrote:
> > > Note that in the cpuinfo case there is often special handling for the
> > > single (or boot CPU) case, such as printing out a descriptor for the
> > > machine type and so on. You might be better off just extending cpuinfo
> > > rather than introducing another /proc abstraction, presumably your
> > > socinfo string will be fixed regardless of whether it's SMP or not.
> > 
> > Yeah, I wouldn't expect it to change if it SMP or not. It should be fixed.
> > Previous version of this change was actually extending ARM cpuinfo. The previous
> > thread starts here:
> > http://marc.info/?l=linux-omap&m=127304890312365&w=2
> > 
> > But, the point of moving that to specific file was that soc info is not really cpu info.
> > 
> It's up to you of course, but adding an extra file because of SoC/CPU
> ambiguity seems pretty ugly. Almost all architectures already include
> machine type descriptors in their cpuinfo output (as ARM does also) and
> if you can justify that then certainly adding in some SoC-specific bits
> isn't exactly much of a stretch.
> 
> These days you should have a pretty strong justification for adding new
> procfs files, and this is certainly not one of them.

I disagree.
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