linux-kernel - Re: [PATCH] "volatile considered harmful", take 3

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Message-ID: <20070512115151.GB10873@zakalwe.fi>
Date:	Sat, 12 May 2007 14:51:51 +0300
From:	Heikki Orsila <shdl@...alwe.fi>
To:	Stefan Richter <stefanr@...6.in-berlin.de>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Satyam Sharma <satyam.sharma@...il.com>,
	Jonathan Corbet <corbet@....net>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, Johannes Stezenbach <js@...uxtv.org>,
	Jesper Juhl <jesper.juhl@...il.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	jimmy bahuleyan <knight.camelot@...il.com>
Subject: Re: [PATCH] "volatile considered harmful", take 3

On Sat, May 12, 2007 at 09:53:03AM +0200, Stefan Richter wrote:
> H. Peter Anvin wrote:
> [slightly off topic: GCCisms in Linux kernel]
> > It contains *many* constructs that are not defined in, for
> > example, C99, and it would in fact be impossible to write the Linux
> > kernel using only C99-compliant constructs.
> 
> True.  On the other hand, it is possible to keep large parts of the
> kernel independent of compiler implementation details.  And it is not
> only possible but also beneficial, e.g. because the compiler's
> implementation changes over time.

I think the most important reason for portable code is that new readers 
are more familiar with effects of the code.

-- 
Heikki Orsila			Barbie's law:
heikki.orsila@....fi		"Math is hard, let's go shopping!"
http://www.iki.fi/shd
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