netdev - Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures

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Message-ID: <alpine.LFD.0.999.0708152244310.16414@enigma.security.iitk.ac.in>
Date:	Wed, 15 Aug 2007 22:48:28 +0530 (IST)
From:	Satyam Sharma <satyam@...radead.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
cc:	Herbert Xu <herbert@...dor.apana.org.au>,
	Stefan Richter <stefanr@...6.in-berlin.de>,
	Christoph Lameter <clameter@....com>,
	Chris Snook <csnook@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-arch@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	netdev@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>,
	ak@...e.de, heiko.carstens@...ibm.com, davem@...emloft.net,
	schwidefsky@...ibm.com, wensong@...ux-vs.org, horms@...ge.net.au,
	wjiang@...ilience.com, cfriesen@...tel.com, zlynx@....org,
	rpjday@...dspring.com, jesper.juhl@...il.com,
	segher@...nel.crashing.org
Subject: Re: [PATCH 0/24] make atomic_read() behave consistently across all
 architectures



On Wed, 15 Aug 2007, Paul E. McKenney wrote:

> On Wed, Aug 15, 2007 at 11:33:36PM +0800, Herbert Xu wrote:
> > On Wed, Aug 15, 2007 at 07:25:16AM -0700, Paul E. McKenney wrote:
> > > 
> > > Do we really need another set of APIs?  Can you give even one example
> > > where the pre-existing volatile semantics are causing enough of a problem
> > > to justify adding yet more atomic_*() APIs?
> > 
> > Let's turn this around.  Can you give a single example where
> > the volatile semantics is needed in a legitimate way?
> 
> Sorry, but you are the one advocating for the change.

Not for i386 and x86_64 -- those have atomic ops without any "volatile"
semantics (currently as per existing definitions).
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