linux-kernel - Re: [PATCH 0/2] jump label: 2.6.38 updates

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Message-ID: <BLU0-SMTP23851725CDB84163CDDE2296D00@phx.gbl>
Date:	Mon, 14 Feb 2011 17:29:58 -0500
From:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Steven Rostedt <rostedt@...dmis.org>,
	David Miller <davem@...emloft.net>, peterz@...radead.org,
	will.newton@...il.com, jbaron@...hat.com, mingo@...e.hu,
	tglx@...utronix.de, andi@...stfloor.org, roland@...hat.com,
	rth@...hat.com, masami.hiramatsu.pt@...achi.com,
	fweisbec@...il.com, avi@...hat.com, sam@...nborg.org,
	ddaney@...iumnetworks.com, michael@...erman.id.au,
	linux-kernel@...r.kernel.org, vapier@...too.org,
	cmetcalf@...era.com, dhowells@...hat.com, schwidefsky@...ibm.com,
	heiko.carstens@...ibm.com, benh@...nel.crashing.org
Subject: Re: [PATCH 0/2] jump label: 2.6.38 updates

* H. Peter Anvin (hpa@...or.com) wrote:
> On 02/14/2011 02:20 PM, Steven Rostedt wrote:
> > 
> > Ideally, we would like a single atomic_read() but due to these wacky
> > archs, it may not be possible.
> > 
> 
> #ifdef ARCH_ATOMIC_READ_SUCKS_EGGS?
> 
> 	-hpa

lol :)

Hrm, I wonder if it might cause problems with combinations of "cmpxchg"
and "read" performed on a variable (without using atomic.h).

Mathieu

> 
> 
> -- 
> H. Peter Anvin, Intel Open Source Technology Center
> I work for Intel.  I don't speak on their behalf.
> 

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
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