linux-kernel - Re: bit fields && data tearing

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Date:	Tue, 15 Jul 2014 08:02:38 -0700
From:	Richard Henderson <rth@...ddle.net>
To:	Peter Hurley <peter@...leysoftware.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Oleg Nesterov <oleg@...hat.com>
CC:	Jakub Jelinek <jakub@...hat.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Miroslav Franc <mfranc@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	Dan <opendtv@...oo.com>
Subject: Re: bit fields && data tearing

On 07/15/2014 06:54 AM, Peter Hurley wrote:
> 
> Jonathan Corbet wrote a LWN article about this back in 2012:
> http://lwn.net/Articles/478657/
> 
> I guess it's fixed in gcc 4.8, but too bad there's not a workaround for
> earlier compilers (akin to -fstrict_volatile_bitfields without requiring
> the volatile keyword)

>>From the gcc pr, it looks like the patch was backported to 4.7.
But we didn't fix it in versions earlier than that.


r~
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