Re: bit fields && data tearing
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- To: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
- Subject: Re: bit fields && data tearing
- From: Jakub Jelinek <jakub@xxxxxxxxxx>
- Date: Thu, 4 Sep 2014 14:29:01 +0200
- Cc: Mikael Pettersson <mikpelinux@xxxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>, Richard Henderson <rth@xxxxxxxxxxx>, Oleg Nesterov <oleg@xxxxxxxxxx>, Miroslav Franc <mfranc@xxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, Tony Luck <tony.luck@xxxxxxxxx>, linux-ia64@xxxxxxxxxxxxxxx
- In-reply-to: <540859EC.5000407@hurleysoftware.com>
- List-id: <linux-ia64.vger.kernel.org>
- References: <20140712181328.GA8738@redhat.com> <54079B70.4050200@hurleysoftware.com> <1409785893.30640.118.camel@pasglop> <21512.10628.412205.873477@gargle.gargle.HOWL> <20140904090952.GW17454@tucnak.redhat.com> <540859EC.5000407@hurleysoftware.com>
- Reply-to: Jakub Jelinek <jakub@xxxxxxxxxx>
- User-agent: Mutt/1.5.23 (2014-03-12)
On Thu, Sep 04, 2014 at 08:24:12AM -0400, Peter Hurley wrote:
> And I just confirmed with the Alpha cross-compiler that the fields are
> not 'padded out' if volatile either.
They can't be, struct layout is part of the ABI.
Guess you can introduce say atomic_bool and similar typedefs which would be
bool or char on most arches and on alpha int.
Jakub
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