From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ian.campbell@citrix.com>
Subject: Re: [PATCHv2 3/6] xen: generic xadd() for ticket locks
Date: Wed, 15 Apr 2015 09:34:19 +0100
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To: David Vrabel <david.vrabel@citrix.com>
Cc: xen-devel@lists.xenproject.org, Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Keir Fraser <keir@xen.org>, Jan Beulich <jbeulich@suse.com>, Tim Deegan <tim@xen.org>
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On Tue, 2015-04-14 at 17:37 +0100, David Vrabel wrote:
> On 14/04/15 14:17, Ian Campbell wrote:
> > On Fri, 2015-04-10 at 15:19 +0100, David Vrabel wrote:
> >> This is only temporary until arm/arm64 provides an xadd()
> >> implementation.
> > 
> > I'll assume that you aren't planning on doing this and add it to my own
> > TODO list. Although, I'm more than willing to be preempted by another
> > ARM dev...
> 
> Thanks.  I'd hoped I could lift something from Linux but there's nothing
> directly suited.

I looked too and didn't find anything suitable. It should be pretty
trivial using ldrex and friends, I've added it to my list.

Ian.