linux-kernel - Re: [Xen-devel] [PATCH v4] arm: remove !CPU_V6 and !GENERIC

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Date:	Wed, 22 Jan 2014 09:43:51 +0000
From:	Ian Campbell <Ian.Campbell@...rix.com>
To:	Stefano Stabellini <stefano.stabellini@...citrix.com>
CC:	<will.deacon@....com>, <linux@....linux.org.uk>, <arnd@...db.de>,
	<catalin.marinas@....com>, <jaccon.bastiaansen@...il.com>,
	<linux-kernel@...r.kernel.org>, <xen-devel@...ts.xenproject.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [Xen-devel] [PATCH v4] arm: remove !CPU_V6 and
 !GENERIC_ATOMIC64 build dependencies for XEN

On Tue, 2014-01-21 at 13:44 +0000, Stefano Stabellini wrote:
> Remove !GENERIC_ATOMIC64 build dependency:
> - introduce xen_atomic64_xchg
> - use it to implement xchg_xen_ulong
> 
> Remove !CPU_V6 build dependency:
> - introduce __cmpxchg8 and __cmpxchg16, compiled even ifdef
>   CONFIG_CPU_V6
> - implement sync_cmpxchg using __cmpxchg8 and __cmpxchg16
> 
> Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com>

Acked-by: Ian Campbell <ian.campbell@...rix.com>


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