linux-kernel - Re: [PATCH 1/9] um: disable CMPXCHG

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Message-ID: <alpine.DEB.2.00.1108291235180.16005@router.home>
Date:	Mon, 29 Aug 2011 12:35:41 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Richard Weinberger <richard@....at>
cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net,
	Thadeu Lima de Souza Cascardo <cascardo@...oscopio.com>,
	Jeff Dike <jdike@...toit.com>
Subject: Re: [PATCH 1/9] um: disable CMPXCHG_DOUBLE as it breaks UML build

On Mon, 29 Aug 2011, Richard Weinberger wrote:

> Commit b789ef518b2a7231b0668c813f677cee528a9d3f tests for cmpxchg_double
> support in the SLUB code and it breaks UML builds with SLUB. Since UML
> does not support checking for CPU features, disable CMPXCHG_DOUBLE just
> like CMPXCHG_LOCAL is disabled for UML.

Reviewed-by: Christoph Lameter <cl@...ux.com>
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