linux-kernel - Re: [PATCH 2/4, v2] x86: enlightenment for ticket spin locks

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Message-ID: <1277885135.1868.72.camel@laptop>
Date:	Wed, 30 Jun 2010 10:05:35 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Jan Beulich <JBeulich@...ell.com>
Cc:	mingo@...e.hu, tglx@...utronix.de, hpa@...or.com,
	jeremy.fitzhardinge@...rix.com,
	Ky Srinivasan <KSrinivasan@...ell.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4, v2] x86: enlightenment for ticket spin locks - Xen
 implementation

On Tue, 2010-06-29 at 15:32 +0100, Jan Beulich wrote:
> +static DEFINE_PER_CPU(arch_rwlock_t, spinning_rm_lock) = __ARCH_RW_LOCK_UNLOCKED;

why is that an arch_ lock?
why is that a rwlock?, those things are useless.
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