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Message-ID: <Pine.LNX.4.64.0709212039220.5752@blonde.wat.veritas.com>
Date:	Fri, 21 Sep 2007 20:42:52 +0100 (BST)
From:	Hugh Dickins <hugh@...itas.com>
To:	Slava Abramov <slava.abramov@....com>
cc:	linux-kernel@...r.kernel.org
Subject: Re: ptep_test_and_clear_young() i386 vs. x86_64 

On Fri, 21 Sep 2007, Slava Abramov wrote:
> 
> Is there any special reason why ptep_test_and_clear_young()
> implementation for x86_64 does not call pte_update()?

Because the i386 pte_update is there for CONFIG_PARAVIRT (and
a no-op without it), and CONFIG_PARAVIRT is so far peculiar to
i386: x86_64 doesn't even define a pte_update to call there.

Hugh
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