linux-kernel - Re: [PATCH] Fix kunmap_atomic's use of kpte_clear

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Message-ID: <455127E3.1050301@vmware.com>
Date:	Tue, 07 Nov 2006 16:42:11 -0800
From:	Zachary Amsden <zach@...are.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Andrew Morton <akpm@...l.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Fix kunmap_atomic's use of kpte_clear_flush()

Jeremy Fitzhardinge wrote:
> kunmap_atomic() will call kpte_clear_flush with vaddr/ptep arguments
> which don't correspond if the vaddr is just a normal lowmem address
> (ie, not in the KMAP area).  This patch makes sure that the pte is
> only cleared if kmap area was actually used for the mapping.
>
> Signed-off-by: Jeremy Fitzhardinge <jeremy@...source.com>
> Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
> Cc: Zachary Amsden <zach@...are.com>

Ack.
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