From: Andi Kleen <andi@firstfloor.org>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: "Brown, Len" <len.brown@intel.com>,
Yinghai Lu <yinghai@kernel.org>,
linux-acpi@vger.kernel.org, Ingo Molnar <mingo@elte.hu>
Subject: Re: state of some x86 acpi patches
Date: Thu, 18 Dec 2008 14:44:49 +0100 [thread overview]
Message-ID: <874p111tta.fsf@basil.nowhere.org> (raw)
In-Reply-To: <4947FF4C.80706@goop.org> (Jeremy Fitzhardinge's message of "Tue, 16 Dec 2008 11:19:40 -0800")
Jeremy Fitzhardinge <jeremy@goop.org> writes:
>
> However, unlike early_ioremap(), __acpi_map_table just maintains a
> single mapping which gets replaced each call, and has no corresponding
> unmap function. Implement this by just removing the previous mapping
> each time its called. Unfortunately, this will leave a stray mapping
> at the end.
Stray mappings are dangerous. They can lead to illegal cache aliases
later. Better avoid them.
I guess ACPI could call a cleanup function after it's done with
all early mappings.
-Andi
--
ak@linux.intel.com
next prev parent reply other threads:[~2008-12-18 13:44 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-16 19:19 state of some x86 acpi patches Jeremy Fitzhardinge
2008-12-16 19:25 ` Ingo Molnar
2008-12-31 23:38 ` Len Brown
2009-01-01 6:49 ` Jeremy Fitzhardinge
2009-01-02 15:39 ` Ingo Molnar
2009-01-02 22:28 ` Len Brown
2009-01-28 23:45 ` Jeremy Fitzhardinge
2009-01-29 1:10 ` Yinghai Lu
2009-02-07 2:58 ` Jeremy Fitzhardinge
2009-02-07 3:18 ` Yinghai Lu
2009-02-08 0:09 ` Jeremy Fitzhardinge
2009-02-09 12:37 ` Ingo Molnar
2008-12-18 13:44 ` Andi Kleen [this message]
2008-12-18 19:46 ` Jeremy Fitzhardinge
2008-12-18 21:47 ` Ingo Molnar
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