linux-kernel - Re: [PATCH 2/5] ACPI, APEI, Fix acpi_pre

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Message-ID: <20100921124746.GF18991@one.firstfloor.org>
Date:	Tue, 21 Sep 2010 14:47:46 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Huang Ying <ying.huang@...el.com>
Cc:	Len Brown <lenb@...nel.org>, linux-kernel@...r.kernel.org,
	Andi Kleen <andi@...stfloor.org>, linux-acpi@...r.kernel.org,
	Jin Dongming <jin.dongming@...css.fujitsu.com>
Subject: Re: [PATCH 2/5] ACPI, APEI, Fix acpi_pre_map() return value

On Sun, Sep 19, 2010 at 11:00:32AM +0800, Huang Ying wrote:
> From: Jin Dongming <jin.dongming@...css.fujitsu.com>
> 
> After we ioremap() a new region, we call __acpi_try_ioremap() to
> see whether another thread has already mapped the same region.
> This check clobbers "vaddr",  so compute the return value of
> acpi_pre_map() using the ioremap() result "map->vaddr" instead.
> 
> v2:
>     Modified the unsuitable description of patch.
> 
> v3:
>     Removed unlikely() check and made description simpler.

Reviewed-by: Andi Kleen <ak@...ux.intel.com>

-Andi
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