linux-kernel - Re: [PATCH] x86/microcode_intel_early.c: Get 32-bit physical address by __pa

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Message-Id: <201303201106.GFD65688.JtOFMLFVSQFOOH@I-love.SAKURA.ne.jp>
Date:	Wed, 20 Mar 2013 11:06:11 +0900
From:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:	fenghua.yu@...el.com, hpa@...or.com, mingo@...e.hu,
	tglx@...utronix.de, linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH] x86/microcode_intel_early.c: Get 32-bit physical address by __pa_nodebug()

Fenghua Yu wrote:
> From: Fenghua Yu <fenghua.yu@...el.com>
> 
> In 32-bit, __pa_symbol() in CONFIG_DEBUG_VIRTUAL accesses kernel data (e.g.
> max_low_pfn) that haven't been setup yet in such early boot phase. To fix the
> issue, __pa_nodebug() replaces __pa_symbol() to get a global symbol's physical
> address.
> 
> Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
> ---
>  arch/x86/kernel/microcode_intel_early.c | 26 +++++++++++++-------------
>  1 file changed, 13 insertions(+), 13 deletions(-)
> 
This patch fixes my problem. Thank you.
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