linux-kernel - Re: [PATCH 4/6] x86: fix some bugs about EFI runtime code mapping

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Message-ID: <20080125091923.GE23708@elte.hu>
Date:	Fri, 25 Jan 2008 10:19:23 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	"Huang, Ying" <ying.huang@...el.com>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>, Andi Kleen <ak@...e.de>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/6] x86: fix some bugs about EFI runtime code mapping


* Jeremy Fitzhardinge <jeremy@...p.org> wrote:

>>  +#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
>> +static void __init runtime_code_page_mkexec(void)
>> +{
>> +	efi_memory_desc_t *md;
>> +	unsigned long end;
>> +	void *p;
>> +
>> +	if (!(__supported_pte_mask & _PAGE_NX))
>> +		return;
>>   
>
> On 32-bit non-PAE, _PAGE_NX == 0, so this if() statement should be 
> sufficient to disable the whole function at compile time without 
> needing the outer #if defined wrapper.

good point. The patch fixes bugs and the consolidation it does is very 
nice so i've applied it already, but we could indeed further consolidate 
it and make it a nice #ifdef-less function. Could one of you send an 
add-on patch for this?

	Ingo
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