linux-kernel - Re: [PATCH] fix minor error about efi memory

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Message-ID: <453C58AA.6070307@linux.intel.com>
Date:	Mon, 23 Oct 2006 13:52:42 +0800
From:	"bibo,mao" <bibo_mao@...ux.intel.com>
To:	Andrew Morton <akpm@...l.org>
CC:	"bibo,mao" <bibo.mao@...el.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fix minor error about efi memory_present

Andrew Morton wrote:
> On Mon, 23 Oct 2006 11:42:33 +0800
> "bibo,mao" <bibo.mao@...el.com> wrote:
> 
>> Hi, 
>>    Function efi_memory_present_wrapper parameter start/end is physical address,
>> but function memory_present parameter is PFN, this patch converts physical
>> address to PFN.
>>
>>   Signed-off-by: bibo, mao <bibo.mao@...el.com>
>>
>> thanks
>> bibo,mao
>>
>> diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
>> index 519e63c..141041d 100644
>> --- a/arch/i386/kernel/setup.c
>> +++ b/arch/i386/kernel/setup.c
>> @@ -846,7 +846,7 @@ efi_find_max_pfn(unsigned long start, un
>>  static int __init
>>  efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg)
>>  {
>> -	memory_present(0, start, end);
>> +	memory_present(0, PFN_UP(start), PFN_DOWN(end));
>>  	return 0;
>>  }
>>  
> 
> It doesn't _seem_ like a "minor error".  How come people's machines haven't
> been crashing all over the place?
This patch is only efi bios relative, most machines in the market are
legacy bios. System only crashes when booting from EFI bios.

thanks
bibo,mao
> 
> -
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