linux-kernel - Re: [PATCH 2/5] arch/x86/kernel/head_32.S Warning: shift count out of range (32 is not between 0 and 31)

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Message-ID: <4BA3FE2D.6070301@googlemail.com>
Date:	Fri, 19 Mar 2010 23:43:57 +0100
From:	René Bolldorf <xsecute@...glemail.com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] arch/x86/kernel/head_32.S Warning: shift count out
 of range (32 is not between 0 and 31)

On 03/19/10 22:45, H. Peter Anvin wrote:
> On 03/18/2010 03:08 PM, Ren� Bolldorf wrote:
>> Signed-off-by: Rene Bolldorf<xsecute@...glemail.com>
>>
>> diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
>> index 37c3d4b..8bfba5e 100644
>> --- a/arch/x86/kernel/head_32.S
>> +++ b/arch/x86/kernel/head_32.S
>> @@ -62,7 +62,7 @@
>>
>>    /* Enough space to fit pagetables for the low memory linear map */
>>    MAPPING_BEYOND_END = \
>> -	PAGE_TABLE_SIZE(((1<<32) - __PAGE_OFFSET)>>  PAGE_SHIFT)<<  PAGE_SHIFT
>> +	PAGE_TABLE_SIZE(((1<<31) - __PAGE_OFFSET)>>  PAGE_SHIFT)<<  PAGE_SHIFT
>>
>>    /*
>>     * Worst-case size of the kernel mapping we need to make:
>
> NAK... this is in fact doubly wrong... the assembler handles this case
> just fine -- it's a .S file after all -- and the result is wrong.
>
> If you want to change it change it to 0x100000000.
>
> 	-hpa

Thank you, i try it out.
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