linux-kernel - Re: [PATCH 1/3] xen: off by one error in xen/setup.c

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Date:	Wed, 03 Aug 2011 07:33:35 +0200
From:	Igor Mammedov <imammedo@...hat.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] xen: off by one error in xen/setup.c

On 08/02/2011 07:07 PM, Konrad Rzeszutek Wilk wrote:
> On Tue, Aug 02, 2011 at 11:45:23AM +0200, Igor Mammedov wrote:
>> Do not try to initialize pfn beyond of available address space.
>>
>> Signed-off-by: Igor Mammedov<imammedo@...hat.com>
>> ---
>>   arch/x86/xen/setup.c |    2 +-
>>   1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
>> index 60aeeb5..2221b05 100644
>> --- a/arch/x86/xen/setup.c
>> +++ b/arch/x86/xen/setup.c
>> @@ -69,7 +69,7 @@ static void __init xen_add_extra_mem(unsigned long pages)
>>
>>   	xen_max_p2m_pfn = PFN_DOWN(extra_start + size);
>>
>> -	for (pfn = PFN_DOWN(extra_start); pfn<= xen_max_p2m_pfn; pfn++)
>> +	for (pfn = PFN_DOWN(extra_start); pfn<  xen_max_p2m_pfn; ++pfn)
>>   		__set_phys_to_machine(pfn, INVALID_P2M_ENTRY);
>
> Did this actually break anything?

Not really, but for the sake of correctness and as cleanup it's good idea.

>
>>   }
>>
>> --
>> 1.7.5
>>
>> --
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-- 
Thanks,
  Igor
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