linux-kernel - Re: [tip:x86/urgent] x86: add boundary check for 32bit res before expand e820 resource to alignment

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Message-ID: <4A4DACB4.5040207@kernel.org>
Date:	Fri, 03 Jul 2009 00:01:08 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	linux-kernel@...r.kernel.org, mingo@...hat.com, hpa@...or.com,
	tglx@...utronix.de, mikpe@...uu.se, alex.shi@...el.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/urgent] x86: add boundary check for 32bit res before
 expand e820 resource to alignment

Ingo Molnar wrote:
> * tip-bot for Yinghai Lu <yinghai@...nel.org> wrote:
> 
>> Commit-ID:  4b05c392955458757790414bd7ba4280e1a515b0
>> Gitweb:     http://git.kernel.org/tip/4b05c392955458757790414bd7ba4280e1a515b0
>> Author:     Yinghai Lu <yinghai@...nel.org>
>> AuthorDate: Thu, 2 Jul 2009 11:10:56 -0700
>> Committer:  H. Peter Anvin <hpa@...or.com>
>> CommitDate: Thu, 2 Jul 2009 11:53:15 -0700
>>
>> x86: add boundary check for 32bit res before expand e820 resource to alignment
>>
>> Avoid incorrect address arithmetic, ascerbated by previous improper
>> definition of the round_up() macro.
>>
>> fix hang with HIGHMEM_64G and 32bit resource.
>> according to hpa and Linus, use (resource_size_t)-1 to fend off big ranges.
>> analyized by hpa
>>
>> Alex found:
>> for i386 machine the specjbb2005 still can not run with hugepage
>>
>> -v2: it also fix hugepage problem
>>
>> Reported-and-tested-by: Mikael Pettersson <mikpe@...uu.se>
>> Reported-and-Tested-by: Alex Shi <alex.shi@...el.com>
>> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
>> Signed-off-by: H. Peter Anvin <hpa@...or.com>
> 
> Peter, Yinghi - i zapped this and the other e820 patch from 
> x86/urgent as Linus already applied slightly different versions 
> upstream:
> 
> 7c5371c: x86: add boundary check for 32bit res before expand e820 resource to alignment

the same, only comments is different.

> 4364467: x86: fix power-of-2 round_up/round_down macros
more safe.

do we need to move it include/linux/kernel.h ?

YH


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