linux-kernel - Re: [crash] Re: Latest brk patchset

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Message-ID: <49BF301C.6010708@goop.org>
Date:	Mon, 16 Mar 2009 22:07:40 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Yinghai Lu <yinghai@...nel.org>, Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [crash] Re: Latest brk patchset

H. Peter Anvin wrote:
> Yinghai Lu wrote:
>   
>>> You could also write:
>>>
>>> PAGE_TABLE_SIZE((-PAGE_OFFSET & 0xffffffff) >> PAGE_SHIFT) << PAGE_SHIFT
>>>
>>> (the & 0xffffffff is necessary, or you'll get a signed shift.)
>>>       
>> max kernel address space range?
>>
>>     
>
> Yes, either ((1 << 32)-PAGE_OFFSET) or (-PAGE_OFFSET & 0xffffffff)
> should work for that.
>   

The former seems more obvious.

    J
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