Re: [crash] Re: Latest brk patchset

[Yinghai Lu]

H. Peter Anvin wrote:
> Jeremy Fitzhardinge wrote:
>> H. Peter Anvin wrote:
>>> Or simplified:
>>>
>>> PAGE_TABLE_SIZE(((1 << 32)-PAGE_OFFSET) >> PAGE_SHIFT) << PAGE_SHIFT
>>
>> Was worried about 1<<32 overflowing.  Never really sure what gas's
>> type system is.
>>
> 
> It's bignum-based.
> 
> 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?

YH
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