linux-kernel - Re: [PATCH] x86 headers: include linux/types.h

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Date:	Fri, 13 Feb 2009 19:09:24 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86 headers: include linux/types.h


* Jeremy Fitzhardinge <jeremy@...p.org> wrote:

> Ingo Molnar wrote:
>> Regarding the fixlet below - wouldnt PTE_FLAGS_MASK be better placed in
>> pgtable_types.h ? It's specifically related to the pte format. OTOH we
>> have a lot of PTE details in the page_*types.h files already.
>>   
>
> No, you're right.
>
>> The boundary between page_types.h and pgtable_types.h does not seem to
>> be clear to me - what is the principle you followed?
>>   
>
> Well, basically anything to do with the internals of a pte*_t go in  
> pgtable.h.  PTE_*_MASK should go there too, and is an oversight (though  
> its on the margin because of its dependency on the page size/mask  
> definitions in page*.h).

likewise, PUD_PAGE_* and PAGETABLE_LEVELS should move to pgtable_types.h
too i guess. Same goes for *MASK_SHIFT*.

	Ingo
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