linux-kernel - Re: [PATCH] Fix left over EFI cache mapping problems

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Date:	Mon, 18 Feb 2008 15:05:46 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	"Huang, Ying" <ying.huang@...el.com>, torvalds@...l.org,
	tglx@...utronix.de, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix left over EFI cache mapping problems


* Andi Kleen <andi@...stfloor.org> wrote:

> > UEFI specification 2.1 (section 6.2, page 124) that the 
> > NumberOfPages (num_pages) of EFI_MEMORY_DESCRIPTOR 
> > (efi_memory_desc_t) must be "Number of 4KB pages in the memory 
> > region". So we need not worry about potential EFI_PAGE_SHIFT 
> > changes.
> 
> Then it would be cleaner to just use PAGE_SIZE in the x86 specific EFI 
> code imho.

(as i suggested in the mail Ying replied to.)

But ... as long as ia64 uses EFI too i dont mind if it's using 
EFI_PAGE_SHIFT consistently, even in the arch/x86-only files.

	Ingo
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