linux-kernel - Re: [PATCH v3 3/10] x86/asm: Fix pud/pmd interfaces to handle large PAT bit

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Date:	Tue, 25 Aug 2015 10:16:33 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Toshi Kani <toshi.kani@...com>
cc:	hpa@...or.com, mingo@...hat.com, akpm@...ux-foundation.org,
	bp@...en8.de, linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	x86@...nel.org, jgross@...e.com, konrad.wilk@...cle.com,
	elliott@...com
Subject: Re: [PATCH v3 3/10] x86/asm: Fix pud/pmd interfaces to handle large
 PAT bit

On Wed, 5 Aug 2015, Toshi Kani wrote:

> The PAT bit gets relocated to bit 12 when PUD and PMD mappings are
> used.  This bit 12, however, is not covered by PTE_FLAGS_MASK, which
> is corrently used for masking pfn and flags for all cases.
> 
> Fix pud/pmd interfaces to handle pfn and flags properly by using
> P?D_PAGE_MASK when PUD/PMD mappings are used, i.e. PSE bit is set.

Can you please split that into a patch introducing and describing the
new mask helper functions and a second one making use of it?

Thanks,

	tglx
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