linux-kernel - Re: [PATCH 2/3] mm: thp: Fix the update_mmu_cache() last argument passing in mm/huge

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Message-Id: <20120920.153212.297605753294494829.davem@davemloft.net>
Date:	Thu, 20 Sep 2012 15:32:12 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	will.deacon@....com
Cc:	ralf@...ux-mips.org, Catalin.Marinas@....com,
	akpm@...ux-foundation.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	mhocko@...e.cz, Steve.Capper@....com
Subject: Re: [PATCH 2/3] mm: thp: Fix the update_mmu_cache() last argument
 passing in mm/huge_memory.c

From: Will Deacon <will.deacon@....com>
Date: Thu, 20 Sep 2012 13:44:01 +0100

> Just to clarify: do you want a cast from pmd_t * to pte_t * or instead copy
> the hugetlb code and pass ptes around instead of pmds? The latter is pretty
> invasive...

But will be necessary for SPARC64 and POWERPC where the hugetlb
entries are encoded at the PTE level.
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