linux-kernel - Re: [PATCH 6/6] pagemap: introduce data structure for pagemap entry

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Message-Id: <20120209162741.283ecb76.akpm@linux-foundation.org>
Date:	Thu, 9 Feb 2012 16:27:41 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Cc:	linux-mm@...ck.org, David Rientjes <rientjes@...gle.com>,
	Andi Kleen <andi@...stfloor.org>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/6] pagemap: introduce data structure for pagemap entry

On Wed,  8 Feb 2012 10:51:42 -0500
Naoya Horiguchi <n-horiguchi@...jp.nec.com> wrote:

> Currently a local variable of pagemap entry in pagemap_pte_range()
> is named pfn and typed with u64, but it's not correct (pfn should
> be unsigned long.)
> This patch introduces special type for pagemap entry and replace
> code with it.
> 
> Signed-off-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> 
> Changes since v4:
>   - Rename pme_t to pagemap_entry_t

hm.  Why this change?  I'd have thought that this should be called
pme_t.  And defined in or under pgtable.h, rather than being private to
fs/proc/task_mmu.c.
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