linux-kernel - Re: [PATCH] hugepage: support ZERO

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Message-Id: <1220376468.31378.25.camel@localhost.localdomain>
Date:	Tue, 02 Sep 2008 12:27:48 -0500
From:	Adam Litke <agl@...ibm.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	Hugh Dickins <hugh@...itas.com>,
	Kawai Hidehiro <hidehiro.kawai.ez@...achi.com>,
	William Irwin <wli@...omorphy.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>
Subject: Re: [PATCH] hugepage: support ZERO_PAGE()

On Tue, 2008-09-02 at 10:21 +0900, KOSAKI Motohiro wrote:
> +static int huge_zeropage_ok(pte_t *ptep, int write, int shared)
> +{
> +	if (!ptep)
> +		return 0;
> +
> +	if (write)
> +		return 0;
> +
> +	if (shared)
> +		return 0;
> +
> +	return huge_pte_none(huge_ptep_get(ptep));
> +}

In addition to the comments from Mel, I'd like to see this function
collapsed a bit...

if (!ptep || write || shared)
	return 0;
else
	return huge_pte_none(huge_ptep_get(ptep));

-- 
Adam Litke - (agl at us.ibm.com)
IBM Linux Technology Center

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