linux-kernel - Re: [PATCH] introduce for_each_populated

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Message-ID: <20090210103731.GA1740@cmpxchg.org>
Date:	Tue, 10 Feb 2009 11:37:32 +0100
From:	Johannes Weiner <hannes@...xchg.org>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Mel Gorman <mel@....ul.ie>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] introduce for_each_populated_zone() macro

On Tue, Feb 10, 2009 at 04:39:13PM +0900, KOSAKI Motohiro wrote:
> 
> Impact: cleanup
> 
> In almost case, for_each_zone() is used with populated_zone().
> It's because almost function doesn't need memoryless node information.
> Therefore, for_each_populated_zone() can help to make code simplify.
> 
> This patch doesn't have any functional change.
> 
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> Cc: Mel Gorman <mel@....ul.ie>
> ---
>  include/linux/mmzone.h  |   11 +++++++++++
>  kernel/power/snapshot.c |    9 +++------
>  kernel/power/swsusp.c   |   17 ++++++++---------
>  mm/page_alloc.c         |   26 +++++---------------------
>  mm/vmscan.c             |    6 +-----
>  mm/vmstat.c             |   11 ++---------
>  6 files changed, 30 insertions(+), 50 deletions(-)

Nice!

Reviewed-by: Johannes Weiner <hannes@...xchg.org>
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