linux-kernel - [PATCH v3 2/7] fuse: Change remove_from_page

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Message-Id: <a41d3be39d5ecf7549ae7cfb7fc63807fe07a394.1294723009.git.minchan.kim@gmail.com>
Date:	Tue, 11 Jan 2011 14:22:06 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Hugh Dickins <hughd@...gle.com>, Mel Gorman <mel@....ul.ie>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Minchan Kim <minchan.kim@...il.com>,
	Miklos Szeredi <miklos@...redi.hu>,
	fuse-devel@...ts.sourceforge.net
Subject: [PATCH v3 2/7] fuse: Change remove_from_page_cache

This patch series changes remove_from_page_cache's page ref counting
rule. Page cache ref count is decreased in delete_from_page_cache.
So we don't need decreasing page reference by caller.

Cc: Miklos Szeredi <miklos@...redi.hu>
Cc: fuse-devel@...ts.sourceforge.net
Acked-by: Hugh Dickins <hughd@...gle.com>
Acked-by: Mel Gorman <mel@....ul.ie>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Reviewed-by: Johannes Weiner <hannes@...xchg.org>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Signed-off-by: Minchan Kim <minchan.kim@...il.com>
---
 fs/fuse/dev.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index cf8d28d..1ef24fb 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -737,8 +737,7 @@ static int fuse_try_move_page(struct fuse_copy_state *cs, struct page **pagep)
 	if (WARN_ON(PageMlocked(oldpage)))
 		goto out_fallback_unlock;
 
-	remove_from_page_cache(oldpage);
-	page_cache_release(oldpage);
+	delete_from_page_cache(oldpage);
 
 	err = add_to_page_cache_locked(newpage, mapping, index, GFP_KERNEL);
 	if (err) {
-- 
1.7.0.4

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