linux-kernel - [PATCH 5/7] truncate: Change remove_from_page

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Message-Id: <fdafb3fb6ed32ec96f945fdbdd42bd6492d00cd7.1293031047.git.minchan.kim@gmail.com>
Date:	Thu, 23 Dec 2010 00:32:47 +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>,
	Minchan Kim <minchan.kim@...il.com>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	Andi Kleen <andi@...stfloor.org>,
	Nick Piggin <npiggin@...nel.dk>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: [PATCH 5/7] truncate: 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: Dan Magenheimer <dan.magenheimer@...cle.com>
Cc: Andi Kleen <andi@...stfloor.org>
Cc: Nick Piggin <npiggin@...nel.dk>
Cc: Al Viro <viro@...iv.linux.org.uk>
Cc: linux-mm@...ck.org
Signed-off-by: Minchan Kim <minchan.kim@...il.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
---
 mm/truncate.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/mm/truncate.c b/mm/truncate.c
index 9ee5673..3adb9c0 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -108,13 +108,12 @@ truncate_complete_page(struct address_space *mapping, struct page *page)
 	cancel_dirty_page(page, PAGE_CACHE_SIZE);
 
 	clear_page_mlock(page);
-	remove_from_page_cache(page);
+	delete_from_page_cache(page);
 	ClearPageMappedToDisk(page);
 	/* this must be after the remove_from_page_cache which
 	 * calls cleancache_put_page (and note page->mapping is now NULL)
 	 */
 	cleancache_flush_page(mapping, page);
-	page_cache_release(page);	/* pagecache ref */
 	return 0;
 }
 
-- 
1.7.0.4

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