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Subject[PATCH 5/7] truncate: Change remove_from_page_cache
Date
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@oracle.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-mm@kvack.org
Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.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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