linux-kernel - [PATCH] [71/223] mm: fix return value of scan_lru

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Date:	Mon, 13 Dec 2010 00:46:09 +0100 (CET)
From:	Andi Kleen <andi@...stfloor.org>
To:	kamezawa.hiroyu@...fujitsu.com, ak@...ux.intel.com,
	kosaki.motohiro@...fujitsu.com, akpm@...ux-foundation.org,
	torvalds@...ux-foundation.org, gregkh@...e.de,
	linux-kernel@...r.kernel.org, stable@...nel.org
Subject: [PATCH] [71/223] mm: fix return value of scan_lru_pages in memory unplug

2.6.35-longterm review patch.  If anyone has any objections, please let me know.

------------------
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

commit f8f72ad5396987e05a42cf7eff826fb2a15ff148 upstream.

scan_lru_pages returns pfn. So, it's type should be "unsigned long"
not "int".

Note: I guess this has been work until now because memory hotplug tester's
      machine has not very big memory....
      physical address < 32bit << PAGE_SHIFT.

Reported-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Signed-off-by: Andi Kleen <ak@...ux.intel.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 mm/memory_hotplug.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux/mm/memory_hotplug.c
===================================================================
--- linux.orig/mm/memory_hotplug.c
+++ linux/mm/memory_hotplug.c
@@ -659,7 +659,7 @@ static int test_pages_in_a_zone(unsigned
  * Scanning pfn is much easier than scanning lru list.
  * Scan pfn from start to end and Find LRU page.
  */
-int scan_lru_pages(unsigned long start, unsigned long end)
+unsigned long scan_lru_pages(unsigned long start, unsigned long end)
 {
 	unsigned long pfn;
 	struct page *page;
--
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