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    Subject[07/44] mm: fix return value of scan_lru_pages in memory unplug
    2.6.27-stable review patch.  If anyone has any objections, please let us know.

    ------------------

    From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.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@jp.fujitsu.com>
    Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

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

    --- a/mm/memory_hotplug.c
    +++ b/mm/memory_hotplug.c
    @@ -612,7 +612,7 @@ 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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