Patch
page-allocator-change-migratetype-for-all-pageblocks-within-a-high-order-page-during-__rmqueue_fallback
is meant to change the pageblock ownership of each pageblock within a
given range. This is necessary when the buddy to be split is of higher
order than the pageblock_order. However, the calculation was wrong
leading to crashes on ia-64 and slightly incorrect behaviour on x86.
This patch corrects the calculation.
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>