[mmotm] mm/page_owner: align with pageblock_nr_pages

[zhong jiang <zhongjiang@huawei.com>]

Currently, init_pages_in_zone walk the zone in pageblock_nr_pages
steps.  MAX_ORDER_NR_PAGES is possible to have holes when
CONFIG_HOLES_IN_ZONE is set. it is likely to be different between
MAX_ORDER_NR_PAGES and pageblock_nr_pages. if we skip the size of
MAX_ORDER_NR_PAGES, it will result in the second 2M memroy leak.

meanwhile, the change will make the code consistent. because the
entire function is based on the pageblock_nr_pages steps.

Signed-off-by: zhong jiang <zhongjiang@huawei.com>
---
 mm/page_owner.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page_owner.c b/mm/page_owner.c
index 60634dc..754efdd 100644
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -527,7 +527,7 @@ static void init_pages_in_zone(pg_data_t *pgdat, struct zone *zone)
 	 */
 	for (; pfn < end_pfn; ) {
 		if (!pfn_valid(pfn)) {
-			pfn = ALIGN(pfn + 1, MAX_ORDER_NR_PAGES);
+			pfn = ALIGN(pfn + 1, pageblock_nr_pages);
 			continue;
 		}
 
-- 
1.8.3.1

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