Merge "mm/compaction.c: correct zone boundary handling when resetting pageblock skip hints"

							bool check_target)

{

	struct page *page = pfn_to_online_page(pfn);

	struct page *block_page;

	struct page *end_page;

	unsigned long block_pfn;

	    get_pageblock_migratetype(page) != MIGRATE_MOVABLE)

		return false;

	/* Ensure the start of the pageblock or zone is online and valid */

	block_pfn = pageblock_start_pfn(pfn);

	block_page = pfn_to_online_page(max(block_pfn, zone->zone_start_pfn));

	if (block_page) {

		page = block_page;

		pfn = block_pfn;

	}

	/* Ensure the end of the pageblock or zone is online and valid */

	block_pfn += pageblock_nr_pages;

	block_pfn = min(block_pfn, zone_end_pfn(zone) - 1);

	end_page = pfn_to_online_page(block_pfn);

	if (!end_page)

		return false;

	/*

	 * Only clear the hint if a sample indicates there is either a

	 * free page or an LRU page in the block. One or other condition

	 * is necessary for the block to be a migration source/target.

	 */

	block_pfn = pageblock_start_pfn(pfn);

	pfn = max(block_pfn, zone->zone_start_pfn);

	page = pfn_to_page(pfn);

	if (zone != page_zone(page))

		return false;

	pfn = block_pfn + pageblock_nr_pages;

	pfn = min(pfn, zone_end_pfn(zone));

	end_page = pfn_to_page(pfn);

	do {

		if (pfn_valid_within(pfn)) {

			if (check_source && PageLRU(page)) {

static void __reset_isolation_suitable(struct zone *zone)

{

	unsigned long migrate_pfn = zone->zone_start_pfn;

	unsigned long free_pfn = zone_end_pfn(zone);

	unsigned long free_pfn = zone_end_pfn(zone) - 1;

	unsigned long reset_migrate = free_pfn;

	unsigned long reset_free = migrate_pfn;

	bool source_set = false;