Merge "mm: memory_hotplug: wait on device_hotplug_lock in OOM path"

	struct zone *zone = &NODE_DATA(nid)->node_zones[ZONE_MOVABLE];

	unsigned long zone_start, zone_size;

	bool onlined_block = false;

	int ret = lock_device_hotplug_sysfs();

	if (ret)

		return false;

	lock_device_hotplug();

	zone_start = PFN_PHYS(zone->zone_start_pfn);

	zone_size = zone->spanned_pages << PAGE_SHIFT;