/* We are about to scan this zone at a certain priority level. If that priority level is smaller (ie: more urgent) than the previous priority, then note that priority level within the zone. This is done so that when the next process comes in to scan this zone, it will immediately start out at this priority level rather than having to build up its own scanning priority. Here, this priority affects only the reclaim-mapped threshold.  */
static void note_zone_scanning_priority(struct zone *zone, int priority)
/* We are about to scan this zone at a certain priority level. If that priority level is smaller (ie: more urgent) than the previous priority, then note that priority level within the zone. This is done so that when the next process comes in to scan this zone, it will immediately start out at this priority level rather than having to build up its own scanning priority. Here, this priority affects only the reclaim-mapped threshold.  */
static void note_zone_scanning_priority(struct zone *zone, int priority)
{
	if (priority < zone->prev_priority)
		zone->prev_priority = priority;
}