vmscan: remove unnecessary temporary vars in do_try_to_free_pages

Remove temporary variable that is only used once and does not help clarify
code.

[[email protected]: coding-style fixes]
Signed-off-by: Mel Gorman <[email protected]>
Reviewed-by: Rik van Riel <[email protected]>
Cc: Dave Chinner <[email protected]>
Cc: Chris Mason <[email protected]>
Cc: Nick Piggin <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: KAMEZAWA Hiroyuki <[email protected]>
Cc: KOSAKI Motohiro <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: Michael Rubin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

mm/vmscan.c

@@ -1728,13 +1728,12 @@ static void shrink_zone(int priority, struct zone *zone,
 static bool shrink_zones(int priority, struct zonelist *zonelist,
 					struct scan_control *sc)
 {
-	enum zone_type high_zoneidx = gfp_zone(sc->gfp_mask);
 	struct zoneref *z;
 	struct zone *zone;
 	bool all_unreclaimable = true;
 
-	for_each_zone_zonelist_nodemask(zone, z, zonelist, high_zoneidx,
-					sc->nodemask) {
+	for_each_zone_zonelist_nodemask(zone, z, zonelist,
+					gfp_zone(sc->gfp_mask), sc->nodemask) {
 		if (!populated_zone(zone))
 			continue;
 		/*
@@ -1779,7 +1778,6 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
 	struct reclaim_state *reclaim_state = current->reclaim_state;
 	struct zoneref *z;
 	struct zone *zone;
-	enum zone_type high_zoneidx = gfp_zone(sc->gfp_mask);
 	unsigned long writeback_threshold;
 
 	get_mems_allowed();
@@ -1799,7 +1797,8 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
 		 */
 		if (scanning_global_lru(sc)) {
 			unsigned long lru_pages = 0;
-			for_each_zone_zonelist(zone, z, zonelist, high_zoneidx) {
+			for_each_zone_zonelist(zone, z, zonelist,
+					gfp_zone(sc->gfp_mask)) {
 				if (!cpuset_zone_allowed_hardwall(zone, GFP_KERNEL))
 					continue;