[PATCH] balance_pdgat() cleanup

Despaghettify balance_pdgat() a bit.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

mm/vmscan.c

@@ -1172,11 +1172,12 @@ loop_again:
 			if (!zone_watermark_ok(zone, order, zone->pages_high,
 					       0, 0)) {
 				end_zone = i;
-				goto scan;
+				break;
 			}
 		}
+		if (i < 0)
 			goto out;
-scan:
+
 		for (i = 0; i <= end_zone; i++) {
 			struct zone *zone = pgdat->node_zones + i;