[PATCH] quieten zone_pcp_init

In zone_pcp_init we print out all zones even if they are empty:

On node 0 totalpages: 245760
  DMA zone: 245760 pages, LIFO batch:31
  DMA32 zone: 0 pages, LIFO batch:0
  Normal zone: 0 pages, LIFO batch:0
  HighMem zone: 0 pages, LIFO batch:0

To conserve dmesg space why not print only the non zero zones.
Signed-off-by: NAnton Blanchard <anton@samba.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

mm/page_alloc.c

@@ -2029,8 +2029,9 @@ static __meminit void zone_pcp_init(struct zone *zone)
 		setup_pageset(zone_pcp(zone,cpu), batch);
 #endif
 	}
-	printk(KERN_DEBUG "  %s zone: %lu pages, LIFO batch:%lu\n",
-		zone->name, zone->present_pages, batch);
+	if (zone->present_pages)
+		printk(KERN_DEBUG "  %s zone: %lu pages, LIFO batch:%lu\n",
+			zone->name, zone->present_pages, batch);
 }
 
 static __meminit void init_currently_empty_zone(struct zone *zone,