[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: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

mm/page_alloc.c

@@ -2029,6 +2029,7 @@ static __meminit void zone_pcp_init(struct zone *zone)
 		setup_pageset(zone_pcp(zone,cpu), batch);
 #endif
 	}
+	if (zone->present_pages)
 		printk(KERN_DEBUG "  %s zone: %lu pages, LIFO batch:%lu\n",
 			zone->name, zone->present_pages, batch);
 }