mm/page_alloc: factor zone_pageset_init() out of setup_zone_pageset()

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Cc: Gilad Ben-Yossef <gilad@benyossef.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/page_alloc.c

@@ -4104,22 +4104,25 @@ static void setup_pagelist_highmark(struct per_cpu_pageset *p,
 	pageset_update(&p->pcp, high, batch);
 }
 
-static void __meminit setup_zone_pageset(struct zone *zone)
+static void __meminit zone_pageset_init(struct zone *zone, int cpu)
 {
-	int cpu;
-
-	zone->pageset = alloc_percpu(struct per_cpu_pageset);
-
-	for_each_possible_cpu(cpu) {
 	struct per_cpu_pageset *pcp = per_cpu_ptr(zone->pageset, cpu);
 
-		setup_pageset(pcp, zone_batchsize(zone));
-
+	pageset_init(pcp);
 	if (percpu_pagelist_fraction)
 		setup_pagelist_highmark(pcp,
 			(zone->managed_pages /
 				percpu_pagelist_fraction));
-	}
+	else
+		pageset_set_batch(pcp, zone_batchsize(zone));
+}
+
+static void __meminit setup_zone_pageset(struct zone *zone)
+{
+	int cpu;
+	zone->pageset = alloc_percpu(struct per_cpu_pageset);
+	for_each_possible_cpu(cpu)
+		zone_pageset_init(zone, cpu);
 }
 
 /*