mm/page_alloc: factor setup_pageset() into pageset_init() and pageset_set_batch()

Signed-off-by: NCody 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: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

mm/page_alloc.c

@@ -4071,7 +4071,7 @@ static void pageset_set_batch(struct per_cpu_pageset *p, unsigned long batch)
 	pageset_update(&p->pcp, 6 * batch, max(1UL, 1 * batch));
 }
 
-static void setup_pageset(struct per_cpu_pageset *p, unsigned long batch)
+static void pageset_init(struct per_cpu_pageset *p)
 {
 	struct per_cpu_pages *pcp;
 	int migratetype;
@@ -4080,11 +4080,16 @@ static void setup_pageset(struct per_cpu_pageset *p, unsigned long batch)
 
 	pcp = &p->pcp;
 	pcp->count = 0;
-	pageset_set_batch(p, batch);
 	for (migratetype = 0; migratetype < MIGRATE_PCPTYPES; migratetype++)
 		INIT_LIST_HEAD(&pcp->lists[migratetype]);
 }
 
+static void setup_pageset(struct per_cpu_pageset *p, unsigned long batch)
+{
+	pageset_init(p);
+	pageset_set_batch(p, batch);
+}
+
 /*
  * setup_pagelist_highmark() sets the high water mark for hot per_cpu_pagelist
  * to the value high for the pageset p.