memcg: convert to use zone_to_nid() from bare zone->zone_pgdat->node_id

We have zone_to_nid().  this patch convert all existing users of
zone->zone_pgdat->node_id.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Nishimura Daisuke <d-nishimura@mtf.biglobe.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 5e95996ddfb1..3eed583895a6 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -919,7 +919,7 @@ unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
                                        struct zone *zone,
                                        enum lru_list lru)
 {
-        int nid = zone->zone_pgdat->node_id;
+        int nid = zone_to_nid(zone);
         int zid = zone_idx(zone);
         struct mem_cgroup_per_zone *mz = mem_cgroup_zoneinfo(memcg, nid, zid);
 
@@ -929,7 +929,7 @@ unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
 struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
                                                       struct zone *zone)
 {
-        int nid = zone->zone_pgdat->node_id;
+        int nid = zone_to_nid(zone);
         int zid = zone_idx(zone);
         struct mem_cgroup_per_zone *mz = mem_cgroup_zoneinfo(memcg, nid, zid);
 
@@ -974,7 +974,7 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
         LIST_HEAD(pc_list);
         struct list_head *src;
         struct page_cgroup *pc, *tmp;
-        int nid = z->zone_pgdat->node_id;
+        int nid = zone_to_nid(z);
         int zid = zone_idx(z);
         struct mem_cgroup_per_zone *mz;
         int lru = LRU_FILE * file + active;