memcg: remove nid and zid argument from mem_cgroup_soft_limit_reclaim()

mem_cgroup_soft_limit_reclaim() has zone, nid and zid argument.  but nid
and zid can be calculated from zone.  So remove it.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Cc: Balbir Singh <balbir@in.ibm.com>
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>

2 files changed, 4 insertions, 8 deletions

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 8d0bfd7fe328..5e95996ddfb1 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2865,8 +2865,7 @@ static int mem_cgroup_resize_memsw_limit(struct mem_cgroup *memcg,
 }
 
 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
-                                                gfp_t gfp_mask, int nid,
-                                                int zid)
+                                            gfp_t gfp_mask)
 {
         unsigned long nr_reclaimed = 0;
         struct mem_cgroup_per_zone *mz, *next_mz = NULL;
@@ -2878,7 +2877,7 @@ unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
         if (order > 0)
                 return 0;
 
-        mctz = soft_limit_tree_node_zone(nid, zid);
+        mctz = soft_limit_tree_node_zone(zone_to_nid(zone), zone_idx(zone));
         /*
          * This loop can run a while, specially if mem_cgroup's continuously
          * keep exceeding their soft limit and putting the system under
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 06ccda66dec0..c391c320dbaf 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2168,7 +2168,6 @@ loop_again:
                 for (i = 0; i <= end_zone; i++) {
                         struct zone *zone = pgdat->node_zones + i;
                         int nr_slab;
-                        int nid, zid;
 
                         if (!populated_zone(zone))
                                 continue;
@@ -2178,14 +2177,12 @@ loop_again:
 
                         sc.nr_scanned = 0;
 
-                        nid = pgdat->node_id;
-                        zid = zone_idx(zone);
                         /*
                          * Call soft limit reclaim before calling shrink_zone.
                          * For now we ignore the return value
                          */
-                        mem_cgroup_soft_limit_reclaim(zone, order, sc.gfp_mask,
-                                                        nid, zid);
+                        mem_cgroup_soft_limit_reclaim(zone, order, sc.gfp_mask);
+
                         /*
                          * We put equal pressure on every zone, unless one
                          * zone has way too many pages free already.