memcg: mem_cgroup_shrink_node_zone() doesn't need sc.nodemask

Currently mem_cgroup_shrink_node_zone() call shrink_zone() directly.  thus
it doesn't need to initialize sc.nodemask because shrink_zone() doesn't
use it at all.

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>

3 files changed, 3 insertions, 8 deletions

diff --git a/include/linux/swap.h b/include/linux/swap.h
index 91c9d3fc8513..2fee51a11b73 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -244,8 +244,7 @@ extern unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem,
 extern unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
                                                 gfp_t gfp_mask, bool noswap,
                                                 unsigned int swappiness,
-                                                struct zone *zone,
-                                                int nid);
+                                                struct zone *zone);
 extern int __isolate_lru_page(struct page *page, int mode, int file);
 extern unsigned long shrink_all_memory(unsigned long nr_pages);
 extern int vm_swappiness;
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index a1c3c317a4dd..8d0bfd7fe328 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1300,8 +1300,7 @@ static int mem_cgroup_hierarchical_reclaim(struct mem_cgroup *root_mem,
                 /* we use swappiness of local cgroup */
                 if (check_soft)
                         ret = mem_cgroup_shrink_node_zone(victim, gfp_mask,
-                                noswap, get_swappiness(victim), zone,
-                                zone->zone_pgdat->node_id);
+                                noswap, get_swappiness(victim), zone);
                 else
                         ret = try_to_free_mem_cgroup_pages(victim, gfp_mask,
                                                 noswap, get_swappiness(victim));
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 291270496b6f..06ccda66dec0 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1969,7 +1969,7 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
 unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
                                                 gfp_t gfp_mask, bool noswap,
                                                 unsigned int swappiness,
-                                                struct zone *zone, int nid)
+                                                struct zone *zone)
 {
         struct scan_control sc = {
                 .nr_to_reclaim = SWAP_CLUSTER_MAX,
@@ -1980,11 +1980,8 @@ unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
                 .order = 0,
                 .mem_cgroup = mem,
         };
-        nodemask_t nm  = nodemask_of_node(nid);
-
         sc.gfp_mask = (gfp_mask & GFP_RECLAIM_MASK) |
                         (GFP_HIGHUSER_MOVABLE & ~GFP_RECLAIM_MASK);
-        sc.nodemask = &nm;
 
         trace_mm_vmscan_memcg_softlimit_reclaim_begin(0,
                                                       sc.may_writepage,