mm: memcontrol: remove unnecessary memcg argument from soft limit functions

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Jianyu Zhan <nasa4836@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index d6564d88d46a741129817f695ac959531878ae72..77d033845d54354c6e2792d7646b68a23a342882 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -713,11 +713,9 @@ soft_limit_tree_from_page(struct page *page)
        return &soft_limit_tree.rb_tree_per_node[nid]->rb_tree_per_zone[zid];
 }
 
-static void
-__mem_cgroup_insert_exceeded(struct mem_cgroup *memcg,
-                               struct mem_cgroup_per_zone *mz,
-                               struct mem_cgroup_tree_per_zone *mctz,
-                               unsigned long long new_usage_in_excess)
+static void __mem_cgroup_insert_exceeded(struct mem_cgroup_per_zone *mz,
+                                        struct mem_cgroup_tree_per_zone *mctz,
+                                        unsigned long long new_usage_in_excess)
 {
        struct rb_node **p = &mctz->rb_root.rb_node;
        struct rb_node *parent = NULL;
@@ -747,10 +745,8 @@ __mem_cgroup_insert_exceeded(struct mem_cgroup *memcg,
        mz->on_tree = true;
 }
 
-static void
-__mem_cgroup_remove_exceeded(struct mem_cgroup *memcg,
-                               struct mem_cgroup_per_zone *mz,
-                               struct mem_cgroup_tree_per_zone *mctz)
+static void __mem_cgroup_remove_exceeded(struct mem_cgroup_per_zone *mz,
+                                        struct mem_cgroup_tree_per_zone *mctz)
 {
        if (!mz->on_tree)
                return;
@@ -758,13 +754,11 @@ __mem_cgroup_remove_exceeded(struct mem_cgroup *memcg,
        mz->on_tree = false;
 }
 
-static void
-mem_cgroup_remove_exceeded(struct mem_cgroup *memcg,
-                               struct mem_cgroup_per_zone *mz,
-                               struct mem_cgroup_tree_per_zone *mctz)
+static void mem_cgroup_remove_exceeded(struct mem_cgroup_per_zone *mz,
+                                      struct mem_cgroup_tree_per_zone *mctz)
 {
        spin_lock(&mctz->lock);
-       __mem_cgroup_remove_exceeded(memcg, mz, mctz);
+       __mem_cgroup_remove_exceeded(mz, mctz);
        spin_unlock(&mctz->lock);
 }
 
@@ -791,12 +785,12 @@ static void mem_cgroup_update_tree(struct mem_cgroup *memcg, struct page *page)
                        spin_lock(&mctz->lock);
                        /* if on-tree, remove it */
                        if (mz->on_tree)
-                               __mem_cgroup_remove_exceeded(memcg, mz, mctz);
+                               __mem_cgroup_remove_exceeded(mz, mctz);
                        /*
                         * Insert again. mz->usage_in_excess will be updated.
                         * If excess is 0, no tree ops.
                         */
-                       __mem_cgroup_insert_exceeded(memcg, mz, mctz, excess);
+                       __mem_cgroup_insert_exceeded(mz, mctz, excess);
                        spin_unlock(&mctz->lock);
                }
        }
@@ -812,7 +806,7 @@ static void mem_cgroup_remove_from_trees(struct mem_cgroup *memcg)
                for (zid = 0; zid < MAX_NR_ZONES; zid++) {
                        mz = &memcg->nodeinfo[nid]->zoneinfo[zid];
                        mctz = soft_limit_tree_node_zone(nid, zid);
-                       mem_cgroup_remove_exceeded(memcg, mz, mctz);
+                       mem_cgroup_remove_exceeded(mz, mctz);
                }
        }
 }
@@ -835,7 +829,7 @@ retry:
         * we will to add it back at the end of reclaim to its correct
         * position in the tree.
         */
-       __mem_cgroup_remove_exceeded(mz->memcg, mz, mctz);
+       __mem_cgroup_remove_exceeded(mz, mctz);
        if (!res_counter_soft_limit_excess(&mz->memcg->res) ||
                !css_tryget(&mz->memcg->css))
                goto retry;
@@ -4646,7 +4640,7 @@ unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
                                        break;
                        } while (1);
                }
-               __mem_cgroup_remove_exceeded(mz->memcg, mz, mctz);
+               __mem_cgroup_remove_exceeded(mz, mctz);
                excess = res_counter_soft_limit_excess(&mz->memcg->res);
                /*
                 * One school of thought says that we should not add
@@ -4657,7 +4651,7 @@ unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
                 * term TODO.
                 */
                /* If excess == 0, no tree ops */
-               __mem_cgroup_insert_exceeded(mz->memcg, mz, mctz, excess);
+               __mem_cgroup_insert_exceeded(mz, mctz, excess);
                spin_unlock(&mctz->lock);
                css_put(&mz->memcg->css);
                loop++;