From: Johannes Weiner <hannes@xxxxxxxxxxx> Subject: mm: memcontrol: kill mem_cgroup_nodeinfo() No need to encapsulate a simple struct member access. Link: https://lkml.kernel.org/r/20210209163304.77088-3-hannes@xxxxxxxxxxx Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx> Reviewed-by: Shakeel Butt <shakeelb@xxxxxxxxxx> Reviewed-by: Roman Gushchin <guro@xxxxxx> Acked-by: Michal Hocko <mhocko@xxxxxxxx> Reviewed-by: Michal Koutný <mkoutny@xxxxxxxx> Cc: Tejun Heo <tj@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/memcontrol.h | 8 +------- mm/memcontrol.c | 21 +++++++++++---------- 2 files changed, 12 insertions(+), 17 deletions(-) --- a/include/linux/memcontrol.h~mm-memcontrol-kill-mem_cgroup_nodeinfo +++ a/include/linux/memcontrol.h @@ -602,12 +602,6 @@ void mem_cgroup_uncharge_list(struct lis void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); -static struct mem_cgroup_per_node * -mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) -{ - return memcg->nodeinfo[nid]; -} - /** * mem_cgroup_lruvec - get the lru list vector for a memcg & node * @memcg: memcg of the wanted lruvec @@ -631,7 +625,7 @@ static inline struct lruvec *mem_cgroup_ if (!memcg) memcg = root_mem_cgroup; - mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); + mz = memcg->nodeinfo[pgdat->node_id]; lruvec = &mz->lruvec; out: /* --- a/mm/memcontrol.c~mm-memcontrol-kill-mem_cgroup_nodeinfo +++ a/mm/memcontrol.c @@ -414,13 +414,14 @@ static int memcg_expand_one_shrinker_map int size, int old_size) { struct memcg_shrinker_map *new, *old; + struct mem_cgroup_per_node *pn; int nid; lockdep_assert_held(&memcg_shrinker_map_mutex); for_each_node(nid) { - old = rcu_dereference_protected( - mem_cgroup_nodeinfo(memcg, nid)->shrinker_map, true); + pn = memcg->nodeinfo[nid]; + old = rcu_dereference_protected(pn->shrinker_map, true); /* Not yet online memcg */ if (!old) return 0; @@ -433,7 +434,7 @@ static int memcg_expand_one_shrinker_map memset(new->map, (int)0xff, old_size); memset((void *)new->map + old_size, 0, size - old_size); - rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_map, new); + rcu_assign_pointer(pn->shrinker_map, new); call_rcu(&old->rcu, memcg_free_shrinker_map_rcu); } @@ -450,7 +451,7 @@ static void memcg_free_shrinker_maps(str return; for_each_node(nid) { - pn = mem_cgroup_nodeinfo(memcg, nid); + pn = memcg->nodeinfo[nid]; map = rcu_dereference_protected(pn->shrinker_map, true); kvfree(map); rcu_assign_pointer(pn->shrinker_map, NULL); @@ -713,7 +714,7 @@ static void mem_cgroup_remove_from_trees int nid; for_each_node(nid) { - mz = mem_cgroup_nodeinfo(memcg, nid); + mz = memcg->nodeinfo[nid]; mctz = soft_limit_tree_node(nid); if (mctz) mem_cgroup_remove_exceeded(mz, mctz); @@ -796,7 +797,7 @@ parent_nodeinfo(struct mem_cgroup_per_no parent = parent_mem_cgroup(pn->memcg); if (!parent) return NULL; - return mem_cgroup_nodeinfo(parent, nid); + return parent->nodeinfo[nid]; } void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, @@ -1136,7 +1137,7 @@ struct mem_cgroup *mem_cgroup_iter(struc if (reclaim) { struct mem_cgroup_per_node *mz; - mz = mem_cgroup_nodeinfo(root, reclaim->pgdat->node_id); + mz = root->nodeinfo[reclaim->pgdat->node_id]; iter = &mz->iter; if (prev && reclaim->generation != iter->generation) @@ -1238,7 +1239,7 @@ static void __invalidate_reclaim_iterato int nid; for_each_node(nid) { - mz = mem_cgroup_nodeinfo(from, nid); + mz = from->nodeinfo[nid]; iter = &mz->iter; cmpxchg(&iter->position, dead_memcg, NULL); } @@ -2397,7 +2398,7 @@ static int memcg_hotplug_cpu_dead(unsign struct mem_cgroup_per_node *pn; long x; - pn = mem_cgroup_nodeinfo(memcg, nid); + pn = memcg->nodeinfo[nid]; lstatc = per_cpu_ptr(pn->lruvec_stat_cpu, cpu); x = lstatc->count[i]; @@ -4098,7 +4099,7 @@ static int memcg_stat_show(struct seq_fi unsigned long file_cost = 0; for_each_online_pgdat(pgdat) { - mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); + mz = memcg->nodeinfo[pgdat->node_id]; anon_cost += mz->lruvec.anon_cost; file_cost += mz->lruvec.file_cost; _
