[PATCH v4 1/5] mm/memcg: Move mod_objcg_state() to memcontrol.c

[Waiman Long]

The mod_objcg_state() function is moved from mm/slab.h to mm/memcontrol.c
so that further optimization can be done to it in later patches without
exposing unnecessary details to other mm components.

Signed-off-by: Waiman Long <long...@redhat.com>
---
 mm/memcontrol.c | 13 +++++++++++++
 mm/slab.h       | 16 ++--------------
 2 files changed, 15 insertions(+), 14 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index e064ac0d850a..dc9032f28f2e 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3150,6 +3150,19 @@ void __memcg_kmem_uncharge_page(struct page *page, int 
order)
        css_put(&memcg->css);
 }
 
+void mod_objcg_state(struct obj_cgroup *objcg, struct pglist_data *pgdat,
+                    enum node_stat_item idx, int nr)
+{
+       struct mem_cgroup *memcg;
+       struct lruvec *lruvec = NULL;
+
+       rcu_read_lock();
+       memcg = obj_cgroup_memcg(objcg);
+       lruvec = mem_cgroup_lruvec(memcg, pgdat);
+       mod_memcg_lruvec_state(lruvec, idx, nr);
+       rcu_read_unlock();
+}
+
 static bool consume_obj_stock(struct obj_cgroup *objcg, unsigned int nr_bytes)
 {
        struct memcg_stock_pcp *stock;
diff --git a/mm/slab.h b/mm/slab.h
index 076582f58f68..ae8b85875426 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -239,6 +239,8 @@ static inline bool kmem_cache_debug_flags(struct kmem_cache 
*s, slab_flags_t fla
 #ifdef CONFIG_MEMCG_KMEM
 int memcg_alloc_page_obj_cgroups(struct page *page, struct kmem_cache *s,
                                 gfp_t gfp, bool new_page);
+void mod_objcg_state(struct obj_cgroup *objcg, struct pglist_data *pgdat,
+                    enum node_stat_item idx, int nr);
 
 static inline void memcg_free_page_obj_cgroups(struct page *page)
 {
@@ -283,20 +285,6 @@ static inline bool memcg_slab_pre_alloc_hook(struct 
kmem_cache *s,
        return true;
 }
 
-static inline void mod_objcg_state(struct obj_cgroup *objcg,
-                                  struct pglist_data *pgdat,
-                                  enum node_stat_item idx, int nr)
-{
-       struct mem_cgroup *memcg;
-       struct lruvec *lruvec;
-
-       rcu_read_lock();
-       memcg = obj_cgroup_memcg(objcg);
-       lruvec = mem_cgroup_lruvec(memcg, pgdat);
-       mod_memcg_lruvec_state(lruvec, idx, nr);
-       rcu_read_unlock();
-}
-
 static inline void memcg_slab_post_alloc_hook(struct kmem_cache *s,
                                              struct obj_cgroup *objcg,
                                              gfp_t flags, size_t size,
-- 
2.18.1