Patched in Tegra support.

1 files changed, 106 insertions, 347 deletions

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 0108a56f814..b9c1c06cd7a 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -21,27 +21,25 @@
 #define _LINUX_MEMCONTROL_H
 #include <linux/cgroup.h>
 #include <linux/vm_event_item.h>
-#include <linux/hardirq.h>
-#include <linux/jump_label.h>
 
 struct mem_cgroup;
 struct page_cgroup;
 struct page;
 struct mm_struct;
-struct kmem_cache;
 
 /* Stats that can be updated by kernel. */
 enum mem_cgroup_page_stat_item {
         MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */
 };
 
-struct mem_cgroup_reclaim_cookie {
-        struct zone *zone;
-        int priority;
-        unsigned int generation;
-};
+extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
+                                        struct list_head *dst,
+                                        unsigned long *scanned, int order,
+                                        int mode, struct zone *z,
+                                        struct mem_cgroup *mem_cont,
+                                        int active, int file);
 
-#ifdef CONFIG_MEMCG
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR
 /*
  * All "charge" functions with gfp_mask should use GFP_KERNEL or
  * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't
@@ -57,16 +55,20 @@ extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
                                 gfp_t gfp_mask);
 /* for swap handling */
 extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
-                struct page *page, gfp_t mask, struct mem_cgroup **memcgp);
+                struct page *page, gfp_t mask, struct mem_cgroup **ptr);
 extern void mem_cgroup_commit_charge_swapin(struct page *page,
-                                        struct mem_cgroup *memcg);
-extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg);
+                                        struct mem_cgroup *ptr);
+extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);
 
 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
                                         gfp_t gfp_mask);
-
-struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *);
-struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *);
+extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru);
+extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru);
+extern void mem_cgroup_rotate_reclaimable_page(struct page *page);
+extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru);
+extern void mem_cgroup_del_lru(struct page *page);
+extern void mem_cgroup_move_lists(struct page *page,
+                                  enum lru_list from, enum lru_list to);
 
 /* For coalescing uncharge for reducing memcg' overhead*/
 extern void mem_cgroup_uncharge_start(void);
@@ -75,57 +77,49 @@ extern void mem_cgroup_uncharge_end(void);
 extern void mem_cgroup_uncharge_page(struct page *page);
 extern void mem_cgroup_uncharge_cache_page(struct page *page);
 
-bool __mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg,
-                                  struct mem_cgroup *memcg);
-int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg);
+extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
+int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
 
 extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page);
 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
 extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm);
 
-extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg);
-extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont);
-
 static inline
-bool mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *memcg)
+int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
 {
-        struct mem_cgroup *task_memcg;
-        bool match;
-
+        struct mem_cgroup *mem;
         rcu_read_lock();
-        task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
-        match = __mem_cgroup_same_or_subtree(memcg, task_memcg);
+        mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
         rcu_read_unlock();
-        return match;
+        return cgroup == mem;
 }
 
-extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg);
+extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem);
 
-extern void
-mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
-                             struct mem_cgroup **memcgp);
-extern void mem_cgroup_end_migration(struct mem_cgroup *memcg,
+extern int
+mem_cgroup_prepare_migration(struct page *page,
+        struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask);
+extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
         struct page *oldpage, struct page *newpage, bool migration_ok);
 
-struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *,
-                                   struct mem_cgroup *,
-                                   struct mem_cgroup_reclaim_cookie *);
-void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);
-
 /*
  * For memory reclaim.
  */
-int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec);
-int mem_cgroup_inactive_file_is_low(struct lruvec *lruvec);
+int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg);
+int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg);
 int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
-unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list);
-void mem_cgroup_update_lru_size(struct lruvec *, enum lru_list, int);
+unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg,
+                                        int nid, int zid, unsigned int lrumask);
+struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
+                                                      struct zone *zone);
+struct zone_reclaim_stat*
+mem_cgroup_get_reclaim_stat_from_page(struct page *page);
 extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
                                         struct task_struct *p);
 extern void mem_cgroup_replace_page_cache(struct page *oldpage,
                                         struct page *newpage);
 
-#ifdef CONFIG_MEMCG_SWAP
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
 extern int do_swap_account;
 #endif
 
@@ -136,34 +130,6 @@ static inline bool mem_cgroup_disabled(void)
         return false;
 }
 
-void __mem_cgroup_begin_update_page_stat(struct page *page, bool *locked,
-                                         unsigned long *flags);
-
-extern atomic_t memcg_moving;
-
-static inline void mem_cgroup_begin_update_page_stat(struct page *page,
-                                        bool *locked, unsigned long *flags)
-{
-        if (mem_cgroup_disabled())
-                return;
-        rcu_read_lock();
-        *locked = false;
-        if (atomic_read(&memcg_moving))
-                __mem_cgroup_begin_update_page_stat(page, locked, flags);
-}
-
-void __mem_cgroup_end_update_page_stat(struct page *page,
-                                unsigned long *flags);
-static inline void mem_cgroup_end_update_page_stat(struct page *page,
-                                        bool *locked, unsigned long *flags)
-{
-        if (mem_cgroup_disabled())
-                return;
-        if (*locked)
-                __mem_cgroup_end_update_page_stat(page, flags);
-        rcu_read_unlock();
-}
-
 void mem_cgroup_update_page_stat(struct page *page,
                                  enum mem_cgroup_page_stat_item idx,
                                  int val);
@@ -183,24 +149,18 @@ static inline void mem_cgroup_dec_page_stat(struct page *page,
 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
                                                 gfp_t gfp_mask,
                                                 unsigned long *total_scanned);
+u64 mem_cgroup_get_limit(struct mem_cgroup *mem);
 
-void __mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx);
-static inline void mem_cgroup_count_vm_event(struct mm_struct *mm,
-                                             enum vm_event_item idx)
-{
-        if (mem_cgroup_disabled())
-                return;
-        __mem_cgroup_count_vm_event(mm, idx);
-}
+void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx);
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
-void mem_cgroup_split_huge_fixup(struct page *head);
+void mem_cgroup_split_huge_fixup(struct page *head, struct page *tail);
 #endif
 
 #ifdef CONFIG_DEBUG_VM
 bool mem_cgroup_bad_page_check(struct page *page);
 void mem_cgroup_print_bad_page(struct page *page);
 #endif
-#else /* CONFIG_MEMCG */
+#else /* CONFIG_CGROUP_MEM_RES_CTLR */
 struct mem_cgroup;
 
 static inline int mem_cgroup_newpage_charge(struct page *page,
@@ -216,17 +176,17 @@ static inline int mem_cgroup_cache_charge(struct page *page,
 }
 
 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
-                struct page *page, gfp_t gfp_mask, struct mem_cgroup **memcgp)
+                struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
 {
         return 0;
 }
 
 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
-                                          struct mem_cgroup *memcg)
+                                          struct mem_cgroup *ptr)
 {
 }
 
-static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg)
+static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
 {
 }
 
@@ -246,16 +206,33 @@ static inline void mem_cgroup_uncharge_cache_page(struct page *page)
 {
 }
 
-static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone,
-                                                    struct mem_cgroup *memcg)
+static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
 {
-        return &zone->lruvec;
 }
 
-static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page,
-                                                    struct zone *zone)
+static inline void mem_cgroup_del_lru_list(struct page *page, int lru)
+{
+        return ;
+}
+
+static inline void mem_cgroup_rotate_reclaimable_page(struct page *page)
+{
+        return ;
+}
+
+static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru)
+{
+        return ;
+}
+
+static inline void mem_cgroup_del_lru(struct page *page)
+{
+        return ;
+}
+
+static inline void
+mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to)
 {
-        return &zone->lruvec;
 }
 
 static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
@@ -268,45 +245,46 @@ static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm
         return NULL;
 }
 
-static inline bool mm_match_cgroup(struct mm_struct *mm,
-                struct mem_cgroup *memcg)
+static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
 {
-        return true;
+        return 1;
 }
 
 static inline int task_in_mem_cgroup(struct task_struct *task,
-                                     const struct mem_cgroup *memcg)
+                                     const struct mem_cgroup *mem)
 {
         return 1;
 }
 
-static inline struct cgroup_subsys_state
-                *mem_cgroup_css(struct mem_cgroup *memcg)
+static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem)
 {
         return NULL;
 }
 
-static inline void
+static inline int
 mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
-                             struct mem_cgroup **memcgp)
+        struct mem_cgroup **ptr, gfp_t gfp_mask)
 {
+        return 0;
 }
 
-static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg,
+static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
                 struct page *oldpage, struct page *newpage, bool migration_ok)
 {
 }
 
-static inline struct mem_cgroup *
-mem_cgroup_iter(struct mem_cgroup *root,
-                struct mem_cgroup *prev,
-                struct mem_cgroup_reclaim_cookie *reclaim)
+static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
+{
+        return 0;
+}
+
+static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
+                                                int priority)
 {
-        return NULL;
 }
 
-static inline void mem_cgroup_iter_break(struct mem_cgroup *root,
-                                         struct mem_cgroup *prev)
+static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
+                                                int priority)
 {
 }
 
@@ -316,41 +294,39 @@ static inline bool mem_cgroup_disabled(void)
 }
 
 static inline int
-mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
+mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg)
 {
         return 1;
 }
 
 static inline int
-mem_cgroup_inactive_file_is_low(struct lruvec *lruvec)
+mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg)
 {
         return 1;
 }
 
 static inline unsigned long
-mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru)
+mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, int nid, int zid,
+                                unsigned int lru_mask)
 {
         return 0;
 }
 
-static inline void
-mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru,
-                              int increment)
-{
-}
 
-static inline void
-mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
+static inline struct zone_reclaim_stat*
+mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone)
 {
+        return NULL;
 }
 
-static inline void mem_cgroup_begin_update_page_stat(struct page *page,
-                                        bool *locked, unsigned long *flags)
+static inline struct zone_reclaim_stat*
+mem_cgroup_get_reclaim_stat_from_page(struct page *page)
 {
+        return NULL;
 }
 
-static inline void mem_cgroup_end_update_page_stat(struct page *page,
-                                        bool *locked, unsigned long *flags)
+static inline void
+mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
 {
 }
 
@@ -372,7 +348,14 @@ unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
         return 0;
 }
 
-static inline void mem_cgroup_split_huge_fixup(struct page *head)
+static inline
+u64 mem_cgroup_get_limit(struct mem_cgroup *mem)
+{
+        return 0;
+}
+
+static inline void mem_cgroup_split_huge_fixup(struct page *head,
+                                                struct page *tail)
 {
 }
 
@@ -384,9 +367,9 @@ static inline void mem_cgroup_replace_page_cache(struct page *oldpage,
                                 struct page *newpage)
 {
 }
-#endif /* CONFIG_MEMCG */
+#endif /* CONFIG_CGROUP_MEM_CONT */
 
-#if !defined(CONFIG_MEMCG) || !defined(CONFIG_DEBUG_VM)
+#if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM)
 static inline bool
 mem_cgroup_bad_page_check(struct page *page)
 {
@@ -399,229 +382,5 @@ mem_cgroup_print_bad_page(struct page *page)
 }
 #endif
 
-enum {
-        UNDER_LIMIT,
-        SOFT_LIMIT,
-        OVER_LIMIT,
-};
-
-struct sock;
-#if defined(CONFIG_INET) && defined(CONFIG_MEMCG_KMEM)
-void sock_update_memcg(struct sock *sk);
-void sock_release_memcg(struct sock *sk);
-#else
-static inline void sock_update_memcg(struct sock *sk)
-{
-}
-static inline void sock_release_memcg(struct sock *sk)
-{
-}
-#endif /* CONFIG_INET && CONFIG_MEMCG_KMEM */
-
-#ifdef CONFIG_MEMCG_KMEM
-extern struct static_key memcg_kmem_enabled_key;
-
-extern int memcg_limited_groups_array_size;
-
-/*
- * Helper macro to loop through all memcg-specific caches. Callers must still
- * check if the cache is valid (it is either valid or NULL).
- * the slab_mutex must be held when looping through those caches
- */
-#define for_each_memcg_cache_index(_idx)        \
-        for ((_idx) = 0; i < memcg_limited_groups_array_size; (_idx)++)
-
-static inline bool memcg_kmem_enabled(void)
-{
-        return static_key_false(&memcg_kmem_enabled_key);
-}
-
-/*
- * In general, we'll do everything in our power to not incur in any overhead
- * for non-memcg users for the kmem functions. Not even a function call, if we
- * can avoid it.
- *
- * Therefore, we'll inline all those functions so that in the best case, we'll
- * see that kmemcg is off for everybody and proceed quickly.  If it is on,
- * we'll still do most of the flag checking inline. We check a lot of
- * conditions, but because they are pretty simple, they are expected to be
- * fast.
- */
-bool __memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg,
-                                        int order);
-void __memcg_kmem_commit_charge(struct page *page,
-                                       struct mem_cgroup *memcg, int order);
-void __memcg_kmem_uncharge_pages(struct page *page, int order);
-
-int memcg_cache_id(struct mem_cgroup *memcg);
-int memcg_register_cache(struct mem_cgroup *memcg, struct kmem_cache *s,
-                         struct kmem_cache *root_cache);
-void memcg_release_cache(struct kmem_cache *cachep);
-void memcg_cache_list_add(struct mem_cgroup *memcg, struct kmem_cache *cachep);
-
-int memcg_update_cache_size(struct kmem_cache *s, int num_groups);
-void memcg_update_array_size(int num_groups);
-
-struct kmem_cache *
-__memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp);
-
-void mem_cgroup_destroy_cache(struct kmem_cache *cachep);
-void kmem_cache_destroy_memcg_children(struct kmem_cache *s);
-
-/**
- * memcg_kmem_newpage_charge: verify if a new kmem allocation is allowed.
- * @gfp: the gfp allocation flags.
- * @memcg: a pointer to the memcg this was charged against.
- * @order: allocation order.
- *
- * returns true if the memcg where the current task belongs can hold this
- * allocation.
- *
- * We return true automatically if this allocation is not to be accounted to
- * any memcg.
- */
-static inline bool
-memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order)
-{
-        if (!memcg_kmem_enabled())
-                return true;
-
-        /*
-         * __GFP_NOFAIL allocations will move on even if charging is not
-         * possible. Therefore we don't even try, and have this allocation
-         * unaccounted. We could in theory charge it with
-         * res_counter_charge_nofail, but we hope those allocations are rare,
-         * and won't be worth the trouble.
-         */
-        if (!(gfp & __GFP_KMEMCG) || (gfp & __GFP_NOFAIL))
-                return true;
-        if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD))
-                return true;
-
-        /* If the test is dying, just let it go. */
-        if (unlikely(fatal_signal_pending(current)))
-                return true;
-
-        return __memcg_kmem_newpage_charge(gfp, memcg, order);
-}
-
-/**
- * memcg_kmem_uncharge_pages: uncharge pages from memcg
- * @page: pointer to struct page being freed
- * @order: allocation order.
- *
- * there is no need to specify memcg here, since it is embedded in page_cgroup
- */
-static inline void
-memcg_kmem_uncharge_pages(struct page *page, int order)
-{
-        if (memcg_kmem_enabled())
-                __memcg_kmem_uncharge_pages(page, order);
-}
-
-/**
- * memcg_kmem_commit_charge: embeds correct memcg in a page
- * @page: pointer to struct page recently allocated
- * @memcg: the memcg structure we charged against
- * @order: allocation order.
- *
- * Needs to be called after memcg_kmem_newpage_charge, regardless of success or
- * failure of the allocation. if @page is NULL, this function will revert the
- * charges. Otherwise, it will commit the memcg given by @memcg to the
- * corresponding page_cgroup.
- */
-static inline void
-memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order)
-{
-        if (memcg_kmem_enabled() && memcg)
-                __memcg_kmem_commit_charge(page, memcg, order);
-}
-
-/**
- * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation
- * @cachep: the original global kmem cache
- * @gfp: allocation flags.
- *
- * This function assumes that the task allocating, which determines the memcg
- * in the page allocator, belongs to the same cgroup throughout the whole
- * process.  Misacounting can happen if the task calls memcg_kmem_get_cache()
- * while belonging to a cgroup, and later on changes. This is considered
- * acceptable, and should only happen upon task migration.
- *
- * Before the cache is created by the memcg core, there is also a possible
- * imbalance: the task belongs to a memcg, but the cache being allocated from
- * is the global cache, since the child cache is not yet guaranteed to be
- * ready. This case is also fine, since in this case the GFP_KMEMCG will not be
- * passed and the page allocator will not attempt any cgroup accounting.
- */
-static __always_inline struct kmem_cache *
-memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
-{
-        if (!memcg_kmem_enabled())
-                return cachep;
-        if (gfp & __GFP_NOFAIL)
-                return cachep;
-        if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD))
-                return cachep;
-        if (unlikely(fatal_signal_pending(current)))
-                return cachep;
-
-        return __memcg_kmem_get_cache(cachep, gfp);
-}
-#else
-#define for_each_memcg_cache_index(_idx)        \
-        for (; NULL; )
-
-static inline bool memcg_kmem_enabled(void)
-{
-        return false;
-}
-
-static inline bool
-memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order)
-{
-        return true;
-}
-
-static inline void memcg_kmem_uncharge_pages(struct page *page, int order)
-{
-}
-
-static inline void
-memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order)
-{
-}
-
-static inline int memcg_cache_id(struct mem_cgroup *memcg)
-{
-        return -1;
-}
-
-static inline int
-memcg_register_cache(struct mem_cgroup *memcg, struct kmem_cache *s,
-                     struct kmem_cache *root_cache)
-{
-        return 0;
-}
-
-static inline void memcg_release_cache(struct kmem_cache *cachep)
-{
-}
-
-static inline void memcg_cache_list_add(struct mem_cgroup *memcg,
-                                        struct kmem_cache *s)
-{
-}
-
-static inline struct kmem_cache *
-memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
-{
-        return cachep;
-}
-
-static inline void kmem_cache_destroy_memcg_children(struct kmem_cache *s)
-{
-}
-#endif /* CONFIG_MEMCG_KMEM */
 #endif /* _LINUX_MEMCONTROL_H */