+
+#ifdef CONFIG_MEMCG
+static inline int mem_cgroup_swappiness(struct mem_cgroup *memcg)
+{
+ /* root ? */
+ if (mem_cgroup_disabled() || !memcg->css.parent)
+ return vm_swappiness;
+
+ return memcg->swappiness;
+}
+
+#else
+static inline int mem_cgroup_swappiness(struct mem_cgroup *mem)
+{
+ return vm_swappiness;
+}
+#endif
+
+#ifdef CONFIG_MEMCG_SWAP
+extern void mem_cgroup_swapout(struct page *page, swp_entry_t entry);
+extern int mem_cgroup_try_charge_swap(struct page *page, swp_entry_t entry);
+extern void mem_cgroup_uncharge_swap(swp_entry_t entry);
+#else
+static inline void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
+{
+}
+
+static inline int mem_cgroup_try_charge_swap(struct page *page,
+ swp_entry_t entry)
+{
+ return 0;
+}
+
+static inline void mem_cgroup_uncharge_swap(swp_entry_t entry)
+{
+}
+#endif
+