mm: memcontrol: charge swap to cgroup2

[linux-2.6-block.git] / include / linux / swap.h

diff --git a/include/linux/swap.h b/include/linux/swap.h
index 414e101cd06195fe60339e71a8dfd2487001df7e..83b95f343ab10b25b09ca38fac839a87ac3f095e 100644 (file)
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -368,11 +368,17 @@ static inline int mem_cgroup_swappiness(struct mem_cgroup *mem)
 #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)
 {
 }