memcg: export struct mem_cgroup

[mirror_ubuntu-bionic-kernel.git] / include / linux / swap.h

diff --git a/include/linux/swap.h b/include/linux/swap.h
index 6282f1eb3d6a3f179fc070f03ea80605d8c530aa..2ce190709280f2281d0e755fd36915cfbcc5cc44 100644 (file)
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -351,7 +351,15 @@ extern void check_move_unevictable_pages(struct page **, int nr_pages);
 extern int kswapd_run(int nid);
 extern void kswapd_stop(int nid);
 #ifdef CONFIG_MEMCG
-extern int mem_cgroup_swappiness(struct mem_cgroup *mem);
+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)
 {