[v7,12/17] mm: Export mem_cgroup_is_root()

Commit Message

Kirill Tkhai May 22, 2018, 10:09 a.m. UTC

This will be used in next patch.

Signed-off-by: Kirill Tkhai <[e-mail]>
---
 include/linux/memcontrol.h |   10 ++++++++++
 mm/memcontrol.c            |    5 -----
 2 files changed, 10 insertions(+), 5 deletions(-)

Patch

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index e51c6e953d7a..24abed028c6e 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -311,6 +311,11 @@  struct mem_cgroup {
 
 extern struct mem_cgroup *root_mem_cgroup;
 
+static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg)
+{
+	return (memcg == root_mem_cgroup);
+}
+
 static inline bool mem_cgroup_disabled(void)
 {
 	return !cgroup_subsys_enabled(memory_cgrp_subsys);
@@ -780,6 +785,11 @@  void mem_cgroup_split_huge_fixup(struct page *head);
 
 struct mem_cgroup;
 
+static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg)
+{
+	return true;
+}
+
 static inline bool mem_cgroup_disabled(void)
 {
 	return true;
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index a86dfeaa9aa1..a886fc7398e9 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -261,11 +261,6 @@  struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr)
 	return &container_of(vmpr, struct mem_cgroup, vmpressure)->css;
 }
 
-static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg)
-{
-	return (memcg == root_mem_cgroup);
-}
-
 #ifdef CONFIG_MEMCG_KMEM
 /*
  * This will be the memcg's index in each cache's ->memcg_params.memcg_caches.