This is a prepared patch for converting from per-cgroup id to
per-subsystem id.
We should not access per-cgroup id directly, since this is implemetation
detail. Use the accessor css_from_id() instead.
This patch has no functional change.
Signed-off-by: Jianyu Zhan <nasa4836@xxxxxxxxx>
---
mm/memcontrol.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 80d9e38..46333cb 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -528,10 +528,10 @@ static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg)
static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg)
{
/*
- * The ID of the root cgroup is 0, but memcg treat 0 as an
- * invalid ID, so we return (cgroup_id + 1).
+ * The ID of css for the root cgroup is 0, but memcg treat 0 as an
+ * invalid ID, so we return (id + 1).
*/
- return memcg->css.cgroup->id + 1;
+ return css_to_id(&memcg->css) + 1;
}
static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id)
@@ -6407,7 +6407,7 @@ mem_cgroup_css_online(struct cgroup_subsys_state *css)
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
struct mem_cgroup *parent = mem_cgroup_from_css(css_parent(css));
- if (css->cgroup->id > MEM_CGROUP_ID_MAX)
+ if (css_to_id(css) > MEM_CGROUP_ID_MAX)
return -ENOSPC;
if (!parent)
--
2.0.0-rc0
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>