memcg: add mem_cgroup_disabled()
We check mem_cgroup is disabled or not by checking
mem_cgroup_subsys.disabled. I think it has more references than expected,
now.
replacing
if (mem_cgroup_subsys.disabled)
with
if (mem_cgroup_disabled())
give us good look, I think.
[kamezawa.hiroyu@jp.fujitsu.com: fix typo]
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/page_cgroup.c b/mm/page_cgroup.c
index 74ae8e0..7006a11 100644
--- a/mm/page_cgroup.c
+++ b/mm/page_cgroup.c
@@ -74,7 +74,7 @@
int nid, fail;
- if (mem_cgroup_subsys.disabled)
+ if (mem_cgroup_disabled())
return;
for_each_online_node(nid) {
@@ -247,7 +247,7 @@
unsigned long pfn;
int fail = 0;
- if (mem_cgroup_subsys.disabled)
+ if (mem_cgroup_disabled())
return;
for (pfn = 0; !fail && pfn < max_pfn; pfn += PAGES_PER_SECTION) {