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authorJohannes Weiner <hannes@cmpxchg.org>2016-01-14 15:20:56 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-14 16:00:49 -0800
commit7d828602e5ef3297a69392a2d31264e4ab9c8bb7 (patch)
tree4d6d6d82b2c68321175e4e769dadb146c72ef882
parent036404183eb3ebff93dea7b572fc718e9d652c7f (diff)
mm: memcontrol: export root_mem_cgroup
A later patch will need this symbol in files other than memcontrol.c, so export it now and replace mem_cgroup_root_css at the same time. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: David S. Miller <davem@davemloft.net> Reviewed-by: Vladimir Davydov <vdavydov@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/memcontrol.h3
-rw-r--r--mm/backing-dev.c2
-rw-r--r--mm/memcontrol.c5
3 files changed, 5 insertions, 5 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 78a1ec2e23fc..d0c724f53691 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -265,7 +265,8 @@ struct mem_cgroup {
struct mem_cgroup_per_node *nodeinfo[0];
/* WARNING: nodeinfo must be the last member here */
};
-extern struct cgroup_subsys_state *mem_cgroup_root_css;
+
+extern struct mem_cgroup *root_mem_cgroup;
/**
* mem_cgroup_events - count memory events against a cgroup
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 7340353f8aea..cc5d29d2da9b 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -672,7 +672,7 @@ static int cgwb_bdi_init(struct backing_dev_info *bdi)
ret = wb_init(&bdi->wb, bdi, 1, GFP_KERNEL);
if (!ret) {
- bdi->wb.memcg_css = mem_cgroup_root_css;
+ bdi->wb.memcg_css = &root_mem_cgroup->css;
bdi->wb.blkcg_css = blkcg_root_css;
}
return ret;
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 0bc140d998ad..44ed2dee8f0c 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -76,9 +76,9 @@
struct cgroup_subsys memory_cgrp_subsys __read_mostly;
EXPORT_SYMBOL(memory_cgrp_subsys);
+struct mem_cgroup *root_mem_cgroup __read_mostly;
+
#define MEM_CGROUP_RECLAIM_RETRIES 5
-static struct mem_cgroup *root_mem_cgroup __read_mostly;
-struct cgroup_subsys_state *mem_cgroup_root_css __read_mostly;
/* Whether the swap controller is active */
#ifdef CONFIG_MEMCG_SWAP
@@ -4241,7 +4241,6 @@ mem_cgroup_css_alloc(struct cgroup_subsys_state *parent_css)
/* root ? */
if (parent_css == NULL) {
root_mem_cgroup = memcg;
- mem_cgroup_root_css = &memcg->css;
page_counter_init(&memcg->memory, NULL);
memcg->high = PAGE_COUNTER_MAX;
memcg->soft_limit = PAGE_COUNTER_MAX;