[PATCH 01/13] mm: memcontrol: export root_mem_cgroup
From: Johannes Weiner <hannes@cmpxchg.org>
Date: 2015-11-24 21:52:26
Also in:
cgroups, linux-mm, lkml
Subsystem:
control group - memory resource controller (memcg), memory management, memory management - misc, the rest · Maintainers:
Johannes Weiner, Michal Hocko, Roman Gushchin, Shakeel Butt, Andrew Morton, David Hildenbrand, Linus Torvalds
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 <redacted> --- include/linux/memcontrol.h | 3 ++- mm/backing-dev.c | 2 +- mm/memcontrol.c | 5 ++--- 3 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 9d5472b..320b690 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 9160853..fdc6f4d 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c@@ -707,7 +707,7 @@ 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 79a29d5..f6ea649 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
@@ -4217,7 +4217,6 @@ 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;
--
2.6.2