Messages in this thread Patch in this message | | | From | Roman Gushchin <> | Subject | [PATCH 2/2] mm: introduce mem_cgroup_put() helper | Date | Fri, 22 Jun 2018 17:06:00 -0700 |
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Introduce the mem_cgroup_put() helper, which helps to eliminate guarding memcg css release with "#ifdef CONFIG_MEMCG" in multiple places.
Signed-off-by: Roman Gushchin <guro@fb.com> Cc: Shakeel Butt <shakeelb@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> --- include/linux/memcontrol.h | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index cf1c3555328f..3607913032be 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -383,6 +383,11 @@ struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ return css ? container_of(css, struct mem_cgroup, css) : NULL; } +static inline void mem_cgroup_put(struct mem_cgroup *memcg) +{ + css_put(&memcg->css); +} + #define mem_cgroup_from_counter(counter, member) \ container_of(counter, struct mem_cgroup, member) @@ -852,6 +857,10 @@ static inline bool task_in_mem_cgroup(struct task_struct *task, return true; } +static inline void mem_cgroup_put(struct mem_cgroup *memcg) +{ +} + static inline struct mem_cgroup * mem_cgroup_iter(struct mem_cgroup *root, struct mem_cgroup *prev, -- 2.14.4
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