On Fri, Jun 22, 2018 at 5:06 PM Roman Gushchin <g...@fb.com> wrote: > > 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 <g...@fb.com>
Reviewed-by: Shakeel Butt <shake...@google.com> > Cc: Shakeel Butt <shake...@google.com> > Cc: Johannes Weiner <han...@cmpxchg.org> > Cc: Michal Hocko <mho...@kernel.org> > Cc: Andrew Morton <a...@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 >