From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lj1-f200.google.com (mail-lj1-f200.google.com [209.85.208.200]) by kanga.kvack.org (Postfix) with ESMTP id 74B216B000A for ; Wed, 1 Aug 2018 20:32:44 -0400 (EDT) Received: by mail-lj1-f200.google.com with SMTP id p8-v6so92315ljg.10 for ; Wed, 01 Aug 2018 17:32:44 -0700 (PDT) Received: from mx0a-00082601.pphosted.com (mx0b-00082601.pphosted.com. [67.231.153.30]) by mx.google.com with ESMTPS id 13-v6si155955lfz.188.2018.08.01.17.32.42 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 01 Aug 2018 17:32:43 -0700 (PDT) From: Roman Gushchin Subject: [PATCH v2 1/3] mm: introduce mem_cgroup_put() helper Date: Wed, 1 Aug 2018 17:31:59 -0700 Message-ID: <20180802003201.817-2-guro@fb.com> In-Reply-To: <20180802003201.817-1-guro@fb.com> References: <20180802003201.817-1-guro@fb.com> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: Michal Hocko , Johannes Weiner , David Rientjes , Tetsuo Handa , Tejun Heo , kernel-team@fb.com, linux-kernel@vger.kernel.org, Roman Gushchin , Andrew Morton , Stephen Rothwell Introduce the mem_cgroup_put() helper, which helps to eliminate guarding memcg css release with "#ifdef CONFIG_MEMCG" in multiple places. Link: http://lkml.kernel.org/r/20180623000600.5818-2-guro@fb.com Signed-off-by: Roman Gushchin Reviewed-by: Shakeel Butt Reviewed-by: Andrew Morton Acked-by: Johannes Weiner Acked-by: Michal Hocko Signed-off-by: Andrew Morton Signed-off-by: Stephen Rothwell --- include/linux/memcontrol.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 6c6fb116e925..e53e00cdbe3f 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -375,6 +375,11 @@ 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) @@ -837,6 +842,10 @@ 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