linux-kernel - [PATCH 2/2 cgroup/for-3.20] cgroup: add dummy css_put() for !CONFIG

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Date:	Tue, 6 Jan 2015 11:58:15 -0500
From:	Tejun Heo <tj@...nel.org>
To:	Li Zefan <lizefan@...wei.com>
Cc:	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2 cgroup/for-3.20] cgroup: add dummy css_put() for
 !CONFIG_CGROUPS

This will later be depended upon by the scheduled cgroup writeback
support.

Signed-off-by: Tejun Heo <tj@...nel.org>
---
 include/linux/cgroup.h |    4 ++++
 1 file changed, 4 insertions(+)

--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -943,6 +943,8 @@ struct cgroup_subsys_state *css_tryget_o
 
 #else /* !CONFIG_CGROUPS */
 
+struct cgroup_subsys_state;
+
 static inline int cgroup_init_early(void) { return 0; }
 static inline int cgroup_init(void) { return 0; }
 static inline void cgroup_fork(struct task_struct *p) {}
@@ -955,6 +957,8 @@ static inline int cgroupstats_build(stru
 	return -EINVAL;
 }
 
+static inline void css_put(struct cgroup_subsys_state *css) {}
+
 /* No cgroups - nothing to do */
 static inline int cgroup_attach_task_all(struct task_struct *from,
 					 struct task_struct *t)
--
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