[PATCH 4/8] cgroup: export cgroup_get() and cgroup_put()

[serge@hallyn.com]

From: Aditya Kali <adityakali@google.com>

move cgroup_get() and cgroup_put() into cgroup.h so that
they can be called from other places.

Signed-off-by: Aditya Kali <adityakali@google.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
---
 include/linux/cgroup.h |   21 +++++++++++++++++++++
 kernel/cgroup.c        |   22 ----------------------
 2 files changed, 21 insertions(+), 22 deletions(-)

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 29f0b02..99096be 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -231,6 +231,27 @@ void css_task_iter_end(struct css_task_iter *it);
 #define css_for_each_descendant_post(pos, css)				\
 	for ((pos) = css_next_descendant_post(NULL, (css)); (pos);	\
 	     (pos) = css_next_descendant_post((pos), (css)))
+/* convenient tests for these bits */
+static inline bool cgroup_is_dead(const struct cgroup *cgrp)
+{
+	return !(cgrp->self.flags & CSS_ONLINE);
+}
+
+static inline void cgroup_get(struct cgroup *cgrp)
+{
+	WARN_ON_ONCE(cgroup_is_dead(cgrp));
+	css_get(&cgrp->self);
+}
+
+static inline bool cgroup_tryget(struct cgroup *cgrp)
+{
+	return css_tryget(&cgrp->self);
+}
+
+static inline void cgroup_put(struct cgroup *cgrp)
+{
+	css_put(&cgrp->self);
+}
 
 /**
  * cgroup_taskset_for_each - iterate cgroup_taskset
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index e29c346..e972259 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -417,28 +417,6 @@ out_unlock:
 	return css;
 }
 
-/* convenient tests for these bits */
-static inline bool cgroup_is_dead(const struct cgroup *cgrp)
-{
-	return !(cgrp->self.flags & CSS_ONLINE);
-}
-
-static void cgroup_get(struct cgroup *cgrp)
-{
-	WARN_ON_ONCE(cgroup_is_dead(cgrp));
-	css_get(&cgrp->self);
-}
-
-static bool cgroup_tryget(struct cgroup *cgrp)
-{
-	return css_tryget(&cgrp->self);
-}
-
-static void cgroup_put(struct cgroup *cgrp)
-{
-	css_put(&cgrp->self);
-}
-
 struct cgroup_subsys_state *of_css(struct kernfs_open_file *of)
 {
 	struct cgroup *cgrp = of->kn->parent->priv;
-- 
1.7.9.5