diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index b76999954beb5ffbb835cd66dc917a051fb194e2..4afe544d35479329d42d83ab757d6869eedf4693 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -112,6 +112,24 @@ static inline void css_get(struct cgroup_subsys_state *css)
 		percpu_ref_get(&css->refcnt);
 }
 
+/**
+ * css_tryget - try to obtain a reference on the specified css
+ * @css: target css
+ *
+ * Obtain a reference on @css unless it already has reached zero and is
+ * being released.  This function doesn't care whether @css is on or
+ * offline.  The caller naturally needs to ensure that @css is accessible
+ * but doesn't have to be holding a reference on it - IOW, RCU protected
+ * access is good enough for this function.  Returns %true if a reference
+ * count was successfully obtained; %false otherwise.
+ */
+static inline bool css_tryget(struct cgroup_subsys_state *css)
+{
+	if (!(css->flags & CSS_NO_REF))
+		return percpu_ref_tryget(&css->refcnt);
+	return true;
+}
+
 /**
  * css_tryget_online - try to obtain a reference on the specified css if online
  * @css: target css