115 struct cgroup_subsys_state *css_next_child(struct cgroup_subsys_state *pos,
117 struct cgroup_subsys_state *css_next_descendant_pre(struct cgroup_subsys_state *pos,
119 struct cgroup_subsys_state *css_rightmost_descendant(struct cgroup_subsys_state *pos);
120 struct cgroup_subsys_state *css_next_descendant_post(struct cgroup_subsys_state *pos,
151 #define css_for_each_child(pos, parent)					\  argument
152 	for ((pos) = css_next_child(NULL, (parent)); (pos);		\
153 	     (pos) = css_next_child((pos), (parent)))
211 #define css_for_each_descendant_pre(pos, css)				\  argument
212 	for ((pos) = css_next_descendant_pre(NULL, (css)); (pos);	\
213 	     (pos) = css_next_descendant_pre((pos), (css)))
234 #define css_for_each_descendant_post(pos, css)				\  argument
235 	for ((pos) = css_next_descendant_post(NULL, (css)); (pos);	\
236 	     (pos) = css_next_descendant_post((pos), (css)))