345 struct cgroup_subsys_state *css_next_child(struct cgroup_subsys_state *pos,
368 #define css_for_each_child(pos, parent)					\  argument
369 	for ((pos) = css_next_child(NULL, (parent)); (pos);		\
370 	     (pos) = css_next_child((pos), (parent)))
373 css_next_descendant_pre(struct cgroup_subsys_state *pos,
377 css_rightmost_descendant(struct cgroup_subsys_state *pos);
435 #define css_for_each_descendant_pre(pos, css)				\  argument
436 	for ((pos) = css_next_descendant_pre(NULL, (css)); (pos);	\
437 	     (pos) = css_next_descendant_pre((pos), (css)))
440 css_next_descendant_post(struct cgroup_subsys_state *pos,
462 #define css_for_each_descendant_post(pos, css)				\  argument
463 	for ((pos) = css_next_descendant_post(NULL, (css)); (pos);	\
464 	     (pos) = css_next_descendant_post((pos), (css)))