css_next_child
struct cgroup_subsys_state *css_next_child(struct cgroup_subsys_state *pos,
for ((pos) = css_next_child(NULL, (parent)); (pos); \
(pos) = css_next_child((pos), (parent)))
return css_next_child(curr, p->start_css);
kit->pos = css_next_child(kit->pos, kit->start);
return css_next_child(NULL, p->start_css);
if (css_next_child(NULL, cgroup_css(&ss->root->cgrp, ss)) &&
next = css_next_child(NULL, pos);
next = css_next_child(pos, pos->parent);
pos = css_next_child(NULL, pos);
next = css_next_child(pos, pos->parent);