336 static void *cgroup_idr_replace(struct idr *idr, void *ptr, int id)  in cgroup_idr_replace()  argument
341 	ret = idr_replace(idr, ptr, id);  in cgroup_idr_replace()
346 static void cgroup_idr_remove(struct idr *idr, int id)  in cgroup_idr_remove()  argument
349 	idr_remove(idr, id);  in cgroup_idr_remove()
489 		return rcu_dereference_check(cgrp->subsys[ss->id],  in cgroup_css()
517 	while (!(cgroup_ss_mask(cgrp) & (1 << ss->id))) {  in cgroup_e_css_by_mask()
555 	return init_css_set.subsys[ss->id];  in cgroup_e_css()
587 	css = init_css_set.subsys[ss->id];  in cgroup_get_e_css()
648 		return rcu_dereference_raw(cgrp->subsys[cft->ss->id]);  in of_css()
1295 	int id;  in cgroup_init_root_id()  local
1299 	id = idr_alloc_cyclic(&cgroup_hierarchy_idr, root, 0, 0, GFP_KERNEL);  in cgroup_init_root_id()
1300 	if (id < 0)  in cgroup_init_root_id()
1301 		return id;  in cgroup_init_root_id()
1303 	root->hierarchy_id = id;  in cgroup_init_root_id()
1826 		WARN_ON(!list_empty(&dcgrp->e_csets[ss->id]));  in rebind_subsystems()
1827 		list_for_each_entry_safe(cset, cset_pos, &scgrp->e_csets[ss->id],  in rebind_subsystems()
1828 					 e_cset_node[ss->id]) {  in rebind_subsystems()
1829 			list_move_tail(&cset->e_cset_node[ss->id],  in rebind_subsystems()
1830 				       &dcgrp->e_csets[ss->id]);  in rebind_subsystems()
1839 				if (it->cset_head == &scgrp->e_csets[ss->id])  in rebind_subsystems()
1840 					it->cset_head = &dcgrp->e_csets[ss->id];  in rebind_subsystems()
2153 		struct super_block *sb = fc->root->d_sb;  in cgroup_do_get_tree()  local
2164 		nsdentry = kernfs_node_dentry(cgrp->kn, sb);  in cgroup_do_get_tree()
2167 			deactivate_locked_super(sb);  in cgroup_do_get_tree()
2252 static void cgroup_kill_sb(struct super_block *sb)  in cgroup_kill_sb()  argument
2254 	struct kernfs_root *kf_root = kernfs_root_from_sb(sb);  in cgroup_kill_sb()
2269 	kernfs_kill_sb(sb);  in cgroup_kill_sb()
3151 	if (cgroup_control(cgrp) & (1 << ss->id))  in css_visible()
3153 	if (!(cgroup_ss_mask(cgrp) & (1 << ss->id)))  in css_visible()
3182 			if (!(cgroup_ss_mask(dsct) & (1 << ss->id)))  in cgroup_apply_control_enable()
3234 			    !(cgroup_ss_mask(dsct) & (1 << ss->id))) {  in cgroup_apply_control_disable()
4406 	if (!cgroup_ssid_enabled(ss->id))  in cgroup_add_cftypes()
4765 		cset = container_of(l, struct css_set, e_cset_node[it->ss->id]);  in css_task_iter_next_css_set()
4928 		it->cset_pos = &css->cgroup->e_csets[css->ss->id];  in css_task_iter_start()
5062 static int cgroup_may_write(const struct cgroup *cgrp, struct super_block *sb)  in cgroup_may_write()  argument
5069 	inode = kernfs_get_inode(sb, cgrp->procs_file.kn);  in cgroup_may_write()
5080 					 struct super_block *sb,  in cgroup_procs_write_permission()  argument
5093 	ret = cgroup_may_write(com_cgrp, sb);  in cgroup_procs_write_permission()
5111 				     struct super_block *sb, bool threadgroup,  in cgroup_attach_permissions()  argument
5116 	ret = cgroup_procs_write_permission(src_cgrp, dst_cgrp, sb, ns);  in cgroup_attach_permissions()
5356 		int id = css->id;  in css_free_rwork_fn()  local
5359 		cgroup_idr_remove(&ss->css_idr, id);  in css_free_rwork_fn()
5413 		cgroup_idr_replace(&ss->css_idr, NULL, css->id);  in css_release_work_fn()
5467 	css->id = -1;  in init_and_link_css()
5497 		rcu_assign_pointer(css->cgroup->subsys[ss->id], css);  in online_css()
5520 	RCU_INIT_POINTER(css->cgroup->subsys[ss->id], NULL);  in offline_css()
5559 	css->id = err;  in css_create()
5563 	cgroup_idr_replace(&ss->css_idr, css, css->id);  in css_create()
6002 		css->id = 1;  in cgroup_init_subsys()
6004 		css->id = cgroup_idr_alloc(&ss->css_idr, css, 1, 2, GFP_KERNEL);  in cgroup_init_subsys()
6005 		BUG_ON(css->id < 0);  in cgroup_init_subsys()
6012 	init_css_set.subsys[ss->id] = css;  in cgroup_init_subsys()
6014 	have_fork_callback |= (bool)ss->fork << ss->id;  in cgroup_init_subsys()
6015 	have_exit_callback |= (bool)ss->exit << ss->id;  in cgroup_init_subsys()
6016 	have_release_callback |= (bool)ss->release << ss->id;  in cgroup_init_subsys()
6017 	have_canfork_callback |= (bool)ss->can_fork << ss->id;  in cgroup_init_subsys()
6048 		WARN(!ss->css_alloc || !ss->css_free || ss->name || ss->id,  in cgroup_init_early()
6051 		     ss->id, ss->name);  in cgroup_init_early()
6055 		ss->id = i;  in cgroup_init_early()
6102 				init_css_set.subsys[ss->id];  in cgroup_init()
6104 			css->id = cgroup_idr_alloc(&ss->css_idr, css, 1, 2,  in cgroup_init()
6106 			BUG_ON(css->id < 0);  in cgroup_init()
6126 		cgrp_dfl_root.subsys_mask |= 1 << ss->id;  in cgroup_init()
6132 			cgrp_dfl_implicit_ss_mask |= 1 << ss->id;  in cgroup_init()
6134 			cgrp_dfl_inhibit_ss_mask |= 1 << ss->id;  in cgroup_init()
6137 			cgrp_dfl_threaded_ss_mask |= 1 << ss->id;  in cgroup_init()
6186 void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen)  in cgroup_path_from_kernfs_id()  argument
6190 	kn = kernfs_find_and_get_node_by_id(cgrp_dfl_root.kf_root, id);  in cgroup_path_from_kernfs_id()
6203 struct cgroup *cgroup_get_from_id(u64 id)  in cgroup_get_from_id()  argument
6208 	kn = kernfs_find_and_get_node_by_id(cgrp_dfl_root.kf_root, id);  in cgroup_get_from_id()
6391 	struct super_block *sb;  in cgroup_css_set_fork()  local
6414 	sb = f->f_path.dentry->d_sb;  in cgroup_css_set_fork()
6433 	ret = cgroup_may_write(dst_cgrp, sb);  in cgroup_css_set_fork()
6451 	ret = cgroup_attach_permissions(cset->dfl_cgrp, dst_cgrp, sb,  in cgroup_css_set_fork()
6815 struct cgroup_subsys_state *css_from_id(int id, struct cgroup_subsys *ss)  in css_from_id()  argument
6818 	return idr_find(&ss->css_idr, id);  in css_from_id()
7064 	.attrs = cgroup_sysfs_attrs,