742 static void css_set_move_task(struct task_struct *task,  in css_set_move_task()  argument
754 		WARN_ON_ONCE(list_empty(&task->cg_list));  in css_set_move_task()
765 			if (it->task_pos == &task->cg_list)  in css_set_move_task()
768 		list_del_init(&task->cg_list);  in css_set_move_task()
772 		WARN_ON_ONCE(!list_empty(&task->cg_list));  in css_set_move_task()
782 		WARN_ON_ONCE(task->flags & PF_EXITING);  in css_set_move_task()
784 		rcu_assign_pointer(task->cgroups, to_cset);  in css_set_move_task()
785 		list_add_tail(&task->cg_list, use_mg_tasks ? &to_cset->mg_tasks :  in css_set_move_task()
1286 static struct cgroup *task_cgroup_from_root(struct task_struct *task,  in task_cgroup_from_root()  argument
1294 	return cset_cgroup_from_root(task_css_set(task), root);  in task_cgroup_from_root()
2366 int task_cgroup_path(struct task_struct *task, char *buf, size_t buflen)  in task_cgroup_path()  argument
2379 		cgrp = task_cgroup_from_root(task, root);  in task_cgroup_path()
2433 static void cgroup_taskset_add(struct task_struct *task,  in cgroup_taskset_add()  argument
2441 	if (task->flags & PF_EXITING)  in cgroup_taskset_add()
2445 	if (list_empty(&task->cg_list))  in cgroup_taskset_add()
2448 	cset = task_css_set(task);  in cgroup_taskset_add()
2452 	list_move_tail(&task->cg_list, &cset->mg_tasks);  in cgroup_taskset_add()
2488 	struct task_struct *task = tset->cur_task;  in cgroup_taskset_next()  local
2491 		if (!task)  in cgroup_taskset_next()
2492 			task = list_first_entry(&cset->mg_tasks,  in cgroup_taskset_next()
2495 			task = list_next_entry(task, cg_list);  in cgroup_taskset_next()
2497 		if (&task->cg_list != &cset->mg_tasks) {  in cgroup_taskset_next()
2499 			tset->cur_task = task;  in cgroup_taskset_next()
2512 			return task;  in cgroup_taskset_next()
2516 		task = NULL;  in cgroup_taskset_next()
2536 	struct task_struct *task, *tmp_task;  in cgroup_taskset_migrate()  local
2563 		list_for_each_entry_safe(task, tmp_task, &cset->mg_tasks, cg_list) {  in cgroup_taskset_migrate()
2564 			struct css_set *from_cset = task_css_set(task);  in cgroup_taskset_migrate()
2568 			css_set_move_task(task, from_cset, to_cset, true);  in cgroup_taskset_migrate()
2780 	struct task_struct *task;  in cgroup_migrate()  local
2789 	task = leader;  in cgroup_migrate()
2791 		cgroup_taskset_add(task, &tset);  in cgroup_migrate()
2794 	} while_each_thread(leader, task);  in cgroup_migrate()
2813 	struct task_struct *task;  in cgroup_attach_task()  local
2822 	task = leader;  in cgroup_attach_task()
2824 		cgroup_migrate_add_src(task_css_set(task), dst_cgrp,  in cgroup_attach_task()
2828 	} while_each_thread(leader, task);  in cgroup_attach_task()
2845 static int cgroup_procs_write_permission(struct task_struct *task,  in cgroup_procs_write_permission()  argument
2850 	const struct cred *tcred = get_task_cred(task);  in cgroup_procs_write_permission()
2869 		cgrp = task_cgroup_from_root(task, &cgrp_dfl_root);  in cgroup_procs_write_permission()
3109 		struct task_struct *task, *ntask;  in cgroup_update_dfl_csses()  local
3116 		list_for_each_entry_safe(task, ntask, &src_cset->tasks, cg_list)  in cgroup_update_dfl_csses()
3117 			cgroup_taskset_add(task, &tset);  in cgroup_update_dfl_csses()
4364 	struct task_struct *task;  in cgroup_transfer_tasks()  local
4390 		task = css_task_iter_next(&it);  in cgroup_transfer_tasks()
4391 		if (task)  in cgroup_transfer_tasks()
4392 			get_task_struct(task);  in cgroup_transfer_tasks()
4395 		if (task) {  in cgroup_transfer_tasks()
4396 			ret = cgroup_migrate(task, false, to->root);  in cgroup_transfer_tasks()
4398 				trace_cgroup_transfer_tasks(to, task, false);  in cgroup_transfer_tasks()
4399 			put_task_struct(task);  in cgroup_transfer_tasks()
4401 	} while (task && !ret);  in cgroup_transfer_tasks()
6051 void cgroup_free(struct task_struct *task)  in cgroup_free()  argument
6053 	struct css_set *cset = task_css_set(task);  in cgroup_free()
6058 		ss->free(task);  in cgroup_free()
6470 static struct ns_common *cgroupns_get(struct task_struct *task)  in cgroupns_get()  argument
6475 	task_lock(task);  in cgroupns_get()
6476 	nsproxy = task->nsproxy;  in cgroupns_get()
6481 	task_unlock(task);  in cgroupns_get()
6600 		struct task_struct *task;  in cgroup_css_links_read()  local
6605 		list_for_each_entry(task, &cset->tasks, cg_list) {  in cgroup_css_links_read()
6608 			seq_printf(seq, "  task %d\n", task_pid_vnr(task));  in cgroup_css_links_read()
6611 		list_for_each_entry(task, &cset->mg_tasks, cg_list) {  in cgroup_css_links_read()
6614 			seq_printf(seq, "  task %d\n", task_pid_vnr(task));  in cgroup_css_links_read()