Is there any way to print list of runnable tasks on the per cpu runqueue, without using for_each_process_thread()

Question

Note: cat /proc/sched_debug //It prints percpu runque list

source path: kernel/sched/debug.c There is a way which available in Linux kernel to print runque task list as below:

static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
{
    struct task_struct *g, *p;

    SEQ_printf(m, "\n");
    SEQ_printf(m, "runnable tasks:\n");
    SEQ_printf(m, " S            task   PID         tree-key  switches  prio"
           "     wait-time             sum-exec        sum-sleep\n");
    SEQ_printf(m, "-------------------------------------------------------"
           "------------------------------------------------------\n");

    rcu_read_lock();
    for_each_process_thread(g, p) {
        if (task_cpu(p) != rq_cpu)
            continue;

        print_task(m, rq, p);
    }
    rcu_read_unlock();
}

But, to print each runqueue task list it unnecessary traversing all the task's in the system and checking is this task on required cpu(rq_cpu). So, is there a way by which we can print runque task list, I know as each cpu runqueue has multiple sub runqueue's(cfs_rq,rt_rq,dl_rq) which all are not in doubly linked list fashion, some are mapped using rb-tree fashion. Can someone give provide any inputs or other ways by which we can display per cpu task list??