Listing 5. Finding a CPU to Which to Push a Task

int cpupri_find(struct cpupri      *cp,
                struct task_struct *p,
                cpumask_t          *lowest_mask)
{
...
    for_each_cpupri_active(cp->pri_active, idx) {
        struct cpupri_vec *vec  = &cp->pri_to_cpu[idx];
        cpumask_t mask;

        if (idx >= task_pri)
            break;

        cpus_and(mask, p->cpus_allowed, vec->mask);

        if (cpus_empty(mask))
            continue;
        *lowest_mask = mask;
        return 1;
    }
    return 0;
}