* 'cpus' is removed, then call this routine to rebuild the
* scheduler's dynamic sched domains.
*
- * Call with cpuset_mutex held. Takes get_online_cpus().
+ * Call with cpuset_mutex held. Takes cpus_read_lock().
*/
static void rebuild_sched_domains_locked(void)
{
void rebuild_sched_domains(void)
{
- get_online_cpus();
+ cpus_read_lock();
percpu_down_write(&cpuset_rwsem);
rebuild_sched_domains_locked();
percpu_up_write(&cpuset_rwsem);
- put_online_cpus();
+ cpus_read_unlock();
}
/**
cpuset_filetype_t type = cft->private;
int retval = 0;
- get_online_cpus();
+ cpus_read_lock();
percpu_down_write(&cpuset_rwsem);
if (!is_cpuset_online(cs)) {
retval = -ENODEV;
}
out_unlock:
percpu_up_write(&cpuset_rwsem);
- put_online_cpus();
+ cpus_read_unlock();
return retval;
}
cpuset_filetype_t type = cft->private;
int retval = -ENODEV;
- get_online_cpus();
+ cpus_read_lock();
percpu_down_write(&cpuset_rwsem);
if (!is_cpuset_online(cs))
goto out_unlock;
}
out_unlock:
percpu_up_write(&cpuset_rwsem);
- put_online_cpus();
+ cpus_read_unlock();
return retval;
}
kernfs_break_active_protection(of->kn);
flush_work(&cpuset_hotplug_work);
- get_online_cpus();
+ cpus_read_lock();
percpu_down_write(&cpuset_rwsem);
if (!is_cpuset_online(cs))
goto out_unlock;
free_cpuset(trialcs);
out_unlock:
percpu_up_write(&cpuset_rwsem);
- put_online_cpus();
+ cpus_read_unlock();
kernfs_unbreak_active_protection(of->kn);
css_put(&cs->css);
flush_workqueue(cpuset_migrate_mm_wq);
return -EINVAL;
css_get(&cs->css);
- get_online_cpus();
+ cpus_read_lock();
percpu_down_write(&cpuset_rwsem);
if (!is_cpuset_online(cs))
goto out_unlock;
retval = update_prstate(cs, val);
out_unlock:
percpu_up_write(&cpuset_rwsem);
- put_online_cpus();
+ cpus_read_unlock();
css_put(&cs->css);
return retval ?: nbytes;
}
if (!parent)
return 0;
- get_online_cpus();
+ cpus_read_lock();
percpu_down_write(&cpuset_rwsem);
set_bit(CS_ONLINE, &cs->flags);
spin_unlock_irq(&callback_lock);
out_unlock:
percpu_up_write(&cpuset_rwsem);
- put_online_cpus();
+ cpus_read_unlock();
return 0;
}
{
struct cpuset *cs = css_cs(css);
- get_online_cpus();
+ cpus_read_lock();
percpu_down_write(&cpuset_rwsem);
if (is_partition_root(cs))
clear_bit(CS_ONLINE, &cs->flags);
percpu_up_write(&cpuset_rwsem);
- put_online_cpus();
+ cpus_read_unlock();
}
static void cpuset_css_free(struct cgroup_subsys_state *css)