static ssize_t wq_cpumask_store(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t count)
{
	struct workqueue_struct *wq = dev_to_wq(dev);
	struct workqueue_attrs *attrs;
	int ret = -ENOMEM;

	apply_wqattrs_lock();

	attrs = wq_sysfs_prep_attrs(wq);
	if (!attrs)
		goto out_unlock;

	ret = cpumask_parse(buf, attrs->cpumask);
	if (!ret)
		ret = apply_workqueue_attrs_locked(wq, attrs);

out_unlock:
	apply_wqattrs_unlock();
	free_workqueue_attrs(attrs);
	return ret ?: count;
}
Unknown