xen/sys/hypervisor: change writable_pt to features

HYPERVISOR_ATTR_RO(pagesize);

/* eventually there will be several more features to export */

static ssize_t xen_feature_show(int index, char *buffer)

{

	int ret = -ENOMEM;

	struct xen_feature_info *info;

	ssize_t ret;

	struct xen_feature_info info;

	info = kmalloc(sizeof(struct xen_feature_info), GFP_KERNEL);

	if (info) {

		info->submap_idx = index;

		ret = HYPERVISOR_xen_version(XENVER_get_features, info);

	info.submap_idx = index;

	ret = HYPERVISOR_xen_version(XENVER_get_features, &info);

	if (!ret)

			ret = sprintf(buffer, "%d\n", info->submap);

		kfree(info);

	}

		ret = sprintf(buffer, "%08x", info.submap);

	return ret;

}

static ssize_t writable_pt_show(struct hyp_sysfs_attr *attr, char *buffer)

static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer)

{

	return xen_feature_show(XENFEAT_writable_page_tables, buffer);

	ssize_t len;

	int i;

	len = 0;

	for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {

		int ret = xen_feature_show(i, buffer + len);

		if (ret < 0) {

			if (len == 0)

				len = ret;

			break;

		}

		len += ret;

	}

	if (len > 0)

		buffer[len++] = '\n';

	return len;

}

HYPERVISOR_ATTR_RO(writable_pt);

HYPERVISOR_ATTR_RO(features);

static struct attribute *xen_properties_attrs[] = {

	&capabilities_attr.attr,

	&changeset_attr.attr,

	&virtual_start_attr.attr,

	&pagesize_attr.attr,

	&writable_pt_attr.attr,

	&features_attr.attr,

	NULL

};