if (p == NULL)
if (p == NULL && mddev->raid_disks == 0)
level_show(mddev_t *mddev, char *page){	mdk_personality_t *p = mddev->pers;	if (p == NULL)		return 0;	if (mddev->level >= 0)		return sprintf(page, "RAID-%d\n", mddev->level);	else		return sprintf(page, "%s\n", p->name);}