MD_DISK_ROLE_JOURNAL
role == MD_DISK_ROLE_JOURNAL) {
le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL))
le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL))
case MD_DISK_ROLE_JOURNAL: /* journal device */
sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL);