DRBD_A_DEVICE_STATISTICS_DEV_SIZE
nla = ntb[DRBD_A_DEVICE_STATISTICS_DEV_SIZE];
if (nla_put_u64_64bit(skb, DRBD_A_DEVICE_STATISTICS_DEV_SIZE, s->dev_size, 0))
[DRBD_A_DEVICE_STATISTICS_DEV_SIZE] = { .type = NLA_U64, },