ath_rateioctl_rt
struct ath_rateioctl_rt *tv;
sizeof(struct ath_rateioctl_rt) +
tv = malloc(sizeof(struct ath_rateioctl_rt), M_TEMP,
av.tlv_len = sizeof(struct ath_rateioctl_rt);
error = copyout(tv, rs->buf + o, sizeof(struct ath_rateioctl_rt));
o += sizeof(struct ath_rateioctl_rt);