#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 39)
freq = ieee80211_channel_to_frequency(notif_bss_info->channel,(notif_bss_info->channel <= CH_MAX_2G_CHANNEL) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ);
#else
freq = ieee80211_channel_to_frequency(notif_bss_info->channel,(notif_bss_info->channel <= CH_MAX_2G_CHANNEL) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ);
#endif