Comment 3 for bug 130665

I can confirm this error on the latest -rt kernel version 2.6.22-10:

spawn@sincity:~$ dmesg | grep ath
[ 31.169241] ath_pci: Unknown symbol _ath_hal_attach
[ 31.169330] ath_pci: Unknown symbol ath_hal_process_noisefloor
[ 31.169612] ath_pci: Unknown symbol ath_hal_computetxtime
[ 31.169861] ath_pci: Unknown symbol ath_hal_mhz2ieee
[ 31.169955] ath_pci: Unknown symbol ath_hal_detach
[ 31.170370] ath_pci: Unknown symbol ath_hal_probe
[ 31.170903] ath_pci: Unknown symbol ath_hal_init_channels
[ 31.171107] ath_pci: Unknown symbol ath_hal_getwirelessmodes

Modules are loaded normally on -generic kernel