hostap0.6.4 + ath5k

Hi,all
I deployed hostap0.6.4 + ath5k, and got 2 problems.

My env is: kernel 2.6.26, hostap 0.6.4
compat-wireless-old-2008-10-06.tar.bz2
libnl-1.0-pre8.tar.tar

1. when make wireless souce tree, there are several
WARNINGs:
  Building modules, stage 2.

  MODPOST 39 modules
WARNING: "ieee80211_hdrlen"
[/home/wangyue/VLAN_WPA_ath5k/compat-wireless-2.6-old/drivers/net/wireless/iwlwifi/iwlcore.ko]
undefined!
WARNING: "ieee80211_hdrlen"
[/home/wangyue/VLAN_WPA_ath5k/compat-wireless-2.6-old/drivers/net/wireless/iwlwifi/iwl3945.ko]
undefined!
WARNING: "ieee80211_hdrlen"
[/home/wangyue/VLAN_WPA_ath5k/compat-wireless-2.6-old/drivers/net/wireless/b43legacy/b43legacy.ko]
undefined!
WARNING: "ieee80211_hdrlen"
[/home/wangyue/VLAN_WPA_ath5k/compat-wireless-2.6-old/drivers/net/wireless/b43/b43.ko]
undefined!
WARNING: "ieee80211_hdrlen"
[/home/wangyue/VLAN_WPA_ath5k/compat-wireless-2.6-old/drivers/net/wireless/ath5k/ath5k.ko]
undefined!
WARNING: "ieee80211_hdrlen"
[/home/wangyue/VLAN_WPA_ath5k/compat-wireless-2.6-old/drivers/net/wireless/adm8211.ko]
undefined!