UPD     include/linux/compile.h
  CC      init/version.o
  LD      init/built-in.o
  LD      vmlinux
  SYSMAP  System.map
  Building modules, stage 2.
  MODPOST 62 modules
ERROR: "udp4_unregister_esp_rcvencap" [net/ipsec/ipsec.ko] undefined!
ERROR: "udp4_register_esp_rcvencap" [net/ipsec/ipsec.ko] undefined!
make[6]: *** [__modpost] Error 1
make[5]: *** [modules] Error 2
make[5]: Leaving directory `/home/weedy/openwrt/wl-500gP/kamikaze/build_dir/linux-brcm47xx/linux-2.6.23.16'
make[4]: *** [/home/weedy/openwrt/wl-500gP/kamikaze/build_dir/linux-brcm47xx/linux-2.6.23.16/.image] Error 2
make[3]: *** [install] Error 2
make[2]: *** [target/linux/install] Error 2
make[1]: *** [/home/weedy/openwrt/wl-500gP/kamikaze/staging_dir/mipsel/stamp/.target_install] Error 2
make -r world: build failed. Please re-run make with V=99 to see what's going on
make: *** [world] Error 1
weedy@kamo-chan ~/openwrt/wl-500gP/kamikaze $ grep -R 'udp4_unregister_esp_rcvencap' /home/weedy/openwrt/wl-500gP/kamikaze/build_dir/linux-brcm47xx/linux-2.6.23.16/
/home/weedy/openwrt/wl-500gP/kamikaze/build_dir/linux-brcm47xx/linux-2.6.23.16/include/net/xfrmudp.h:extern int udp4_unregister_esp_rcvencap(xfrm4_rcv_encap_t func);
/home/weedy/openwrt/wl-500gP/kamikaze/build_dir/linux-brcm47xx/linux-2.6.23.16/net/ipv4/xfrm4_input.c:int udp4_unregister_esp_rcvencap(xfrm4_rcv_encap_t func)
/home/weedy/openwrt/wl-500gP/kamikaze/build_dir/linux-brcm47xx/linux-2.6.23.16/net/ipv4/xfrm4_input.c:EXPORT_SYMBOL(udp4_unregister_esp_rcvencap);
Binary file /home/weedy/openwrt/wl-500gP/kamikaze/build_dir/linux-brcm47xx/linux-2.6.23.16/net/ipsec/ipsec.o matches
/home/weedy/openwrt/wl-500gP/kamikaze/build_dir/linux-brcm47xx/linux-2.6.23.16/net/ipsec/ipsec_init.c:  if(udp4_unregister_esp_rcvencap(klips_old_encap) < 0) {
Binary file /home/weedy/openwrt/wl-500gP/kamikaze/build_dir/linux-brcm47xx/linux-2.6.23.16/net/ipsec/ipsec_init.o matches
Binary file /home/weedy/openwrt/wl-500gP/kamikaze/build_dir/linux-brcm47xx/linux-2.6.23.16/net/ipsec/ipsec.ko matches