sudo make -C /lib/modules/`uname -r`/build/ M=`pwd` modules
make: Entering directory `/usr/src/linux-headers-2.6.24-21-generic'
  CC [M]  /home/damn/acx-20070101/common.o
/home/damn/acx-20070101/common.c: In function ‘acx_l_rxmonitor’:
/home/damn/acx-20070101/common.c:2757: error: ‘struct sk_buff’ has no member named ‘mac’
make[1]: *** [/home/damn/acx-20070101/common.o] Error 1
make: *** [_module_/home/damn/acx-20070101] Error 2
make: Leaving directory `/usr/src/linux-headers-2.6.24-21-generic'