CC      net/ethernet/eth.o
  LD      net/ethernet/built-in.o
  LD      net/ieee80211/built-in.o
make[2]: *** No rule to make target `net/ieee80211/ieee80211_module.o', needed by `net/ieee80211/ieee80211.o'.  Stop.
make[1]: *** [net/ieee80211] Error 2
make: *** [net] Error 2