Hello, The build error occurs by compat-wireless-2011-10-30. My kernel is 2.6.27. LD /home/miyabi/test/compat-wireless/compat-wireless-2011-10-30/drivers/net/ethernet/atheros/atl1c/built-in.o CC [M] /home/miyabi/test/compat-wireless/compat-wireless-2011-10-30/drivers/net/ethernet/atheros/atl1c/atl1c_main.o /home/miyabi/test/compat-wireless/compat-wireless-2011-10-30/drivers/net/ethernet/atheros/atl1c/atl1c_main.c: In function 'atl1c_tx_map': /home/miyabi/test/compat-wireless/compat-wireless-2011-10-30/drivers/net/ethernet/atheros/atl1c/atl1c_main.c:2199: error: implicit declaration of function 'skb_frag_size' /home/miyabi/test/compat-wireless/compat-wireless-2011-10-30/drivers/net/ethernet/atheros/atl1c/atl1c_main.c: At top level: /home/miyabi/test/compat-wireless/compat-wireless-2011-10-30/drivers/net/ethernet/atheros/atl1c/atl1c_main.c:2926: warning: useless storage class specifier in empty declaration /home/miyabi/test/compat-wireless/compat-wireless-2011-10-30/drivers/net/ethernet/atheros/atl1c/atl1c_main.c:2926: warning: empty declaration make[4]: *** [/home/miyabi/test/compat-wireless/compat-wireless-2011-10-30/drivers/net/ethernet/atheros/atl1c/atl1c_main.o] Error 1 make[3]: *** [/home/miyabi/test/compat-wireless/compat-wireless-2011-10-30/drivers/net/ethernet/atheros/atl1c] Error 2 make[2]: *** [/home/miyabi/test/compat-wireless/compat-wireless-2011-10-30/drivers/net/ethernet/atheros] Error 2 make[1]: *** [_module_/home/miyabi/test/compat-wireless/compat-wireless-2011-10-30] Error 2 make[1]: Leaving directory `/usr/src/kernels/2.6.27-71vl5-x86_64' make: *** [modules] Error 2 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html