kernel version:3.4.3-1.fc17.x86_64 I had already posted this problem several times and some specialist gave me some suggestions, thanks to them. the problems is still not solved even though I change my fedora 16 to fedora 17. After I install ncurses-devel,copy a working kernel configuration of your linux distro to the top level of the wireless-testing tree ,I used the command menuconfig, but I did not change any setting of the menuconfig, just the default value, and then , "make modules': and it comes with: In file included from drivers/net/wireless/at76c50x-usb.c:46:0: include/net/mac80211.h: In function ‘ieee80211_tx_info_clear_status’: include/net/mac80211.h:638:2: error: size of unnamed array is negative include/net/mac80211.h:643:2: error: size of unnamed array is negative make[3]: *** [drivers/net/wireless/at76c50x-usb.o] Error 1 make[2]: *** [drivers/net/wireless] Error 2 make[1]: *** [drivers/net] Error 2 make: *** [drivers] Error 2 The content in line 639 and 644 are all:like BUILD_BUG_ON(offsetof(struct XXXXXXX) !=XXX); If I comment this line out, it "seems" this problem fixed. And I tried to make modules again, the same error(BUILD_BUG_ON (offsetof(struct XXXXXXX) !=XXX);) came out but different file, different lines.And repeatedly. I do not think there are so many error that need to be fixed since I just change a few lines of codes which seems unrelated to theses errors. I really do not know what to do.Anyone can help me? Thank you so much. -- 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