SpecC's questions

I am trying to build my own module for usbhid.ko, but after I compiled, I can't load the module. dmesg says no symbol version for module_layout. I am wondering what is the problem? I have already used the kernel source provided by Ubuntu and I have also make sure the kernel version is the same.

I am trying to monitor the USB traffic in Ubuntu 10.0.4. According to many websites, the usbmon is already included in the kernel, but typing modprobe usbmon. It will return "Can't find module".

Do I have to recompile the usbmon module?