中缺少Ubuntu proc_root_driver

I am trying to compile a kernel module in Ubuntu 10.04 with kernel 2.6.35-22 and it is complaining about proc_root_driver missing. I did some searching and I found that is supposed to define this but in my version of the linux-headers, it isn't defined. Is there another global variable I am supposed to use in its place or is there a way that I can define it somewhere so that the kernel module can compile?I am trying to compile a kernel module in Ubunt