TCP as a module

Hi Currently TCP is statically linked to the kernel. How can I make it a loadable module? I need to modify TCP (tcp_input.c and tcp_output.c). It would be easier for my development if it's just another module (I don't need to restart every time). I changed the *fs_initcall(inet_init)* to *module_init(inet_init)*, but doesn't seem to help. Looking forward to your suggestions. Many thanks Tamim