preferable way to control kernel module

[Sergey Uvarov]

Hello hackers,

I'm writing a kernel module for my own needs. AFAIK the following 
methods could be used:

1) allocate not used system call with help of SYSCALL_MODULE macro

2) allocate proprieatry oid via SYSCTL_OID(OID_AUTO) and write an 
appropriate sysctl handler(s)

3) add a file in /dev and use ioctl(2) call

What is a preferable way to control my module?

Thanks in advance,
	Sergey.