Wierd Problem with Current Task Struct

Greetings

I am currently having a problem with the "current" task struct in the
2.4.18-4GB SUSE80 Kernel ... I am writing a kernel module that is calling down through a system call... The system call is getting the PID and FS pointer from the Current task struct, but the FS pointer is NULL and the PID is 0 .... Is this normal? Should current->fs ever be NULL? I haven't noticed anyone checking it in the Linux Kernel, so I think it is assumed to always be a good value... Can anyone shed light on this?

Thanks in advance....
Tom