How to know the configuration of kernel

[Jsahambi <jsahambi@iitg.ernet.in>]

Is there any method to know what modules are compiled into the kernel on
the Debian machine.

I can reframe the question: If I install the kernel-sourse and run "make
xconfig", how do i load the configuration of the existing kernel, so
that I can know what modules are compiled into the kernel and baased on
that I can add more if I want.

Thanks

--
  J. S. Sahambi