Building an rpm for a kernel version

[Dan Track]

Hi

Would anyone know what the macro is to define which kernel version is
being run. Basically I want to build a module but I need the
kernel-source to be the same as the currently installed and running
kernel. I put in a "BuildPreReq: kernel-source" entry but it I can't
verify whether the currently installed kernel-source version is the
same as the currently running kernel version.

Thanks for your help

Dan