For testing SystemTap, if the Kernel Module is required attribute, we should set it as a required field, so file a bug to trace it.
Fixed by: http://git.yoctoproject.org/cgit.cgi/eclipse-poky/commit/?id=9fbadf22642c57036ff6e4f049a244e0b52a35cc
Verify it, fixed with tree poky-contrib, branch stage/master_under_test, commitID f5eb96062f71ff8ccc0e91df6e01aee56b70b0d9