By the way, a simple diagnostic for whether any particular version of systemtap has been ported to a kernel is to run
% stap -V Systemtap translator/driver (version 4.1/0.174, rpm 4.1-0.20190327git2ede4cecb20c.fc28) Copyright (C) 2005-2019 Red Hat, Inc. and others This is free software; see the source for copying conditions. tested kernel versions: 2.6.18 ... 5.0-rc3 enabled features: AVAHI BOOST_STRING_REF DYNINST BPF JAVA PYTHON2 PYTHON3 LIBRPM LIBSQLITE3 LIBVIRT LIBXML2 NLS NSS READLINE
Note the "tested kernel versions" line. If your kernel is newer than that, you'll need to switch to a fresher upstream systemtap version.
By the way, a simple diagnostic for whether any particular version of systemtap has been ported to a kernel is to run
% stap -V it2ede4cecb20c. fc28)
Systemtap translator/driver (version 4.1/0.174, rpm 4.1-0.20190327g
Copyright (C) 2005-2019 Red Hat, Inc. and others
This is free software; see the source for copying conditions.
tested kernel versions: 2.6.18 ... 5.0-rc3
enabled features: AVAHI BOOST_STRING_REF DYNINST BPF JAVA PYTHON2 PYTHON3 LIBRPM LIBSQLITE3 LIBVIRT LIBXML2 NLS NSS READLINE
Note the "tested kernel versions" line. If your kernel is newer than that, you'll need to switch to a fresher upstream systemtap version.