kernel-source from home:awissu:kernel-rt project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:awissu:kernel-rt/openSUSE_Tumbleweed/home:awissu:kernel-rt.repo zypper refresh zypper install kernel-source