--- Comment #20 from Michal Kubeček email@example.com --- (In reply to Martin Wilck from comment #19)
I didn't make myself clear. That "real KMP" I talked about would not trigger the rebuild. It would rather rely on KABI, like real KMPs do. If the KABI changes, the "real KMP" would need to be rebuilt. I'd hope that wouldn't happen too often, at least not on Leap.
We do not check kABI in Leap kernel branches like we do in SLE but as openSUSE-15.2 shares the codebase (same tarball and patches) with SLE15-SP2, the risk of breaking kABI in a way that would cause trouble is relatively low. It would have to be a kABI breakage that would only manifest in parts of the code which are built in openSUSE-15.2 but not SLE15-SP2.