Apparently there are still people out there who care about this old architecture. They probably care about dusty versions of Postgres too, so back-patch to all supported branches.
David Carlier (from a patch being carried by OpenBSD packagers)
f3bd00c016 Add support for Motorola 88K to s_lock.h.
src/include/storage/s_lock.h | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)