because sparc has variable pagesize, ctob() varies between machines, and we need uvm/uvm_extern.h to get at uvmexp.  oops.
because sparc has variable pagesize, ctob() varies between machines, and we
need uvm/uvm_extern.h to get at uvmexp.  oops.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars