Copy from sparc64/pmap.c rev 1.64 (Retrofit changes from i386/pmap.c rev 1.328-1.331.) but for uarea only.  We still have our own broken kstack code here.
Copy from sparc64/pmap.c rev 1.64 (Retrofit changes from i386/pmap.c
rev 1.328-1.331.) but for uarea only.  We still have our own broken
kstack code here.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase