Eliminate a pointless call to pmap_clear_reference() from vm_pageout_scan(). If the page belongs to an object with a reference count of zero, then it can't have any managed mappings on which to clear a reference bit.
Eliminate a pointless call to pmap_clear_reference() from vm_pageout_scan().
If the page belongs to an object with a reference count of zero, then it
can't have any managed mappings on which to clear a reference bit.

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