K 10 svn:author V 3 alc K 8 svn:date V 27 2012-10-06T19:05:50.242762Z K 7 svn:log V 332 Correct two pessimizations in pmap_extract_and_hold(). Test the PTE for having PTE_RO set instead of PTE_D. This avoids some unnecessary failures by pmap_extract_and_hold() that will have to be handled by a call to vm_fault_hold(). Testing the PTE for both being non-zero and having PTE_V set is redundant. The latter suffices. END