K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2016-09-22T08:59:58.028864Z
K 7
svn:log
V 185
MFC r305593:
There is no need to upgrade the last dvp lock on lookups for modifying
operations.  Instead of upgrading, assert that the lock is exclusive.
Explain the cause in comments.

END