Rick Macklem b5cb66df25 Add acquisition of a reference count on nfsv4root_lock to the
nfsd_recalldelegation() function, since this function is called
by nfsd threads when they are handling NFSv2 or NFSv3 RPCs, where
no reference count would have been acquired.

MFC after:	2 weeks
2010-08-28 23:50:09 +00:00
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