 - Since we don't hold a usecount in pfs_exit we have to get a holdcnt    prior to calling vgone() to prevent any races.
 - Since we don't hold a usecount in pfs_exit we have to get a holdcnt
   prior to calling vgone() to prevent any races.

Sponsored by:	Isilon Systems, Inc.
Approved by:	re (vfs blanket)

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