 - Only the xlock holder should be calling VOP_LOCK on a vp once VI_XLOCK    has been set.  Assert that this is the case so that we catch filesystems    who are using naked VOP_LOCKs in illegal cases.
 - Only the xlock holder should be calling VOP_LOCK on a vp once VI_XLOCK
   has been set.  Assert that this is the case so that we catch filesystems
   who are using naked VOP_LOCKs in illegal cases.

Sponsored by:	Isilon Systems, Inc.

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