Stop leaking a lock.  This used to cause a propagate_priority() page fault when setting syncdev and syncpeer.
Stop leaking a lock.  This used to cause a propagate_priority() page fault
when setting syncdev and syncpeer.

Reported by:	Dominic Marks

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