The 'o_handle' field is a 'lustre_handle' (See
<<struct-lustre-handle>>). In this context it represents a lock. In
-most cases it will be 0. In an OST_PUNCH RPC (See <<truncate-rpcs>>) it
-may refer to a lock on the resource being modified that was previously
-acquired, though a lock is not required for that operation. The effect
-is to extend the timeout for that lock.
+most cases it will be 0. In an OST_PUNCH RPC (See <<truncate-rpcs>>)
+it may have a (non-zero) value. if so that 'lustre_handle' refers to a
+lock on the resource being modified, and that had been previously
+acquired (a lock is not required for that operation). The effect is to
+extend the timeout for that lock.
****