* - must call this function with the ns lock held once */
int ldlm_process_extent_lock(struct ldlm_lock *lock, int *flags, int first_enq,
ldlm_error_t *err, struct list_head *work_list)
* - must call this function with the ns lock held once */
int ldlm_process_extent_lock(struct ldlm_lock *lock, int *flags, int first_enq,
ldlm_error_t *err, struct list_head *work_list)