ldc_mem_unmap
(void) ldc_mem_unmap(dringp->mhdl);
(void) ldc_mem_unmap(task->mhdl);
rv = ldc_mem_unmap(task->mhdl);
status = ldc_mem_unmap(task->mhdl);
(void) ldc_mem_unmap(ldcp->tx_data_handle);
(void) ldc_mem_unmap(dp->data_handle);
int ldc_mem_unmap(ldc_mem_handle_t mhandle);