unmap_max_desc   4463 drivers/scsi/scsi_debug.c module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
unmap_max_desc   4523 drivers/scsi/scsi_debug.c MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");