null_queue_mode_param_ops 128 drivers/block/null_blk_main.c static const struct kernel_param_ops null_queue_mode_param_ops = { null_queue_mode_param_ops 133 drivers/block/null_blk_main.c device_param_cb(queue_mode, &null_queue_mode_param_ops, &g_queue_mode, 0444);