> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/man/man9/bus_child_deleted.9.md).

# BUS\_CHILD\_DELETED.9

`BUS_CHILD_DELETED` — 通知总线设备子设备将被删除

## 名称

`BUS_CHILD_DELETED`

## 概要

```c
#include <sys/param.h>
#include <sys/bus.h>
```

```c
void
BUS_CHILD_DELETED(device_t dev, device_t child)
```

## 描述

`BUS_CHILD_DELETED` 方法在设备被删除时由 new-bus 框架调用。总线驱动程序可以实现此方法，以释放与设备关联的总线专用资源（如实例变量）。

## 参见

[BUS\_ADD\_CHILD(9)](/man/man9/bus_add_child.9.md), [device(9)](/man/man9/device.9.md)

## 历史

`BUS_CHILD_DELETED` 方法首次出现于 FreeBSD 10.0。


---

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