Re: 回复 : about devfs_free

In reply to: YU SHANG : "�ظ�: about devfs_free"
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From: Konstantin Belousov <kostikbel_at_gmail.com>
Date: Sun, 22 Oct 2023 10:29:53 UTC

On Sun, Oct 22, 2023 at 10:10:52AM +0000, YU SHANG wrote:
> I’m sorry. I’ve found it will be detached from cdevp_list in devfs_revoke.
Drivers should not touch this level of interfaces.
Read make_dev(9)/destroy_dev(9) man pages about management of cdevs from the
driver side.

> 
> 
> 发件人: YU SHANG<mailto:yushang@outlook.com>
> 发送时间: 2023年10月19日 18:45
> 收件人: freebsd-drivers@freebsd.org<mailto:freebsd-drivers@freebsd.org>
> 主题: about devfs_free
> 
> Hi guys,
> I am a newbie in FreeBSD driver development. I found that devfs_free(sys\fs\devfs\devfs_devs.c) does not detach the cdev_priv from the cdevp_list before free it. cdev_priv is inserted into cdevp_list in devfs_create(sys\fs\devfs\devfs_devs.c). What I have missed? Many thank.
> 
>