cdev_device_del(9)

💖 NAME 💖

okay bestie, this is the cdev_device_del(9) page from the Kernel API Manual, and it is literally the inverse of cdev_device_add — no cap. 💅✨

cdev_device_del — inverse of cdev_device_add 🫶

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✨ SYNOPSIS ✨

void cdev_device_del (struct cdev *cdev , struct device *dev );

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🎀 ARGUMENTS 🎀

• cdev — the cdev structure 💖
• dev — the device structure ✨

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🦋 DESCRIPTION 🦋

so like, cdev_device_del is a helper function that calls cdev_del and device_del. that's the whole vibe. 🫶

It should be used whenever cdev_device_add is used — like, they're a matching set, iykyk. 👑

If dev->devt is not set, it will not remove the cdev and will be equivalent to device_del. periodt. 💅

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🚨 NOTE 🚨

okay, important guarantee time: this guarantees that associated sysfs callbacks are not running or runnable. iconic. ✨

but bestie, plot twist 😭: any cdevs already open will remain, and their fops will still be callable even after this function returns. so don't think this closes absolutely everything — fr fr.

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🌈 SEE ALSO 🌈

Kernel file: ./fs/char_dev.c 🧚

the whole related squad is right here:

• register_chrdev_region(9)
• alloc_chrdev_region(9)
• __register_chrdev(9)
• unregister_chrdev_region(9)
• __unregister_chrdev(9)
• cdev_add(9)
• cdev_set_parent(9)
• cdev_device_add(9)
• cdev_del(9)
• cdev_alloc(9)
• cdev_init(9)

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okay bye bestie, this page is serving source/version energy from ./fs, dated October 2026 — cdev_device_del(9) out. mwah! 💋✨🌸