unregister_chrdev_region(9)

💅 NAME 💅 — unregister_chrdev_region(9)

Okay bestie, welcome to the Kernel API Manual page for unregister_chrdev_region — the function whose whole thing is literally unregister a range of device numbers. ✨

✨ SYNOPSIS ✨

void unregister_chrdev_region (dev_t from , unsigned count );

🎀 ARGUMENTS 🎀

• from — the first number in the range of device numbers to unregister. Like the first text in the group chat.
• count — the number of device numbers to unregister. The whole squad count, basically.

🌸 DESCRIPTION 🌸

Okay so this function unregisters a range of count device numbers, starting with from. Cleanup era behavior, no cap. 💅

The caller should normally be the one who allocated those numbers in the first place... so like, it’s giving “you should be the one who made this reservation” energy. 👀

🦋 SEE ALSO 🦋

• Kernel file: ./fs/char_dev.c
• register_chrdev_region(9)
• alloc_chrdev_region(9)
• __register_chrdev(9)
• __unregister_chrdev(9)
• cdev_add(9)
• cdev_set_parent(9)
• cdev_device_add(9)
• cdev_device_del(9)
• cdev_del(9)
• cdev_alloc(9)
• cdev_init(9)

💖 That’s the whole page, bestie — source/version ./fs, dated October 2026. Stay iconic, and unregister responsibly. 🎀