devm_backlig...e_unregister(9)

📦 version 7.3.1, in nixpkgs unstable

💅 devm_backlight_device_unregister(9)

okay so this is a page straight out of the Kernel API Manual (yes, the actual Linux kernel docs, we're fancy now) and it's about unregistering a backlight device. very niche. very demure. very much for the driver girlies. ✨

🌸 NAME 🌸

devm_backlight_device_unregister — unregister backlight device

like. it unregisters a backlight device. that's the whole vibe check. 🎀

✨ SYNOPSIS ✨

void devm_backlight_device_unregister (struct device *dev , struct backlight_device *bd );

no return value, no drama, it just does the thing and leaves. main character exits the scene. 💅

🫶 ARGUMENTS 🫶

  • dev — the device to unregister. literally the device. the one being unregistered. yes bestie, that one. 🌈
  • bd — the backlight device to unregister. okay so there are two things getting unregistered here and the naming is doing absolutely nothing to help us, but we move. 💀

🦋 DESCRIPTION 🦋

So here's the tea: this function deallocates a backlight that was allocated with devm_backlight_device_register. clean up your own mess, iconic behaviour honestly. 🧹✨

But — and this is the important part, don't skip it — normally this function will not need to be called, because the resource management code will make sure the resources get freed. like the kernel has a whole entire system for this and it's already handling it for you. so if you're out here calling this manually for no reason... bestie, why. 😭

fr fr though — the "normally you don't need this" part is not a suggestion, it's the actual design. the devm machinery does the cleanup so you don't have to. 🔥

👑 SEE ALSO 👑

go read them. iykyk. 📚💜

that's the whole page, no notes. this one lives in ./drivers/video/backlight and it's dated October 2026 — footer name on the tin is devm_backlig...e_unregister(9) because even the manpage itself got truncated, we love a humble queen. mwah 💋

📦 where this page comes from