__cpuidle_unregister_driver(9)

💖 __cpuidle_unregister_driver — NAME 🌸

okay so bestie, this is __cpuidle_unregister_driver(9) from the Kernel API Manual — the vibe is simply unregister the driver. that's it, that's the whole name section 💅

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✨ SYNOPSIS ✨

void __cpuidle_unregister_driver (struct cpuidle_driver *drv );

like, no return value, she returns void, we love a queen who doesn't overpromise 🫶

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🎀 ARGUMENTS 🎀

• drv — a valid pointer to a struct cpuidle_driver. key word: valid, okurrr 🔥 this is not the place to be passing your little garbage pointer, no cap.

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🦋 DESCRIPTION 🦋

so what does she actually do? three things, in order, and honestly she's serving main character energy the whole time:

• checks whether the driver is no longer in use 👀 (like, is anybody still holding onto this thing or nah)
• resets the global cpuidle driver variable(s) 🔄
• disables the timer broadcast notification mechanism, but only if it was in use 🌈

that's the whole routine. cleanup szn, periodt 💅 not me admiring a teardown function on main 😭

fr fr, note the wording: the driver has to be no longer in use, and the broadcast timer thing only gets switched off if it was in use in the first place. don't go reading extra behaviour into it, bestie, the page keeps it exactly that simple 🙈

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💜 SEE ALSO 💜

all the siblings and cousins, straight from the kernel file ./drivers/cpuidle/driver.c, in the exact order the page gives them:

1. __cpuidle_get_cpu_driver(9)
2. __cpuidle_unset_driver(9)
3. __cpuidle_set_driver(9)
4. __cpuidle_get_cpu_driver(9) — yes, again 😭 the list really does say it twice, i don't make the rules
5. __cpuidle_set_driver(9) — also twice 💀 iconic of them tbh
6. __cpuidle_unset_driver(9) — third time's the charm 🍓
7. cpuidle_setup_broadcast_timer(9)
8. __cpuidle_driver_init(9)
9. __cpuidle_register_driver(9)
10. cpuidle_register_driver(9)
11. cpuidle_unregister_driver(9)
12. cpuidle_get_driver(9)
13. cpuidle_get_cpu_driver(9)
14. cpuidle_driver_state_disabled(9)

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🧚 a little sign-off 🧚

this cutie lives in ./drivers/cpuidle, the page is dated October 2026, and the source/version line is literally the same __cpuidle_unregister_driver(9) we've been screaming about this whole time 👑 go read the other ones, iykyk 💖✨

okay bye bestie, go unregister something responsibly 💅🌸