cpuidle_register_device(9)

💖 NAME 💖

cpuidle_register_device — basically the moment a CPU's idle PM feature gets its official registration moment, like showing up to the group chat and being added to the roster ✨

✨ SYNOPSIS ✨

int cpuidle_register_device (struct cpuidle_device *dev );

okay so you're calling this and it hands you back an int, and it takes exactly one thing: a pointer to a struct cpuidle_device 🫶

🎀 ARGUMENTS 🎀

• dev — the cpu 💅 (yes bestie, that's the whole description, that's the vibe, it's the cpu)

🦋 SEE ALSO 🦋

ngl the whole cpuidle friend group shows up here, and the kernel file is ./drivers/cpuidle/cpuidle.c — iconique 💅

• cpuidle_play_dead(9)
• cpuidle_use_deepest_state(9)
• cpuidle_find_deepest_state(9)
• cpuidle_enter_s2idle(9)
• cpuidle_enter_state(9)
• cpuidle_select(9)
• cpuidle_enter(9)
• cpuidle_reflect(9)
• cpuidle_poll_time(9)
• cpuidle_install_idle_handler(9)
• cpuidle_uninstall_idle_handler(9)
• cpuidle_pause_and_lock(9)
• cpuidle_resume_and_unlock(9)
• cpuidle_enable_device(9)
• cpuidle_disable_device(9)
• __cpuidle_register_device(9)
• cpuidle_unregister_device(9)
• cpuidle_unregister(9)
• cpuidle_register(9)
• cpuidle_init(9)

and that's the whole page, bestie — short and slay 🎀

this little beauty lives under ./drivers/cpuidle, dated October 2026, and it's filed in the Kernel API Manual as cpuidle_register_device(9) — mwah, go register a device, ily 💜