cpuhp_remov...s_cpuslocked(9)

💅 cpuhp_remov...s_cpuslocked(9) — Kernel API Manual, bestie! 🎀

okay so real talk, we're deep in the kernel hotplug docs rn and this one is ✨niche✨ but it's giving main character energy for anyone doing CPU hotplug while already holding a lock. Let's get into it 🫶

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✨ NAME ✨

cpuhp_remove_state_nocalls_cpuslocked — the one that yanks out hotplug state callbacks and doesn't invoke the teardown, and you're only allowed to call it from inside a region held by cpus_read_lock(). no cap, that's the whole vibe check 💅

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🌸 SYNOPSIS 🌸

void cpuhp_remove_state_nocalls_cpuslocked (enum cpuhp_state state );

literally one arg, one return type, that's it. slay ✨

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🦋 ARGUMENTS 🦋

• state — the state whose calls get removed. like, this is which hotplug state you're tearing down the callbacks for. iconic little enum 🎀

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💖 DESCRIPTION 💖

okay so it's the same as cpuhp_remove_state nocalls, bestie — literally the same deal — except you must invoke it from within a region held by cpus_read_lock(). that's the whole difference and the whole personality. "cpuslocked" in the name is not decorative, it's a promise, iykyk 🔥

⚠️ lowkey important: if you're not inside a cpus_read_lock held region, this is not the function for you. the name is screaming it at you fr fr 😭

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🌈 SEE ALSO 🌈

so there's a whole friend group here, and the kernel file ./include/linux/cpuhotplug.h is where they all hang out 👑

• cpuhp_setup_state(9)
• cpuhp_setup_state_cpuslocked(9)
• cpuhp_setup_state_nocalls(9)
• cpuhp_setup_state_nocalls_cpuslocked(9)
• cpuhp_setup_state_multi(9)
• cpuhp_state_add_instance(9)
• cpuhp_state_add_instance_nocalls(9)
• cpuhp_state_add_instance_nocalls_cpuslocked(9)
• cpuhp_remove_state(9)
• cpuhp_remove_state_nocalls(9)
• cpuhp_remove_multi_state(9)
• cpuhp_state_remove_instance(9)
• cpuhp_state_remove_instance_nocalls(9)

plus the source lives at Kernel file ./include/linux/cpuhotplug.h — go read the header, it ate 💀✨

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anyway that's the page, mwah 💋 — this little drop came from ./include/linux, dated October 2026, and it's filed under cpuhp_remov...s_cpuslocked(9). go forth and hold that read lock responsibly bestie 🌸🦋💜