raw_notifie...n_unregister(9)

💅 raw_notifier_chain_unregister — a Kernel API Manual moment ✨

okay so bestie, we're in the Kernel API Manual today and this one is literally the "breakup" function of the notifier world 🫶 she removes somebody from the group chat, no drama, no cap.

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✨ NAME ✨

raw_notifier_chain_unregister — Remove notifier from a raw notifier chain 🎀

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🌸 SYNOPSIS 🌸

int raw_notifier_chain_unregister (struct raw_notifier_head *nh , struct
notifier_block *n );

it's giving "small signature, big responsibilities" 💅

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🦋 ARGUMENTS 🦋

• nh — Pointer to head of the raw notifier chain 👑 like, this is the queen bee of the whole chain, the head of the group chat.
• n — Entry to remove from notifier chain 💀 this is the one getting kicked out (politely!!).

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💖 DESCRIPTION 💖

okay so the whole ~vibe~ here is: Removes a notifier from a raw notifier chain. 🧚 simple, iconic, done.

but here's the part you CANNOT skip, bestie, and I'm gonna say it louder for the people in the back: All locking must be provided by the caller. 😭 fr fr. this function does not lock anything for you. not one bit. that's your job. you are the main character here and the locking is your responsibility, periodt. don't come crying to me if you forget 🙈

then the returns. she Returns zero on success ✨ or -ENOENT on failure 💀 — and yeah, -ENOENT is exactly what you think, "no such entry", i.e. the thing you tried to remove wasn't even in the chain. embarrassing for everyone involved honestly.

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⭐ SEE ALSO ⭐

• Kernel file ./kernel/notifier.c 📁 (the source material, iykyk)
• notifier_call_chain(9)
• notifier_call_chain_robust(9)
• atomic_notifier_chain_register(9)
• atomic_notifier_chain_register_unique_prio(9)
• atomic_notifier_chain_unregister(9)
• atomic_notifier_call_chain(9)
• atomic_notifier_call_chain_is_empty(9)
• blocking_notifier_chain_register(9)
• blocking_notifier_chain_register_unique_prio(9)
• blocking_notifier_chain_unregister(9)
• blocking_notifier_call_chain(9)
• raw_notifier_chain_register(9)
• raw_notifier_call_chain(9)
• srcu_notifier_chain_register(9)
• srcu_notifier_chain_unregister(9)
• srcu_notifier_call_chain(9)
• srcu_init_notifier_head(9)

like yes, that's a LOT of friends, but they're all in the same notifier family and honestly the whole squad ate 🔥 go read them, they're all slay 🫶

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🎀 sign-off 🎀

this little beauty lives in ./kernel and the version tag says October 2026 ⭐ so that's the era we're in. go forth, unregister responsibly, lock your chains, and remember: zero on success, -ENOENT when it's not even there. mwah 💋💜