blocking_not..._unique_prio(9)

✨ blocking_not..._unique_prio(9) ✨

okay so this is a page straight out of the Kernel API Manual bestie, and the star of the show is literally blocking_notifier_chain_register_unique_prio 💅 yes that's the whole name, she's long, she's iconic, she ate. anyway sit down, we're learning notifier chains today 🫶

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🌸 NAME 🌸

blocking_notifier_chain_register_unique_prio — Add notifier to a blocking notifier chain ✨

🦋 SYNOPSIS 🦋

int blocking_notifier_chain_register_unique_prio (struct
blocking_notifier_head *nh , struct notifier_block *n );

like, that's the whole signature, no cap 📜

🎀 ARGUMENTS 🎀

• nh — Pointer to head of the blocking notifier chain — she's the main character of the chain, the head honcho 👑
• n — New entry in notifier chain — the new girl joining the group chat 🎀

💖 DESCRIPTION 💖

okay so what she does: she adds a notifier to an blocking notifier chain — but only if there is no other notifier registered using the same priority. it's giving exclusive invite list, iykyk 🙈✨

returns 0 on success 💚, or -EEXIST or -EBUSY on error 😭

fr fr, if that priority slot is already taken, she's not letting you in — that's the whole vibe check 💀

🔥 SEE ALSO 🔥

• Kernel file ./kernel/notifier.c 📁
• 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_unregister(9)
• blocking_notifier_call_chain(9)
• raw_notifier_chain_register(9)
• raw_notifier_chain_unregister(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, the whole notifier family reunion, obsessed 🌈💜

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and that's the page bestie 🫶 brought to you by ./kernel, dated October 2026, filed under blocking_not..._unique_prio(9) 🎀 slay, go register some notifiers responsibly ✨💅