hash_add_rcu(9)

💅 hash_add_rcu(9)

okay so bestie, welcome to the Kernel API Manual ✨ — this one's a little function with main character energy, and it lives in ./include/linux/hashtable.h, iykyk. Let's get into it 🎀

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✨ NAME ✨

hash_add_rcu — literally just add an object to a rcu enabled hashtable 🦋 that's the whole vibe.

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🌸 SYNOPSIS 🌸

hash_add_rcu (hashtable , node , key );

no cap, that's it. three things go in, and the hashtable gets a new resident 🫶

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💖 ARGUMENTS 💖

• hashtable — the hashtable you're adding to 🏠 the one that's about to get a whole new member.
• node — the struct hlist_node of the object being added 📎 like, the actual little hook on the object itself, not the object, bestie, the node.
• key — the key of the object being added 🔑 yes queen, the key. that's how it finds its spot.

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🦋 SEE ALSO 🦋

• Kernel file ./include/linux/hashtable.h
• hash_init(9)
• hash_add(9)
• hash_hashed(9)
• hash_empty(9)
• hash_del(9)
• hash_del_rcu(9)
• hash_for_each(9)
• hash_for_each_rcu(9)
• hash_for_each_safe(9)
• hash_for_each_possible(9)
• hash_for_each_possible_rcu(9)
• hash_for_each_possible_rcu_notrace(9)
• hash_for_each_possible_safe(9)

the whole hashtable friend group fr fr, go say hi to all of them 💜

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ngl the whole family is listed up there, so if hash_add_rcu isn't quite the vibe you were going for, one of its cousins 100% is 🧚

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and that's the page, bestie!! 🌈 from the ./include/linux girlies, dated October 2026 — stay slay, stay rcu-safe, and remember: every hashtable deserves its moment 💅✨🍓