radix_tree_iter_lookup(9)

✨ radix_tree_iter_lookup(9) ✨

okay bestie, welcome to the Kernel API Manual 💖 this is the entry for radix_tree_iter_lookup(9), and it is literally about looking up an index in the radix tree. main character energy fr fr 🌸

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🎀 NAME 🎀

radix_tree_iter_lookup — look up an index in the radix tree 💅

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🌸 SYNOPSIS 🌸

void __rcu ** radix_tree_iter_lookup (const struct radix_tree_root *root
, struct radix_tree_iter *iter , unsigned long index );

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🦋 ARGUMENTS 🦋

• root — the radix tree root, aka where the whole tree starts 🌳
• iter — iterator state, the little vibe-check tracker for where you're at ✨
• index — the key to look up, the thing you're searching for 🔎

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💖 DESCRIPTION 💖

so here's the tea ☕ if index is present in the radix tree, this function returns the slot containing it and updates iter to describe the entry. iconic behavior, honestly 👑

if index is not present, it returns NULL. that's it. no cap. 🫶

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🌈 SEE ALSO 🌈

• Kernel file ./include/linux/radix-tree.h and struct radix_tree_iter(9) — start here bestie 📚
• Radix-tree synchronization(9) 🔥
• radix_tree_deref_slot(9) 💫
• radix_tree_deref_slot_protected(9) 🛡️
• radix_tree_deref_retry(9) 🔁
• radix_tree_exception(9) 🙈
• radix_tree_iter_init(9) 🌱
• radix_tree_next_chunk(9) ➡️
• radix_tree_iter_retry(9) 🔄
• radix_tree_iter_resume(9) ⏯️
• radix_tree_chunk_size(9) 📏
• radix_tree_next_slot(9) 👉
• radix_tree_for_each_slot(9) 🌀
• radix_tree_for_each_tagged(9) 🏷️

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mwah 💋 cute little sign-off from the ./include/linux girlies, dated October 2026 💜 — radix_tree_iter_lookup(9) out! 🎀✨