kho_radix_init_tree(9)

💖 kho_radix_init_tree(9) — like, the radix tree glow-up page 💖

okay so bestie, welcome to the Kernel API Manual entry for kho_radix_init_tree — yes it's a kernel function, yes it's important, and yes I'm gonna explain it so you actually get it 🫶

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✨ NAME ✨

kho_radix_init_tree — initialize the radix tree. that's it, that's the whole vibe ✨

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🌸 SYNOPSIS 🌸

int kho_radix_init_tree (struct kho_radix_tree *tree , struct
kho_radix_node *root );

literally just hand it a tree and a root and it does its thing 💅

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🎀 ARGUMENTS 🎀

• tree — the tree to initialize. the main character, the one getting set up 💖
• root — root table of the radix tree. the foundation, the anchor, the roots of the whole situation 🌱

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🦋 DESCRIPTION 🦋

so what it does: it initializes the radix tree with the given root node. simple, iconic, no cap ✨

now here's the part you actually need to remember:

• if root is NULL, an empty root table is allocated for you. free real estate, the function handles it 🎁
• if root is not NULL, then it's the caller's responsibility to make sure the root is valid and in the correct format. that's on you bestie, not on the function 😭 like it's not gonna double-check your work, so do it right 💀

no cap: passing a bad root isn't a "the function will figure it out" situation. it won't. valid and correct format, or it's giving chaos 🙈

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🔥 RETURN 🔥

• 0 on success — slay, we ate 💅
• -errno on failure — it tells you what went wrong, king behavior 👑

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🌈 SEE ALSO 🌈

kernel file: ./kernel/liveupdate/kexec_handover.c

and the whole friend group 👯♀️:

kho_encode_radix_key(9), kho_decode_radix_key(9), kho_radix_add_key(9), kho_radix_del_key(9), kho_radix_destroy_tree(9), kho_radix_walk_tree(9), kho_restore_folio(9), kho_restore_pages(9), kho_reserve_scratch(9), kho_add_subtree(9), kho_preserve_folio(9), kho_unpreserve_folio(9), kho_preserve_pages(9), kho_unpreserve_pages(9), kho_preserve_vmalloc(9), kho_unpreserve_vmalloc(9), kho_restore_vmalloc(9), kho_alloc_preserve(9), kho_unpreserve_free(9), kho_restore_free(9), is_kho_boot(9), kho_retrieve_subtree(9)

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and that's the page!! mwah 💋 this gem comes to you from ./kernel/liveupdate, dated October 2026 — go read it again if you need to, i'll wait 🧚‍♀️💜