btree_update(9)

🦋 btree_update(9) 🦋

okay bestie, welcome to the Kernel API Manual page for btree_update(9) — we're updating one entry in the btree and honestly it's giving tiny-but-iconic. 💅

✨ NAME ✨

btree_update - update an entry in the btree

🌸 SYNOPSIS 🌸

int btree_update (struct btree_head *head , struct btree_geo *geo ,
unsigned long *key , void *val );

🎀 ARGUMENTS 🎀

• head — the btree to update. this is the btree we're touching, bestie. 🌳
• geo — the btree geometry. literally the geometry info, ok? ✨
• key — the key to update. we're updating this exact key. 🔑
• val — the value to change it to. and it must not be NULL — no cap, that's required. 💀

💖 DESCRIPTION 💖

This function returns 0 if the update was successful, or -ENOENT if the key could not be found. so like: 0 = update went through, celebrate 🎉; -ENOENT = the key could not be found, it literally wasn't there 😭. that's the whole return-value vibe check, bestie.

🔥 SEE ALSO 🔥

• Kernel file ./include/linux/btree.h
• B+Tree basics(9)
• struct btree_head(9)
• btree_alloc(9)
• btree_free(9)
• btree_init_mempool(9)
• btree_init(9)
• btree_destroy(9)
• btree_lookup(9)
• btree_insert(9)
• btree_remove(9)
• btree_merge(9)
• btree_last(9)
• btree_get_prev(9)

mwah 💋 this iconic page comes from ./include/linux, dated October 2026, and it's literally the btree_update(9) manual. bye bestie, go update that entry 🫶✨