mtree_insert(9)

💖 NAME 💖

okay so welcome to the mtree_insert(9) glow-up, bestie — straight out of the Kernel API Manual ✨

mtree_insert — insert an entry at a given index, but only if there's no value there already. it's giving "respectfully, this seat is taken" energy: if the spot is free you slide your entry in, and if it's not, no cap, the call just refuses. periodt. 💅

✨ SYNOPSIS ✨

int mtree_insert (struct maple_tree *mt , unsigned long index , void *entry , gfp_t gfp );

🦋 ARGUMENTS 🦋

• mt — the maple tree you're working with, your main character data structure 🌳
• index — the index where the value is gonna be stored, iykyk
• entry — the entry itself, the thing you're storing 🎀
• gfp — the GFP_FLAGS used for allocations, the whole memory vibe check

🎀 RETURN 🎀

• 0 — success!! it worked, slay 💖
• -EEXISTS — the range is occupied already, someone got there first 😭
• -EINVAL — invalid request, not it 🙈
• -ENOMEM — memory could not be allocated, tragic 💀

🔥 SEE ALSO 🔥

peep the kernel file ./lib/maple_tree.c, and honestly the whole iconic friend group of maple tree functions:

• mas_prealloc_calc(9)
• mas_wr_preallocate(9)
• mas_insert(9)
• mas_alloc_cyclic(9)
• mas_walk(9)
• mte_dead_walk(9)
• mt_free_walk(9)
• mas_store(9)
• mas_store_gfp(9)
• mas_store_prealloc(9)
• mas_preallocate(9)
• mas_next(9)
• mas_next_range(9)
• mt_next(9)
• mas_prev(9)
• mas_prev_range(9)
• mt_prev(9)
• mas_pause(9)
• mas_find_setup(9)
• mas_find(9)
• mas_find_range(9)
• mas_find_rev_setup(9)
• mas_find_rev(9)
• mas_find_range_rev(9)
• mas_erase(9)
• mas_nomem(9)
• mas_nomem_nofail(9)
• mtree_load(9)
• mtree_store_range(9)
• mtree_store(9)
• mtree_insert_range(9)
• mtree_alloc_cyclic(9)
• mtree_erase(9)
• __mt_dup(9)
• mtree_dup(9)
• __mt_destroy(9)
• mtree_destroy(9)
• mt_find(9)
• mt_find_after(9)

mwah 💋 this little icon lives in ./lib and is dated October 2026 — go forth and insert responsibly, bestie 🫶