llist_del_first(9)

✨ llist_del_first ✨

okay so this is from the Kernel API Manual, section 9 — yes the whole (9) thing, that's the section bestie, we love a numbered era 🎀

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💖 NAME 💖

llist_del_first — delete the first entry of a lock-less list. that's it. that's the whole vibe. 🦋

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🌸 SYNOPSIS 🌸

struct llist_node * llist_del_first (struct llist_head *head );

literally the whole signature, no notes 👑

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🎀 ARGUMENTS 🎀

• head — the head for your lock-less list 🫶 like, the actual entry point of the whole thing, you gotta hand it over

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💅 DESCRIPTION 💅

okay so first things first: vibe check on the list. if the list is empty, you get NULL back. that's the deal. no list, no entry, no nothing 🙈

otherwise? you get the first entry back — deleted, babes, it's gone from the list and it's yours now. and here's the fun part: that entry is the newest added one. newest in, first out. it's giving stack energy honestly 💀

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now the big caveat, and I need you to actually read this one because it's the whole reason this page exists 😭

Only one llist_del_first user can be used simultaneously with multiple llist_add users — and that's without a lock. if you want more consumers than that, nope, not happening, not today bestie.

why? because otherwise, the sequence llist_del_first, llist_add, llist_add in another user may change head->first->next, but keep head->first. yeah. it'll mess with the links and leave the head pointing at the same place, and that is a whole situation 💀 (same energy applies to llist_del_all, llist_add, llist_add in another user — that sequence has the same problem, so don't come for me saying I didn't warn you)

so if you genuinely need multiple consumers? you've got two options, pick your fighter:

• use llist_del_all 👑
• or put a lock between your consumers 🔒

no third option, no secret hack, that's the menu 🍓

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🧚 SEE ALSO 🧚

• Kernel file ./lib/llist.c
• llist_del_first_this(9)
• llist_reverse_order(9)

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and that's the page!! mwah 💋 this one came from ./lib and it's dated October 2026 — so yeah, mark your calendars, screenshot it, put it in the group chat, the llist lore is timeless fr fr 🌈⭐💜