softleaf_is_poison_marker(9)

📦 version 7.3.1, in nixpkgs unstable

💅 softleaf_is_poison_marker(9) — Kernel API Manual, bestie edition 🧚

okay so real quick, before we get into it: this whole page lives in the Kernel API Manual (section 9, for the uninitiated 💫), so that's the vibe. Now let's get into the actual tea 🍓

✨ NAME ✨

softleaf_is_poison_marker — the little function that answers the question "is this leaf entry a poison marker?" and honestly? it eats every time 💅

🌸 SYNOPSIS 🌸

bool softleaf_is_poison_marker (softleaf_t entry );

🎀 ARGUMENTS 🎀

  • entry — the leaf entry. that's it, that's the whole argument. a leaf entry. hand it over and let the function do its thing 🫶

🦋 DESCRIPTION 🦋

so the poison marker gets set via UFFDIO_POISON — that's the how, that's the lore 🔥

also important: this one is userfaultfd-specific, meaning it's not out here being universal, it's specifically for the userfaultfd crowd. iykyk 💜

⭐ RETURN ⭐

  • true — yup, that leaf entry is a poison marker 🎉
  • false — nope, it's literally not 🙈

👑 SEE ALSO 👑

starting with the file itself, the whole source of truth:

./include/linux/leafops.h

and now the full friend group, no one left out, periodt:

ngl bestie, if you're poking at leaf markers in general you're gonna want that whole list. it's giving "read the whole syllabus before the exam" 😭 but like, lovingly 💖

okay that's the page!! mwah 💋 this one shipped out of ./include/linux and the version/date on it is October 2026 — so yeah, mark your calendars, future girlies will still be checking leaf entries for poison markers 💀✨ bye bestie, slay responsibly 🎀

📦 where this page comes from