xa_tag_pointer(9)

📦 version 7.3.1, in nixpkgs unstable

💅 xa_tag_pointer — Kernel API Manual ✨

okay so bestie, welcome to xa_tag_pointer(9) from the Kernel API Manual. this one's short and sweet and honestly kind of iconic? we're making a tagged-pointer XArray entry. that's it. that's the whole vibe. 🎀

🌸 NAME 🌸

xa_tag_pointer — Create an XArray entry for a tagged pointer. literally its whole job, no cap.

✨ SYNOPSIS ✨

void * xa_tag_pointer (void *p , unsigned long tag );

🦋 ARGUMENTS 🦋

  • p — Plain pointer. just a regular pointer, living its plain little life, about to get a glow-up.
  • tag — Tag value (0, 1 or 3). yes those are the only three, don't come at me with a 2 🙈

💖 DESCRIPTION 💖

okay so here's the tea 🔥 — if you're using the XArray and you'd rather not store value entries, you're totally allowed to tag your pointers instead. main character energy, honestly.

Three tags are available: 0, 1 and 3. the way that 2 is just not invited to the party 💀

these tags are distinct from the xa_mark_t — because they are not replicated up through the array, and they cannot be searched for. like, they're just not doing all that. periodt. 🫶

👑 CONTEXT 👑

Any context. literally any. she's flexible like that. 💅

⭐ RETURN ⭐

An XArray entry. that's the whole thing. slay. ✨

🌈 SEE ALSO 🌈

Kernel file ./include/linux/xarray.h

the full bestie roll call, and yes every single one of them made the list:

that's the page bestie, go tag some pointers responsibly 💜

./include/linux · October 2026 · xa_tag_pointer(9) — mwah, read u next time 🧚‍♀️🍓

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