raw_atomic64_fetch_xor(9)

📦 version 7.3.1, in nixpkgs unstable

🦋 raw_atomic64_fetch_xor(9) — Kernel API Manual 🌈

okay bestie, welcome to the page for raw_atomic64_fetch_xor(9), straight outta the Kernel API Manual. yes, we are in the kernel docs, and yes, it's giving main character energy 👑✨

🌸 NAME 🌸

raw_atomic64_fetch_xor — atomic bitwise XOR with full ordering. that's the name, that's the vibe, periodt 💅

✨ SYNOPSIS ✨

the signature, verbatim, do not freestyle it bestie 😭:

s64 raw_atomic64_fetch_xor (s64 i , atomic64_t *v );

🎀 ARGUMENTS 🎀

  • i — an s64 value. that's the value, bestie 🫶
  • v — pointer to atomic64_t. yes, a pointer, to an atomic64_t, exactly as the page says 💖

🦋 DESCRIPTION 🦋

okay so here's the tea ☕: this bad boy atomically updates v to (v ^ i) with full ordering. read that again, bestie: (v ^ i), with full ordering, no cap 🔥

and the other iconic detail: it's safe to use in noinstr code — yes, that's literally what the page says. but elsewhere, prefer atomic64_fetch_xor, okay? the manual says it, so we say it 🫶✨

💖 RETURN 💖

it returns the original value of v — like it hands you the before pic while updating the after pic 😭🔥💅

👑 SEE ALSO 👑

first up, the kernel file: ./include/linux/atomic/atomic-arch-fallback.h — that exact path, bestie, iykyk 🧚✨

and now the whole entire extended fam, every single ref, no cuts, no skips, periodt 👑:

before you go, footer tea ☕: source/version is ./include/linux/atomic, and the date is October 2026. mwah 💋 bye bestie, go atomically XOR something with full ordering ✨👋

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