raw_atomic_xor(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 raw_atomic_xor 💅

okay so bestie, this is a page from the Kernel API Manual, section 9 — yes, kernel land, we're literally in the driver-adjacent part of the filesystem. sit down, hydrate, let's go 🫶

✨ NAME ✨

raw_atomic_xor — atomic bitwise XOR, but make it relaxed ordering. no cap, that's the whole vibe.

🦋 SYNOPSIS 🦋

void raw_atomic_xor (int i , atomic_t *v );

that's it. that's the whole signature. she's small but she's mighty 😭

🎀 ARGUMENTS 🎀

  • i — an int value. your little XOR buddy, the thing you're bringing to the party.
  • v — pointer to atomic_t. this is the main character of the operation, and yes she's a pointer, treat her with respect 👑

🌈 DESCRIPTION 🌈

so what happens is: v gets atomically updated to (v ^ i) — like, all in one go, nobody can sneak in halfway — and the ordering is relaxed. think chill, lowkey, no unnecessary fences in the way ⭐

it's also safe to use in noinstr code — iconic behavior, honestly 💀 but outside of that, bestie, prefer atomic_xor elsewhere. that's the recommendation, take it 🙈

💖 RETURN 💖

Nothing. nothing at all. she gives nothing back, she simply does the thing. it's giving mysterious, it's giving void 🎀

🔥 SEE ALSO 🔥

first up, the kernel file: ./include/linux/atomic/atomic-arch-fallback.h — that's where the magic lives.

and then... okay, buckle up, because this list is long and every single one of these is getting her moment. no skipping, i promised 💅

like, that's the whole extended family. the 32-bit girlies AND the 64-bit girlies. we love a supportive family tree 🌳💜

that's the page, bestie!! and because we always credit our sources: this one's from the kernel source dir ./include/linux/atomic, dated October 2026, and she lives on page raw_atomic_xor(9). mwah 💋✨ go xor something, safely 🫶

📦 where this page comes from