raw_atomic64_set(9)

📦 version 7.3.1, in nixpkgs unstable

💅 raw_atomic64_set(9) — Kernel API Manual, but make it make sense 🦋

okay bestie, welcome to the raw_atomic64_set page from the Kernel API Manual ✨ this one's a short one, but it's lowkey important, so let's get into it 🫶

✨ NAME ✨

raw_atomic64_set — atomic set with relaxed ordering 💫

🌸 SYNOPSIS 🌸

void raw_atomic64_set (atomic64_t *v , s64 i );

that's it. that's the whole signature. iconic behavior honestly 👑

🎀 ARGUMENTS 🎀

  • v — pointer to atomic64_t 💖 (the thing you're setting, she's the main character here)
  • i — s64 value to assign 🍓 (the value you're sliding into her, no cap)

🌈 DESCRIPTION 🌈

Atomically sets v to i with relaxed ordering. ⭐

so like, the swap happens in one atomic lil moment — nobody's catching her mid-update — but the memory ordering is relaxed, meaning she is not out here ordering other memory ops around her. she's chill. she's minding her business. 🧚

Safe to use in noinstr code; prefer atomic64_set elsewhere. 🔥

okay that last bit is the real tea fr fr — noinstr code is the special case, and everywhere else you should be reaching for plain atomic64_set, not this one. read the room bestie 💅

💜 RETURN 💜

Nothing. 💀 she gives you zero back. no return value, no notes, just vibes.

🦋 SEE ALSO 🦋

the source file, for when you wanna go look at her home:

  • Kernel file ./include/linux/atomic/atomic-arch-fallback.h

and then. okay. the guest list. it's long. it's giving family reunion at the atomic ops house 😭 but every single one is invited, so:

the 32-bit raw_atomic_* girlies:

and the 64-bit raw_atomic64_* side of the family (aka her actual sisters, note there's no raw_atomic64_set in here — that's this page, you're already reading her 💅):

like I said. huge family. but every single name's on the list, so nobody's left out 🫶

and that's the whole page bestie 💜 short, sweet, atomically correct ✨ this came from ./include/linux/atomic, dated October 2026 — so go forth, set your atomic64_t with relaxed ordering, and remember: noinstr only, atomic64_set everywhere else. periodt. 💅🎀

📦 where this page comes from