atomic_fetch_and_release(9)

📦 version 7.3.1, in nixpkgs unstable

💅 atomic_fetch_and_release(9) — Kernel API Manual 💅

okay so bestie, this is atomic_fetch_and_release from the Kernel API Manual, section 9, and it's lowkey iconic. It's the atomic bitwise AND that also has release ordering. Let's get into it ✨

✨ NAME ✨

atomic_fetch_and_release — atomic bitwise AND with release ordering 🎀

🌸 SYNOPSIS 🌸

int atomic_fetch_and_release (int i , atomic_t *v );

🦋 ARGUMENTS 🦋

  • i — an int value. that's the thing you're AND-ing with, bestie 💖
  • v — pointer to atomic_t. this is the atomic variable getting updated 🫶

🔥 DESCRIPTION 🔥

Atomically updates v to (v & i) with release ordering. yes, atomically — it's giving main character energy, no cap 💅

⚠️ Unsafe to use in noinstr code — use raw_atomic_fetch_and_release there instead. like, do not use this one in that context, fr fr. 🙈

⭐ RETURN ⭐

The original value of v. you get back the pre-update value, periodt 💖

👑 SEE ALSO 👑

the kernel file is literally ./include/linux/atomic/atomic-instrumented.h, and the whole atomic family showed up to the group chat 🌈💖:

mwah 💋 this page lives in ./include/linux/atomic, dated October 2026, and it's atomic_fetch_and_release(9) — see you in the kernel, bestie 🫶💖

📦 where this page comes from