atomic64_xchg_release(9)

📦 version 7.3.1, in nixpkgs unstable

💅 atomic64_xchg_release — straight out of the Kernel API Manual, section 9

okay so bestie, welcome to atomic64_xchg_release(9), and yes the manual name is literally Kernel API Manual — we're in the kernel docs, section 9, and this one is a whole vibe 🎀

✨ NAME ✨

atomic64_xchg_release — atomic exchange with release ordering. that's it, that's the function 💅

🦋 SYNOPSIS 🦋

s64 atomic64_xchg_release (atomic64_t *v , s64 new );

(no, the spacing is not a typo, copy it exactly, iykyk 🙈)

🍓 ARGUMENTS 🍓

  • v — pointer to atomic64_t. it's the thing we're gonna swap out, main character energy 👑
  • new — an s64 value to assign. this is the glow-up that goes in 🫶

💖 DESCRIPTION 💖

Atomically updates v to new with release ordering. one clean swap, no half-states, no messy in-between eras — literally the whole point ✨

⚠️ unsafe to use in noinstr code. if you're in noinstr, use raw_atomic64_xchg_release there instead. not me warning you twice, it's just facts 💀

🌈 RETURN 🌈

The original value of v. so you get the old value back while the new one moves in — trade, not a steal 💫

🎀 SEE ALSO 🎀

Kernel file ./include/linux/atomic/atomic-instrumented.h — and bestie, the friend group here is massive, so buckle up, we're listing every single one 🧚✨

the atomic_* girlies:

the 64-bit squad (our actual function's fam) 🔥:

the atomic_long_* crew, doing the absolute most 💜:

and that's the whole page, bestie — every single (9) accounted for, no cap 🫶

cute little sign-off: this page sourced from ./include/linux/atomic, dated October 2026, and it's atomic64_xchg_release(9) all the way down 💖✨

📦 where this page comes from