raw_atomic6...turn_relaxed(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 raw_atomic64_sub_return_relaxed — from the Kernel API Manual, bestie ✨

Okay so real talk, this page is deep in the kernel-API manual and it is lowkey iconic for how much it does with so few words. Sit down, hydrate, and let's get into it 🫶

✨ NAME ✨

raw_atomic64_sub_return_relaxed — atomic subtract with relaxed ordering 💅

🦋 SYNOPSIS 🦋

s64 raw_atomic64_sub_return_relaxed (s64 i , atomic64_t *v );

🎀 ARGUMENTS 🎀

  • i — an s64 value, and it's literally the thing you're subtracting ✨
  • v — pointer to atomic64_t 👑

💖 DESCRIPTION 💖

So what it does is: atomically updates v to (v - i) with relaxed ordering. Like, the whole subtraction happens as one atomic operation, no cap 🧚

And the vibe check on the caveat: it's safe to use in noinstr code; prefer atomic64_sub_return_relaxed elsewhere. That's it, that's the rule 💀

Bestie, take that noinstr note seriously — the manpage is telling you exactly where this one belongs, and everywhere else wants the other one 🙈

🌈 RETURN 🌈

The updated value of v. She gives you the answer back, main character energy 👑

⭐ SEE ALSO ⭐

The kernel file this lives in: ./include/linux/atomic/atomic-arch-fallback.h 🍓

And because this family is huge, here is every single sibling — no skipping, we don't do that here 💜

And that's the whole page, bestie 💖 This one ships from ./include/linux/atomic, dated October 2026, straight out of the Kernel API Manual 🎀 Go forth and subtract atomically, you absolute legend 👑🦋

📦 where this page comes from