cpumask_next(9)

📦 version 7.3.1, in nixpkgs unstable

💅 cpumask_next — get the next cpu in a cpumask

okay bestie, welcome to the Kernel API Manual (yes, that's the manual name, we're fancy here ✨) — this little page is all about cpumask_next(9), and honestly? it's giving "tiny function, big main character energy" 🎀

🌸 SYNOPSIS 🌸

unsigned int cpumask_next (int n , const struct cpumask *srcp );

like, look at her. two args. no cap. 💖

🦋 ARGUMENTS 🦋

  • n — the cpu prior to the place to search, i.e. the return value is gonna be greater than n. so think of it as "start looking strictly after this one, bestie" 🙈
  • srcp — the cpumask pointer. that's the mask we're snooping through 💅

✨ RETURN ✨

returns a value >= nr_cpu_ids if there are no further cpus set 😭 — so if you get something that big, that's the universe (and the mask) telling you there's nothing left in there, periodt.

🔥 SEE ALSO 🔥

it's in the kernel file ./include/linux/cpumask.h 📁 and omg the friend group is huge, here's literally everyone:

like I said. iconic. the whole clique showed up 💀👑

heads up bestie: this page comes from ./include/linux and it's dated October 2026, so if you're citing it in a group chat, cite it with pride 🫶

and that's the whole page!! go find your next cpu, slay, and remember: cpumask_next(9) said what it said 💜🌈⭐

📦 where this page comes from