bpf_cpumask_xor(9)

📦 version 7.3.1, in nixpkgs unstable

💅 bpf_cpumask_xor(9) — kernel API manual, bestie edition

okay so you found the page for bpf_cpumask_xor, and honestly? it's a lil icon. it lives in the Kernel API Manual, and by the end of this you're gonna be XOR-ing cpumasks like it's nothing. periodt. ✨

🌸 NAME 🌸

bpf_cpumask_xor — XOR two cpumasks and store the result.

like, it takes two cpumasks, does the exclusive-or thing, and drops the answer somewhere. no cap, that's the whole vibe.

🦋 SYNOPSIS 🦋

__bpf_kfunc void bpf_cpumask_xor (struct bpf_cpumask *dst , const struct
       cpumask *src1 , const struct cpumask *src2 );

look at her. three params, returns void, __bpf_kfunc and all. copy it exactly, don't get cute with it 🎀

🎀 ARGUMENTS 🎀

  • dst — the BPF cpumask where the result is being stored. that's the glow-up location, the place the answer moves into 💖
  • src1 — the first input. one half of the equation, bestie.
  • src2 — the second input. the other half. together they make magic ✨

🧚 DESCRIPTION 🧚

so here's the tea: struct bpf_cpumask pointers may be safely passed to src1 and src2. that's it, that's the whole note — but it's an important one, so don't skip it 🙈

like, fr fr, you can hand a struct bpf_cpumask over as either input and it's all good. the manpage says so, so we say so. 💅

👑 SEE ALSO 👑

the whole friend group, in the order the page lists them:

go read them all, you'll be so smart. iykyk 🧠💜

that's the whole page, bestie. shoutout to ./kernel/bpf for shipping it and to the October 2026 release notes for the timestamp — mwah, iconic, no notes 🫶🌈⭐

📦 where this page comes from