bpf_cpumask_setall(9)

💖 bpf_cpumask_setall(9) — the Kernel API Manual moment 💖

okay so bestie, welcome to the glow-up era of the Kernel API Manual, section 9 🎀 this whole page is about one little function and honestly? it's giving "one job, does it well" energy. let's get into it ✨

🌸 NAME 🌸

bpf_cpumask_setall — literally just sets all of the bits in a BPF cpumask. every single one. the whole squad. no bits left behind 💅

✨ SYNOPSIS ✨

__bpf_kfunc void bpf_cpumask_setall (struct bpf_cpumask *cpumask );

that's it, that's the whole signature 🫶 note the __bpf_kfunc up front (yes it's important, no we're not skipping it) and the struct bpf_cpumask * pointer doing its main character thing.

🦋 ARGUMENTS 🦋

• cpumask — the BPF cpumask that's about to have all of its bits set. it's the one getting the full treatment, the whole makeover, every bit at once 👑

🎀 SEE ALSO 🎀

the lore is deep, bestie — go read the source, it's the kernel file ./kernel/bpf/cpumask.c and the whole cpumask friend group 👇

• struct bpf_cpumask(9)
• bpf_cpumask_create(9)
• bpf_cpumask_acquire(9)
• bpf_cpumask_release(9)
• bpf_cpumask_first(9)
• bpf_cpumask_first_zero(9)
• bpf_cpumask_first_and(9)
• bpf_cpumask_set_cpu(9)
• bpf_cpumask_clear_cpu(9)
• bpf_cpumask_test_cpu(9)
• bpf_cpumask_test_and_set_cpu(9)
• bpf_cpumask_test_and_clear_cpu(9)
• bpf_cpumask_clear(9)
• bpf_cpumask_and(9)
• bpf_cpumask_or(9)
• bpf_cpumask_xor(9)
• bpf_cpumask_equal(9)
• bpf_cpumask_intersects(9)
• bpf_cpumask_subset(9)
• bpf_cpumask_empty(9)
• bpf_cpumask_full(9)
• bpf_cpumask_copy(9)
• bpf_cpumask_any_distribute(9)
• bpf_cpumask_any_and_distribute(9)
• bpf_cpumask_weight(9)
• bpf_cpumask_populate(9)

that's the whole page, bestie, no cap 💀💖 this icon comes from ./kernel/bpf and it's stamped October 2026 — mwah, sending you off with a kiss and a fully-set bitmask 🌈🫶✨