bpf_cpumask_...nd_clear_cpu(9)

🦋 bpf_cpumask_...nd_clear_cpu(9) 🦋

okay so bestie, welcome to the Kernel API Manual — this page is all about bpf_cpumask_test_and_clear_cpu, and it's giving "atomic little vibe check on a BPF cpumask" energy. no cap, every detail is right here. 💖

✨ NAME ✨

bpf_cpumask_test_and_clear_cpu — atomically test and clear a CPU in a BPF cpumask. periodt. 💅

🌸 SYNOPSIS 🌸

__bpf_kfunc bool bpf_cpumask_test_and_clear_cpu (u32 cpu , struct bpf_cpumask *cpumask );

🎀 ARGUMENTS 🎀

• cpu — the CPU being cleared and queried for. yes, both at once, main character energy. 🔥
• cpumask — the BPF cpumask being cleared and queried for containing a CPU. 🫶

💅 RETURN 💅

• true — cpu is set in the cpumask. ✅
• false — cpu was not set in the cpumask, or cpu is invalid. 😭

🌈 SEE ALSO 🌈

Kernel file ./kernel/bpf/cpumask.c and these iconique friends:

• 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_setall(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)

okay bye bestie! 🫶 this page comes from ./kernel/bpf, dated October 2026, and its manual page name is bpf_cpumask_...nd_clear_cpu(9). slay, go test and clear those CPUs atomically. 💖✨