cpumask_set_cpu(9)

💖 cpumask_set_cpu 💖

okay so welcome to the cpumask_set_cpu(9) page, bestie — it's a Kernel API Manual moment and honestly it's a short one, so we can absolutely slay this together 🫶

---

✨ NAME ✨

cpumask_set_cpu — set a cpu in a cpumask 💅

---

🌸 SYNOPSIS 🌸

void cpumask_set_cpu (unsigned int cpu , struct cpumask *dstp );

like, that's the whole vibe. one function, two args, no drama ✨

---

🎀 ARGUMENTS 🎀

• cpu — the cpu number, and it has to be < nr_cpu_ids (yes literally, that's the ceiling, keep it under that 👑)
• dstp — the cpumask pointer. the actual mask you're poking. your main character struct 💫

---

🦋 SEE ALSO 🦋

Kernel file ./include/linux/cpumask.h — and omg the friend group here is HUGE, so buckle up 🍓

cpumask_pr_args(9), cpumask_first(9), cpumask_first_zero(9), cpumask_first_and(9), cpumask_first_andnot(9), cpumask_first_and_and(9), cpumask_last(9), cpumask_next(9), cpumask_next_zero(9), cpumask_next_and(9), cpumask_next_andnot(9), cpumask_next_and_wrap(9), cpumask_next_wrap(9), cpumask_random(9), for_each_cpu(9), for_each_cpu_wrap(9), for_each_cpu_and(9), for_each_cpu_andnot(9), for_each_cpu_or(9), for_each_cpu_from(9), cpumask_any_but(9), cpumask_any_and_but(9), cpumask_any_andnot_but(9), cpumask_nth(9), cpumask_nth_and(9), cpumask_nth_and_andnot(9), cpumask_clear_cpus(9), cpumask_clear_cpu(9), cpumask_test_cpu(9), cpumask_test_and_set_cpu(9), cpumask_test_and_clear_cpu(9), cpumask_setall(9), cpumask_clear(9)

cpumask_and(9), cpumask_or(9), cpumask_weighted_or(9), cpumask_xor(9), cpumask_andnot(9), cpumask_equal(9), cpumask_or_equal(9), cpumask_intersects(9), cpumask_subset(9), cpumask_empty(9), cpumask_full(9), cpumask_weight(9), cpumask_weight_and(9), cpumask_weight_andnot(9), cpumask_shift_right(9), cpumask_shift_left(9), cpumask_copy(9)

cpumask_any(9), cpumask_any_and(9), cpumask_of(9), cpumask_parse_user(9), cpumask_parselist_user(9), cpumask_parse(9), cpulist_parse(9), cpumask_size(9), alloc_cpumask_var(9), to_cpumask(9), num_online_cpus(9), cpumap_print_bitmask_to_buf(9), cpumap_print_list_to_buf(9)

like I said. huge friend group. iykyk 😭💜

---

ngl bestie, read those before you go writing your own mask math — the neighbors lowkey cover everything this one doesn't 🔥

---

and that's the whole page, periodt 🧚 from ./include/linux, dated October 2026, filed under cpumask_set_cpu(9) — mwah, go set some cpus 💅🌈⭐