cpumask_next_and(9)

✨ cpumask_next_and(9) ✨

okay bestie, so this is a page from the Kernel API Manual, and it's literally about finding the next cpu that's chillin' in both of your masks at the same time 💅 no cap, it's giving intersection energy.

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🌸 NAME 🌸

cpumask_next_and — get the next cpu in *src1p & *src2p

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🎀 SYNOPSIS 🎀

unsigned int cpumask_next_and (int n , const struct cpumask *src1p ,
       const struct cpumask *src2p );

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🦋 ARGUMENTS 🦋

• n — the cpu prior to the place to search (i.e. return will be > n) — think of it as "start looking right after this one, bestie" 👀
• src1p — the first cpumask pointer 💖
• src2p — the second cpumask pointer 💖

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🔥 RETURN 🔥

>= nr_cpu_ids if no further cpus set in both. basically if there's nothing left in the overlap, you get a value that's out of range and that's your cue that the vibe check failed 😭 periodt.

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🌈 SEE ALSO 🌈

okay this list is lowkey iconic, it's the whole cpumask friend group 🫶 — from the kernel file ./include/linux/cpumask.h:

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_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_set_cpu(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, they really said "include the entire squad" and honestly? we stan 💀👑

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💌 and that's the whole page, bestie! it lives in ./include/linux and this version is dated October 2026 — go forth and find your next matching cpu, main character energy only 🧚💜