cpumask_andnot(9)

💅 cpumask_andnot(9) 💅

Okay so welcome to the Kernel API Manual, bestie! This page is all about cpumask_andnot, and the name line is literally the math: *dstp = *src1p & ~*src2p. Iconic behavior. ✨

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🌸 NAME 🌸

cpumask_andnot — *dstp = *src1p & ~*src2p 🎀

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🦋 SYNOPSIS 🦋

Here’s the signature, copied exactly so nobody has to squint:

bool cpumask_andnot (struct cpumask *dstp , const struct cpumask *src1p
       , const struct cpumask *src2p );

Three pointers, one bool, zero drama. 💅

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🎀 ARGUMENTS 🎀

• dstp — the cpumask result. This is where the answer goes, bestie.
• src1p — the first input. Input numero uno.
• src2p — the second input. Input numero dos.

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🔥 RETURN 🔥

It returns false if *dstp is empty, and otherwise it returns true. Empty = false, not empty = true. ✅

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🌈 SEE ALSO 🌈

Kernel file: ./include/linux/cpumask.h. Go give the related-calls squad some love: 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_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_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).

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made with 💖 from ./include/linux · October 2026 🫶