cpumask_parselist_user(9)

💖 cpumask_parselist_user 💖

Kernel API Manual check-in, bestie: this is the little helper that extracts a cpumask from a user string, and it’s giving “small function, big main character energy.” ✨

🌸 NAME 🌸

cpumask_parselist_user — extract a cpumask from a user string. Periodt. 💅

✨ SYNOPSIS ✨

int cpumask_parselist_user (const char __user *buf , int len , struct
       cpumask *dstp );

🎀 ARGUMENTS 🎀

Okay so it takes three things, no cap:

• buf — the buffer to extract from. 🫶
• len — the length of the buffer. 📏
• dstp — the cpumask to set. 🎯

🔥 RETURN 🔥

The return vibe check: -errno, or 0 for success. That’s the whole tea. ☕💖

🦋 SEE ALSO 🦋

Kernel file ./include/linux/cpumask.h — yes, the whole cpumask cinematic universe lives there. 👑

• The refs: 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_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_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).

Source/version: ./include/linux · date: October 2026 · page: cpumask_parselist_user(9). Bye bestie, go parse something cute 💅💖