scx_cmask_empty(9)

💖 scx_cmask_empty(9) 💖

okay so bestie, welcome to the Kernel API Manual page for scx_cmask_empty(9) — manual name folded in right at the top, we're cute like that. This is the little bool-checking icon you call when you need to know if a cmask is empty, and yes it ate. 💅

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🌸 NAME 🌸

• scx_cmask_empty — Test whether @m has no bits set. periodt.

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✨ SYNOPSIS ✨

bool scx_cmask_empty (const struct scx_cmask *m );

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🎀 ARGUMENTS 🎀

• m — the cmask to test, bestie. That's the one we're checking.

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🦋 DESCRIPTION 🦋

Return true iff m's active range has no bits set. Translation: if that active range is completely clear, you get true — and the iff is doing important work here, so don't sleep on it. 😭✨

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👑 SEE ALSO 👑

Kernel file ./kernel/sched/ext/cid.c is the source gossip, and here's the whole friend group:

• scx_cid_publish_tables(9)
• scx_cid_retire_tables(9)
• scx_cid_init(9)
• scx_cmask_clear(9)
• scx_cmask_fill(9)
• scx_bpf_cid_override(9)
• scx_bpf_cid_to_cpu(9)
• scx_bpf_cpu_to_cid(9)
• scx_cmask_subset(9)
• scx_bpf_cid_topo(9)
• scx_cmask_ref_init(9)
• scx_cmask_ref_init_kern(9)
• scx_cmask_ref_shard(9)
• scx_cmask_ref_or(9)
• scx_cmask_ref_copy(9)
• scx_cmask_ref_from_cpumask(9)

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Bye bestie 🫶 — source/version ./kernel/sched/ext, date October 2026, page scx_cmask_empty(9), signing off 💅✨🌈