__SCX_CMASK_DEFINE(9)

✨ __SCX_CMASK_DEFINE ✨

okay bestie, gather round 💖 this is a page from the Kernel API Manual and it's genuinely so cute — it's all about defining an on-stack cmask with explicit storage capacity. no cap, it's a little macro with main character energy 👑

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🎀 SYNOPSIS 🎀

__SCX_CMASK_DEFINE (NAME , BASE , NR_CIDS , ALLOC_CIDS );

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🌸 ARGUMENTS 🌸

• NAME — the variable name you're defining, periodt. that's literally its whole job 💅
• BASE — the first cid of the active range 🔥
• NR_CIDS — the length of the active range, iykyk 📏
• ALLOC_CIDS — the storage capacity in cids, and it's gotta be at least NR_CIDS — no shrinking below that, fr fr ⚠️

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🦋 DESCRIPTION 🦋

so NAME aliases zero-initialized storage ✨ with the active range set to [BASE, BASE + NR_CIDS). that's it, that's the vibe 🫶

and then later, when you want a different shape? use scx_cmask_reframe to reshape it — up to ALLOC_CIDS, bestie 💜

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🌈 SEE ALSO 🌈

• Kernel file ./kernel/sched/ext/types.h — SCX_CMASK_DEFINE(9), SCX_CMASK_DEFINE_SHARD(9) 👑

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lowkey obsessed with how tidy this macro is. go forth and define your cmasks, icon 🧚

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and that's the whole page, bestie 🍓 sign-off time: this one lives in ./kernel/sched/ext, and it's dated October 2026 — 💖 bye babes 💖