ladder_do_selection(9)

💅 ladder_do_selection(9) — Kernel API Manual, bestie edition 🎀

okay so this is a page from the Kernel API Manual, and today's main character is ladder_do_selection(9). buckle up, it's short but it matters. ✨

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🌸 NAME 🌸

ladder_do_selection — prepares private data for a state change

like, it's the lil backstage crew getting everything ready before the outfit change, ykwim? 💅

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✨ SYNOPSIS ✨

void ladder_do_selection (struct cpuidle_device *dev , struct
ladder_device *ldev , int old_idx , int new_idx );

no return value, it's giving "void and unbothered" 🫶

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🦋 ARGUMENTS 🦋

• dev — the CPU 👑 this is the star of the show, the actual processor we're talking about
• ldev — the ladder device 🪜 the ladder-governor-specific buddy that hangs out with the CPU
• old_idx — the current state index 📍 where we're at right now, the "before" pic
• new_idx — the new target state index 🎯 where we're headed, the "after" pic

literally four arguments, all accounted for, no notes 💖

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/cpuidle/governors/ladder.c 📄
• ladder_select_state(9)
• ladder_enable_device(9)
• ladder_reflect(9)
• init_ladder(9)

go read those too, they're all in the same friend group fr fr 🧚

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ngl, no cap: this page is short and sweet, but every single detail above is the whole page — don't skip the arguments, they're the moment 💀

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and that's the whole vibe check 🌈 this one lives in ./drivers/cpuidle/governors, dated October 2026 — mwah, send it to your bestie, periodt. 💜🎀🦋