cec_add_elem(9)

💅 cec_add_elem(9) — the Kernel API Manual page, but make it make sense

okay so bestie, welcome to the Kernel API Manual entry for cec_add_elem ✨ this is a tiny little function with a big job and honestly? it's giving "quiet luxury." let's get into it 🎀

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🌸 NAME 🌸

cec_add_elem — add an element to the CEC array. that's it. that's the whole vibe. 💖

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✨ SYNOPSIS ✨

int cec_add_elem (u64 pfn );

like, look at that signature. int going out, u64 coming in. main character energy fr fr 👑

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🦋 ARGUMENTS 🦋

• pfn — the page frame number to insert. that's the thing you're feeding into the CEC array, bestie. it's a u64, so it's got range, it's got presence, it's iconic 💅

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💜 DESCRIPTION 💜

so what actually comes back out? the return values, and i need you to memorize these because they all mean different things 🫶

• <0 — on error 😭 like, something went wrong, negative number, we're in our flop era
• 0 — on success 🎉 slay, it worked, no notes
• >0 — when the inserted pfn was offlined 👀 so it went in, but the pfn was already offlined — positive value tells you that little detail

lowkey such a clean little contract: negative = bad, zero = good, positive = good-but-with-a-plot-twist 🌈

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🧚 SEE ALSO 🧚

• Kernel file ./drivers/ras/cec.c — go read the source, iykwim 💀 it's all there

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ngl bestie, if you're poking at cec_add_elem, you're already deep in the RAS / CEC lore and i'm obsessed for you 🔥

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and that's the page!! 🌸 this one's from ./drivers/ras, dated October 2026, so yeah — absolute vintage. go forth and add your elements, queen 👑💖

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