sg_mark_end(9)

🎀 sg_mark_end(9) — like, the Kernel API Manual, bestie 🎀

okay so picture this: you're reading the Kernel API Manual, section 9, and the page you've landed on is all about sg_mark_end. yes it's a scatterlist thing. yes you're gonna get it. let's go 💅

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✨ NAME ✨

sg_mark_end — the little function that says "this is the end, bestie, no more entries after this one" 🛑

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🌸 SYNOPSIS 🌸

void sg_mark_end (struct scatterlist *sg );

that's it. that's the whole signature. one function, one pointer, zero drama 🫶

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🦋 ARGUMENTS 🦋

• sg — the SG entry (a Scatterlist, literally) you're about to flag as the last one. this is the girl. the main character of the operation 👑

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💖 DESCRIPTION 💖

So what does it actually do? It marks the sg entry you passed in as the termination point for the sg table. Basically you're putting a little "the end ✌️" sticker on it so everyone knows the list stops here.

And the receipts? If you hit this entry with a call to sg_next, it'll come back with NULL. no more entries, no cap. that's the whole vibe check 🔥

ngl it's a tiny function, but it's iconic — without it your scatterlist would just keep going forever like a group chat with no one leaving 😭

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⭐ SEE ALSO ⭐

• Kernel file ./tools/virtio/linux/scatterlist.h
• sg_assign_page(9)
• sg_set_page(9)
• sg_chain(9)
• sg_unmark_end(9) — the one that takes the sticker back off, iykyk 🙈

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and that's the page!! 🌈 this lil gem lives in ./tools/virtio/linux, and the version we're looking at is dated October 2026 — so go forth, mark your ends, and slay your scatterlists, bestie 💜🧚🍓