folio_batch_add(9)

💅 folio_batch_add(9) — like, the Kernel API Manual, bestie

okay so real talk, this one is a tiny little function from the kernel API manual and honestly it's giving "small but mighty" 🦋. It's the kind of thing you call a million times and never think about, and yet — no cap — she's iconic.

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✨ NAME ✨

folio_batch_add — literally just adds a folio to a batch. that's it. that's the whole job. and she does it perfectly 💅

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🌸 SYNOPSIS 🌸

unsigned folio_batch_add (struct folio_batch *fbatch , struct folio *folio );

look at her. two args, returns an unsigned. no drama. main character energy fr fr 👑

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🎀 ARGUMENTS 🎀

• fbatch — the folio batch. the actual pile of folios you're stuffing things into. she's the container, the vibe check, the whole venue 🫶
• folio — the folio you're adding. the new arrival. the guest of honour arriving at the party 🌈

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💖 DESCRIPTION 💖

so the folio gets added to the end of the batch — like, appended, queued up, behind whatever was already there. no skipping the line, no cutting 👑

but listen, and this is the important part: the batch must have been initialised beforehand using folio_batch_init. like, you can't just roll up with an uninitialised batch and start tossing folios in there. that's not the move. do the folio_batch_init first, then come add your folios 💀

lowkey do not skip the init step. that's the whole requirement. it's stated right there and we're respecting it 🙈

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⭐ RETURN ⭐

the function returns the number of slots still available — so after the add, you get told how much room is left in the batch. it's like the little counter on the app telling you how many seats are still free 🎟️✨

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🦋 SEE ALSO 🦋

• Kernel file ./include/linux/folio_batch.h
• struct folio_batch(9)
• folio_batch_init(9)
• folio_batch_next(9)

go read folio_batch_init(9) first, bestie, i'm literally begging 🧚💜

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and that's the page!! source & version business: ./include/linux, dated October 2026 — so mark your calendars, mwah 💋🌸 stay hydrated, initialise your batches, and slay 💅✨