sba_unmap_sg(9)

📦 version 7.3.1, in nixpkgs unstable

💅 sba_unmap_sg(9) — Kernel API Manual, but make it make sense 🫶

okay so bestie, we're in the Kernel API Manual today and the star of the show is sba_unmap_sg(9) — yes, the unmap of a Scatter/Gather list, we love a cleanup arc ✨

🌸 NAME 🌸

sba_unmap_sg — unmap Scatter/Gather list. that's it, that's the whole vibe. she unmaps. she's done. 💅

🎀 SYNOPSIS 🎀

void sba_unmap_sg (struct device *dev , struct scatterlist *sglist ,
int nents , enum dma_data_direction direction , unsigned long attrs );

literally just copy that exactly, no cap, don't be editing the signature 🙈

🦋 ARGUMENTS 🦋

  • dev — the instance of PCI owned by the driver that's asking. like, who's the driver? this is her PCI. main character energy 💖
  • sglist — array of buffer/length pairs. a whole little lineup of them 🍓
  • nents — number of entries in list. count 'em, bestie 🔥
  • direction — R/W or both. she can go either way, queen behavior 👑
  • attrs — attributes. the little extras, iykyk ⭐

✨ DESCRIPTION ✨

See Documentation/core-api/dma-api-howto.rst — that's the lore drop, go read it, it's giving required reading 🧚

💜 SEE ALSO 💜

Kernel file ./drivers/parisc/sba_iommu.c and honestly the whole friend group 🫶:

ngl, all these sba_* friends are literally the group chat, and sba_unmap_sg is the one who actually follows through 💀 no cap, stan her.

okay that's the page!! this one lives in ./drivers/parisc, and it's dated October 2026 — yes, future-dated, she's ahead of her time 🦋💖 slay, periodt ✨

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