ata_unpack_xfermask(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ata_unpack_xfermask(9) — the 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 ata_unpack_xfermask(9). she's a tiny little helper living in ./drivers/ata/libata-core.c and honestly? she ate. let's get into it 🎀

✨ NAME ✨

ata_unpack_xfermask — Unpack xfer_mask into pio, mwdma and udma masks

like literally, that's the whole job. one mask goes in, three masks come out. slay.

🌸 SYNOPSIS 🌸

void ata_unpack_xfermask (unsigned int xfer_mask , unsigned int
*pio_mask , unsigned int *mwdma_mask , unsigned int *udma_mask );

no cap, she returns void — this function does not hand you anything back. the results just land in your pointers. main character behavior tbh 💅

🦋 ARGUMENTS 🦋

  • xfer_mask — the xfer_mask you're unpacking. this is the one getting taken apart, bestie.
  • pio_mask — the resulting pio_mask lands here 🫶
  • mwdma_mask — the resulting mwdma_mask goes here ✨
  • udma_mask — and the resulting udma_mask goes here 🌈

💖 DESCRIPTION 💖

okay so here's the vibe: ata_unpack_xfermask unpacks xfer_mask into pio_mask, mwdma_mask and udma_mask. that's it, that's the whole thing, and she does it flawlessly 🔥

and the iconique little detail? any NULL destination masks are just... ignored. not mad about it, not throwing an error, just 🧚 minding her own business. so if you only care about one or two of the three, pass NULL for the rest and she literally does not care. periodt.

👑 SEE ALSO 👑

Kernel file ./drivers/ata/libata-core.c — and here's the whole friend group, fr fr (yes, all of them, we're not skipping anyone):

bestie note: there's no exit status, no signals, no env vars, no bugs section here — this page is short and sweet, and honestly? we respect the minimalism 💅

and that's the whole page 🎀 sourced from ./drivers/ata, October 2026, version ata_unpack_xfermask(9) — ily, go unpack some masks, mwah 💖✨🦋

📦 where this page comes from