arm_iommu_sy...g_for_device(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 arm_iommu_sy...g_for_device(9) 🌸

okay bestie, welcome to the Kernel API Manual 💖 — yes we're reading manpages together now, this is our era, and honestly? this one's short and sweet so you're gonna slay it ✨

💅 NAME 💅

arm_iommu_sync_sg_for_device — and that's literally it, that's the whole name, no description attached 🙈 (the manpage said nothing else, so neither will I — no cap, I'm not out here inventing lore 🫶)

✨ SYNOPSIS ✨

void arm_iommu_sync_sg_for_device (struct device *dev , struct
scatterlist *sg , int nents , enum dma_data_direction dir );

that's the whole vibe check right there 🔥 returns void, takes four things, done. iconic behavior honestly 👑

🎀 ARGUMENTS 🎀

  • dev — a valid struct device pointer, like, it has to actually be valid bestie, don't be out here passing garbage 🌸
  • sg — the list of buffers, i.e. your scatterlist situation 🦋
  • nents — how many buffers you're mapping — and listen, this is the number returned from dma_map_sg, so don't just make one up 😭
  • dir — the DMA transfer direction, and it's gotta be the same one you passed to dma_map_sg 💀 like, matching. consistency. periodt.
fr fr, keep your nents and your dir in sync with the original dma_map_sg call — the manpage is very much pointing at that and I'm not gonna pretend otherwise 💜

🧚 SEE ALSO 🧚

it all lives in the kernel file ./arch/arm/mm/dma-mapping.c and the whole friend group is:

go read the whole squad, iykyk 💫

and that's the page!! 🌈 sending you off with the cutest little sign-off: this one's filed under ./arch/arm/mm, dated October 2026, and it's from the Kernel API Manual — main character documentation energy only 👑💖 mwah, go sync those scatterlists bestie 🎀🫶

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