iopt_area_fill_domains(9)

📦 version 7.3.1, in nixpkgs unstable

💅 iopt_area_fill_domains(9) — the Kernel API Manual glow-up ✨

okay so bestie, you're reading iopt_area_fill_domains(9) from the Kernel API Manual, and honestly? it's giving "small function, big responsibilities." ngl it's a little icon and it deserves your attention fr fr 🎀

✨ NAME ✨

iopt_area_fill_domains — install PFNs into the area's domains 🫶

🌸 SYNOPSIS 🌸

int iopt_area_fill_domains (struct iopt_area *area , struct iopt_pages
*pages );

like yes, that's the whole signature, and yes, the line break in the original is exactly like that. we don't fix it, we respect it. 💅

🦋 ARGUMENTS 🦋

  • area — the area we're acting on. the main character, lowkey.
  • pages — the pages associated with the area, and heads up: area->pages is NULL at this point. that's not a bug, that's just the vibe check passing. 🙈

💖 DESCRIPTION 💖

so this one gets called during area creation. the area is freshly created — brand new, off the presses, and it is not inserted in the domains_itree yet. it's in its pre-insertion era. ⭐

what happens: PFNs are read and loaded into every domain held in the area's io_pagetable, and then the area gets installed in the domains_itree. that's the whole arc — read, load, install. character development honestly. 🧚

⚠️ and if it fails? on failure all domains are left unchanged. no partial chaos, no half-filled mess, we keep it clean. periodt. 🔥

🌈 SEE ALSO 🌈

the kernel file for this one lives at ./drivers/iommu/iommufd/pages.c, and here's the whole friend group, no gatekeeping 👑

and that's the page bestie!! 🍓 source/version: ./drivers/iommu/iommufd, dated October 2026, and the title is iopt_area_fill_domains(9) in case you forgot already (you didn't, you're doing amazing). mwah, go read the next manpage 💜🦋💅

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