iopt_unfill_domain(9)

✨ iopt_unfill_domain ✨

Okay bestie, welcome to iopt_unfill_domain(9) from the Kernel API Manual — yes, section 9, we're in kernel-devs-only territory and you're gonna slay 💅

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🌸 NAME 🌸

iopt_unfill_domain — unfill a domain with PFNs, literally what it says on the tin 🎀

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🦋 SYNOPSIS 🦋

void iopt_unfill_domain (struct io_pagetable *iopt , struct iommu_domain
*domain );

That's the whole signature, no cap. Returns void — it gives you nothing back, it just does the thing 🫶

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💖 ARGUMENTS 💖

• iopt — the io_pagetable to act on. This is the main character of the operation, the table we're working in 👑
• domain — the domain to unfill. She's the one getting emptied out, no thoughts just vibes 😭

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🔥 DESCRIPTION 🔥

So here's the tea ☕ — you use this one when you're removing a domain from the iopt. Every single area in the iopt will be unmapped from the domain. All of them. The whole roster. Not a vibe check, an actual full unmapping 💀

🚨 PRE-REQ ALERT 🚨 the domain must already be removed from the domains xarray before you call this. Like, that's a hard requirement, not a suggestion. Do it in the wrong order and that's on you 🙈

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👀 SEE ALSO 👀

• Kernel file ./drivers/iommu/iommufd/io_pagetable.c — go read the source, iykyk 📖
• iopt_map_user_pages(9)
• iopt_map_file_pages(9)
• iopt_unmap_iova(9)
• iopt_fill_domain(9)
• iopt_area_split(9)

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And that's the whole page, bestie 💜 this little gem comes to you from ./drivers/iommu/iommufd, dated October 2026 — go forth and unfill responsibly, mwah 🧚💖