folio_file_pfn(9)

✨ folio_file_pfn — Kernel API Manual, bestie edition ✨

okay so welcome to the Kernel API Manual, page folio_file_pfn(9). This one is short, sweet, and fully main-character — let’s get into it 💅

🌸 NAME 🌸

folio_file_pfn — like folio_file_page, but return a pfn. no cap, that’s the whole name vibe 💖

🦋 SYNOPSIS 🦋

kvm_pfn_t folio_file_pfn (struct folio *folio , pgoff_t index );

the way this signature just sits there being all kvm_pfn_t and iconic — we love to see it 🎀

🎀 ARGUMENTS 🎀

• folio — the folio which contains this index. literally the folio holding the index you’re asking about, bestie.
• index — the index we want to look up. the specific one you’re hunting for 👀

🔥 RETURN 🔥

The pfn for this index. that’s the return value, periodt — it gives you back the pfn for this index and that’s it 💖

🌈 SEE ALSO 🌈

• Kernel file ./virt/kvm/guest_memfd.c — go peek if you want the neighborhood lore, iykyk 🫶

kisses and sparkles from the ./virt/kvm source corner, October 2026 edition, page folio_file_pfn(9) — bye bestie 🫶💖