unpin_user_folio(9)

✨ unpin_user_folio(9) ✨

okay bestie, welcome to the Kernel API Manual 💅 this is the page for unpin_user_folio(9) and honestly it's giving short-and-sweet main character energy 🎀

🌸 NAME 🌸

unpin_user_folio — release pages of a folio 🫶

🦋 SYNOPSIS 🦋

void unpin_user_folio (struct folio *folio , unsigned long npages );

like look at that signature, no notes, iconic ✨

💖 ARGUMENTS 💖

• folio — pointer to the folio that's getting released, so basically the address of the thing we're unpinning 💫
• npages — the number of pages of that same folio, i.e. how many of its pages we're letting go 🔥

👑 DESCRIPTION 👑

Release npages of the folio 🎀

that's it, that's the whole vibe. you hand it a folio and you hand it a number, and it releases that many pages of it. periodt 💅

🌈 SEE ALSO 🌈

Kernel file ./mm/gup.c — go read it, iykyk 👀 — plus literally all of these besties:

• try_grab_folio(9)
• unpin_user_page(9)
• unpin_folio(9)
• folio_add_pin(9)
• unpin_user_pages_dirty_lock(9)
• unpin_user_page_range_dirty_lock(9)
• unpin_user_pages(9)
• unpin_folios(9)
• try_grab_folio_fast(9)
• follow_page_mask(9)
• __get_user_pages(9)
• fixup_user_fault(9)
• populate_vma_page_range(9)
• fault_in_writeable(9)
• fault_in_subpage_writeable(9)
• fault_in_readable(9)
• get_dump_page(9)
• get_user_pages_remote(9)
• get_user_pages(9)
• get_user_pages_fast_only(9)
• get_user_pages_fast(9)
• pin_user_pages_fast(9)
• pin_user_pages_remote(9)
• pin_user_pages(9)
• memfd_pin_folios(9)
• folio_add_pins(9)

bestie reminder from the fine print at the bottom: this one lives in ./mm and it's dated October 2026 ⭐ so like, that's the source and the date, go off 💜