folioq_folio_order(9)

💖 NAME 💖

okay so bestie, this is folioq_folio_order(9) from the Kernel API Manual, and it's giving exactly one iconic job: get the order of a folio from a folio queue segment. That's the whole vibe. 💅

✨ SYNOPSIS ✨

unsigned int folioq_folio_order (const struct folio_queue *folioq ,
unsigned int slot );

🎀 ARGUMENTS 🎀

• folioq — the segment to access. It's the folio queue segment you're working with, bestie.
• slot — the folio slot to access. The exact slot, no cap.

🦋 DESCRIPTION 🦋

so like, this function retrieves the order of the folio in the specified slot from a folio queue segment. Easy. But — and this is the important part — no bounds check is made. None. Zero. So don't expect it to validate your slot for you. 😭

Also: if the slot hasn't been added into yet, the order returned will be 0. That's the rule. ⭐

⚠️ no bounds check happens here, so keep your vibes valid and don't assume the function is checking anything for you. 💀

🌈 SEE ALSO 🌈

Kernel file: ./include/linux/folio_queue.h

go read the whole friend group too, they're all linked here:

• folioq_init(9)
• folioq_nr_slots(9)
• folioq_count(9)
• folioq_full(9)
• folioq_is_marked(9)
• folioq_mark(9)
• folioq_unmark(9)
• folioq_is_marked2(9)
• folioq_mark2(9)
• folioq_unmark2(9)
• folioq_append(9)
• folioq_append_mark(9)
• folioq_folio(9)
• folioq_folio_size(9)
• folioq_clear(9)

xoxo bestie 💖 source/version: ./include/linux · date: October 2026 · page: folioq_folio_order(9) 🫶