__request_region(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 __request_region — create a new busy resource region 💅

okay so this page is __request_region(9) from the Kernel API Manual, and honestly bestie, it's a little one but it matters. It's the lowkey workhorse that stakes a claim on a chunk of a resource tree. Let's get into it 🎀

✨ SYNOPSIS ✨

struct resource * __request_region (struct resource *parent ,
       resource_size_t start , resource_size_t n , const char *name , int flags
       );

that's the whole vibe: you hand it a parent, a start, a size, a name, and some flags, and it hands you back a struct resource *. slay 🔥

🦋 ARGUMENTS 🦋

  • parent — the parent resource descriptor 💖 this is the region you're carving your new busy region out of, iykyk.
  • start — the resource start address ⭐ like, where your region begins.
  • n — the resource region size 🌸 how much space you're claiming, not where it ends. size, bestie, not end address.
  • name — the reserving caller's ID string 🏷️ your little nametag on the region so future you (and everyone else) knows who grabbed it.
  • flags — IO resource flags 🚩 the flags that ride along with the IO resource.
ngl, the argument list is short but every single one of these is doing real main character work. don't skip one 🙈

👑 SEE ALSO 👑

lowkey the best part, because it's a whole group chat of resource-management besties:

also, the kernel file it lives in is ./kernel/resource.c 📁 — that's the address, go say hi 💜

and that's the whole page, periodt. 💅

cute little sign-off time: this one's from the ./kernel manual, dated October 2026, and it's version __request_region(9) — shipped with the Kernel API Manual 🫶 go forth and reserve responsibly, bestie ✨🌈

📦 where this page comes from