memblock_is_region_reserved(9)

📦 version 7.3.1, in nixpkgs unstable

💖 memblock_is_region_reserved(9) 💖

okay so bestie, welcome to the Kernel API Manual 🎀 — yes the actual kernel, not your laptop's kernel of truth or whatever. this one's a little bool-returning darling from the memblock world and honestly? she's iconic for it.

✨ NAME ✨

memblock_is_region_reserved — the "wait, is somebody already sitting there?" check for reserved memory 🪑💅

🌸 SYNOPSIS 🌸

bool __init_memblock memblock_is_region_reserved (phys_addr_t base ,
       phys_addr_t size );

like, she takes two args, returns a bool, and she's marked __init_memblock so you know she lives in init-land. periodt. 👑

🦋 ARGUMENTS 🦋

  • base — the base of the region you wanna check 🔍 (like, where does your little region start)
  • size — the size of the region you're checking 📏 (and yes she needs it, the region's a range, not a single point)

💜 DESCRIPTION 💜

So the whole vibe here: she checks if the region [base, base + size) intersects a reserved memory block. that's it. that's the function. 🫶

notice the half-open interval, bestie — [base, base + size) — the opening bracket is closed (base included) and the closing one is open (base + size not included). math girlies get it. no cap. 🔥

⭐ RETURN ⭐

  • True if they intersect 💥 — your region and a reserved block are lowkey overlapping
  • False if not 🙈 — you're in the clear, go off

🌈 SEE ALSO 🌈

okay this list is LONG, so buckle up bestie, we're going through the whole memblock friend group 🧚‍♀️:

she really said "and here's everyone I know" 😭💀 but honestly? main character energy for knowing all of them.

kisses from the ./mm directory 💋 — that's the source/version bestie, and she's dated October 2026 because she's from the future and she's still serving 🕰️✨ slay. mwah, see u in the next manpage 🫶💖

📦 where this page comes from