fdt_num_mem_rsv(9)

📦 version 7.3.1, in nixpkgs unstable

💖 fdt_num_mem_rsv 💖

okay bestie, so this is a page from the Kernel API Manual — section 9, kernel developer vibes only — and it's all about fdt_num_mem_rsv. literally the tiniest little function with the biggest "how many are there?" energy. let's get into it 🎀

✨ NAME ✨

fdt_num_mem_rsv — retrieve the number of memory reserve map entries

like, it counts them. that's the whole job. and it ate. 💅

🌸 SYNOPSIS 🌸

int fdt_num_mem_rsv (const void *fdt );

🦋 ARGUMENTS 🦋

  • fdt — pointer to the device tree blob

that's it. one (1) argument. main character energy honestly 👑

⭐ DESCRIPTION ⭐

Returns the number of entries in the device tree blob's memory reservation map.

and here's the important little detail, so listen up bestie — this count does not include the terminating 0,0 entry, and it also doesn't include any other (0,0) entries that are reserved for expansion. so like, those are the "reserved for later, don't count me" girlies 🙈

🌈 RETURN 🌈

the number of entries 🎀

🫶 SEE ALSO 🫶

Kernel file ./scripts/dtc/libfdt/libfdt.h, plus literally the entire libfdt friend group — no cap, they all showed up to the group chat:

iykyk 💜

ngl there are no warnings, no bugs, no exit statuses, and no environment variables on this page — it's a clean little icon and we love that for it 🌸

mwah 💋 this cutie lives in ./scripts/dtc/libfdt, the date on the original page is October 2026, and it's from the Kernel API Manual, fdt_num_mem_rsv(9). periodt. 🎀✨

📦 where this page comes from