irq_matrix_remove_reserved(9)

📦 version 7.3.1, in nixpkgs unstable

💅 irq_matrix_remove_reserved — a Kernel API Manual moment ✨

ok so you're in the Kernel API Manual bestie, and we're talking about irq_matrix_remove_reserved(9). yes it's a mouthful, no you don't have to say it out loud 🫶

🌸 NAME 🌸

irq_matrix_remove_reserved — Remove interrupt reservation. that's it, that's the whole vibe. she removes reservations 💅

🎀 SYNOPSIS 🎀

void irq_matrix_remove_reserved (struct irq_matrix *m );

🦋 ARGUMENTS 🦋

  • m — Matrix pointer. yeah, just the pointer to the matrix. she needs to know which matrix we're talking about, obviously 🌈

✨ DESCRIPTION ✨

okay so listen 👑 — this one is merely a book keeping call. like, that's literally what the docs say, no cap. it's not out here allocating anything, it's not touching real vectors, it's just doing the paperwork 📋

what it does: it decrements the number of globally reserved interrupt bits. one lil number goes down. that's the whole job. she's an accountant with main character energy 🧮💖

and why would you need that? because this is used to undo irq_matrix_reserve when the interrupt was never in use and a real vector got allocated, which undid the reservation. so like, the reservation got cancelled by real life, and now this call makes the books match reality. symmetry. balance. slay 🦋

ngl if you call this thinking it's gonna free a vector or do something spicy — it won't. book keeping only, bestie. that's the whole assignment 🙈

⭐ SEE ALSO ⭐

Kernel file ./kernel/irq/matrix.c — go read the source, iykyk 💜

and the whole friend group:

🍓 that's the page!! mwah 💋

okay and for the sign-off — this lil beauty lives in ./kernel/irq, it's dated October 2026, and yeah the page name is irq_matrix_remove_reserved(9) in case you forgot already (i did 😭). bye bestie, go decrement something responsibly 🌈✨🎀

📦 where this page comes from