irq_matrix_alloc(9)

📦 version 7.3.1, in nixpkgs unstable

💅 irq_matrix_alloc(9) — a Kernel API Manual moment 🎀

ok so bestie, welcome to irq_matrix_alloc(9), straight out of the Kernel API Manual. this is the page for allocating a regular interrupt in a CPU map, and honestly? she's iconic, she's focused, she does one thing. periodt. ✨

🌸 NAME 🌸

irq_matrix_alloc — allocate a regular interrupt in a CPU map 🦋

like. that's the whole vibe. one job. no cap.

⭐ SYNOPSIS ⭐

int irq_matrix_alloc (struct irq_matrix *m , const struct cpumask *msk ,
bool reserved , unsigned int *mapped_cpu );

that's the whole signature, copy it exactly, do NOT freestyle it, i'm begging 🙈

💖 ARGUMENTS 💖

ok so here's who's on the cast list:

  • m — the matrix pointer 🧚 this is the actual matrix you're working on, bestie. the main character.
  • msk — which CPUs to search in 👑 like, the search zone. the eligible pool. you pick where she's allowed to look.
  • reserved — allocate previously reserved interrupts 💜 set this and you're going shopping in the reserved aisle specifically.
  • mapped_cpu — pointer to store the CPU for which the irq was allocated 📍 this is where the answer goes. it gets written to. that's the whole point of it.
ngl the mapped_cpu one is lowkey the most important vibe-wise — if you're not passing a real pointer, what are you even doing 💀

🔥 SEE ALSO 🔥

the whole friend group, fr fr — it's all in the kernel file ./kernel/irq/matrix.c:

the way that's a whole squad 😭🫶 go read them, iykyk.

ok that's the page!! mwah 💋 this one came to you from the source path ./kernel/irq, dated October 2026, living under the Kernel API Manual banner — and that's the cute lil sign-off, bestie. go allocate something pretty. 🌈💅
📦 where this page comes from