irq_alloc_matrix(9)

irq_alloc_matrix(9) 👑

okay bestie, this page is straight from the Kernel API Manual, and it's giving “small but crucial kernel setup moment” energy. We're talking about irq_alloc_matrix, and yes, it's iconic in a very specific way.

💖 NAME 💖

irq_alloc_matrix — allocate an irq_matrix structure and initialize it. That's the whole vibe: it makes the thing and gets it ready to go. Slay.

✨ SYNOPSIS ✨

Here's the signature, verbatim, because we do not mess with signatures 💀:

struct irq_matrix * irq_alloc_matrix (unsigned int matrix_bits ,
unsigned int alloc_start , unsigned int alloc_end );

🌸 ARGUMENTS 🌸

• matrix_bits — the number of matrix bits. Yes bestie, that's the count.
• alloc_start — the bit where the allocation search starts. Like the starting line for the search.
• alloc_end — the bit where the allocation search ends, i.e first invalid bit. So it's the boundary, not a valid bit to land on.

🦋 SEE ALSO 🦋

Kernel file ./kernel/irq/matrix.c is the spot, and you're gonna wanna know these besties too:

• irq_matrix_online(9)
• irq_matrix_offline(9)
• irq_matrix_assign_system(9)
• irq_matrix_reserve_managed(9)
• irq_matrix_remove_managed(9)
• irq_matrix_alloc_managed(9)
• irq_matrix_assign(9)
• irq_matrix_reserve(9)
• irq_matrix_remove_reserved(9)
• irq_matrix_alloc(9)
• irq_matrix_free(9)
• irq_matrix_available(9)
• irq_matrix_reserved(9)
• irq_matrix_allocated(9)
• irq_matrix_debug_show(9)

mwah 💋 — this page lives at ./kernel/irq, dated October 2026, and it's irq_alloc_matrix(9) to the very end. periodt. 🎀