irq_domain_push_irq(9)

📦 version 7.3.1, in nixpkgs unstable

💅 irq_domain_push_irq — the Kernel API Manual page, bestie edition ✨

okay so this is a page from the Kernel API Manual, and today's main character is irq_domain_push_irq(9) 🎀 she's a lil function with a big job and honestly? she ate.

🌸 NAME 🌸

irq_domain_push_irq — push a domain in to the top of a hierarchy. that's it, that's the vibe 🦋

✨ SYNOPSIS ✨

int irq_domain_push_irq (struct irq_domain *domain , int virq , void
*arg );

like, the signature is right there, copy it exactly, no cap 📋

🫶 ARGUMENTS 🫶

  • domain — the domain you're pushing. yes, she's the one getting shoved to the top of the hierarchy, and she's thriving about it 👑
  • virq — the irq you're pushing the domain in to. that's her target, her chosen one 💖
  • arg — this gets passed straight to the irq_domain_ops alloc function. so like, it's not decorative, it actually gets used 🍓

💫 DESCRIPTION 💫

okay so picture this: you already got an existing irqdomain hierarchy, maybe you got it from a call to pci_enable_msix, and now you wanna add an additional domain to the head of the processing chain. that's her. that's what this does. main character energy at the front of the line 💅

⚠️ real talk though — this must be called before request_irq has been called. like, before. not after. not during. before. don't test her 🙈

🔥 SEE ALSO 🔥

the whole squad, fr fr — kernel file ./kernel/irq/irqdomain.c:

and that's the page!! 🧚 source is ./kernel/irq, dated October 2026, and it's literally titled irq_domain_push_irq(9) — go forth and push those domains, bestie, ily 💜

📦 where this page comes from