generic_handle_domain_irq(9)

💅 generic_handle_domain_irq(9)

okay bestie, welcome to the Kernel API Manual — this one's literally a whole page about generic_handle_domain_irq(9), and it's giving "short but important" energy. no cap, it's a tiny function with big main character vibes ✨

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🦋 NAME

generic_handle_domain_irq — Invoke the handler for a HW irq belonging to a domain.

like, you hand it a hardware irq that lives inside a domain, and it goes and runs the handler for it. that's the whole job. iconique 🎀

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🌸 SYNOPSIS

int generic_handle_domain_irq (struct irq_domain *domain ,
       irq_hw_number_t hwirq );

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✨ ARGUMENTS

• domain — The domain where to perform the lookup. it's the neighborhood your irq lives in, and we're gonna go find it there 💖
• hwirq — The HW irq number to convert to a logical one. glow-up time for a hardware number, fr fr 🦋

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🔥 RETURN

0 on success, or -EINVAL if conversion has failed.

so like, happy path = 0. if the conversion doesn't work out, you get -EINVAL and honestly? same. 😭

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💜 DESCRIPTION

This function must be called from an IRQ context with irq regs initialized.

okay this part is not a vibe to ignore, bestie — IRQ context, with irq regs initialized. that's the rule. don't be out here calling it from just anywhere, i'm literally begging 🙈

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🌈 SEE ALSO

Kernel file ./kernel/irq/irqdesc.c — and the whole friend group:

• irq_get_nr_irqs(9)
• irq_set_nr_irqs(9)
• generic_handle_irq(9)
• generic_handle_irq_safe(9)
• generic_handle_domain_nmi(9)
• generic_handle_demux_domain_irq(9)
• irq_free_descs(9)
• __irq_alloc_descs(9)
• irq_get_next_irq(9)
• kstat_irqs_cpu(9)
• kstat_irqs_usr(9)

squad's all here, periodt 👑

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and that's the page, bestie 🫶 this little manual moment comes to you from ./kernel/irq, dated October 2026, and it's literally titled generic_handle_domain_irq(9). slay 💅⭐