__irq_alloc_descs(9)

💖 __irq_alloc_descs — the kernel API manual bestie 💖

okay so this is from the Kernel API Manual, and it's literally the page for __irq_alloc_descs(9) — the function that allocates and initializes a whole range of irq descriptors. no cap, it's giving "reserve my spot" energy for interrupts 💅

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✨ NAME ✨

__irq_alloc_descs — allocate and initialize a range of irq descriptors 🎀

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🌸 SYNOPSIS 🌸

int __ref __irq_alloc_descs (int irq , unsigned int from , unsigned int cnt , int node , struct module *owner , const struct irq_affinity_desc *affinity );

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🦋 ARGUMENTS 🦋

• irq — if irq >= 0, bestie, you're asking it to allocate for that specific irq number 👑
• from — the search starts from this irq number, like "begin the hunt here" 🔥
• cnt — how many consecutive irqs you want allocated. yes, a whole squad of them 🫶
• node — the preferred node where the irq descriptor should be allocated 🌈
• owner — the owning module, and it can be NULL — lowkey optional, iconic behavior 💀
• affinity — optional pointer to an affinity mask array of size cnt; it hints where the irq descriptors should be allocated and which default affinities to use ✨

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💜 DESCRIPTION 💜

Returns the first irq number or an error code. that's the whole vibe — first irq number on success, error code when it's not slaying 😭

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🌟 SEE ALSO 🌟

Kernel file ./kernel/irq/irqdesc.c and also these besties:

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

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and that's the page, bestie 💖 sourced from ./kernel/irq, dated October 2026, and filed under __irq_alloc_descs(9) — periodt 🎀✨