irq_free_descs(9)

💅 irq_free_descs — a lil' kernel API manual moment 💅

okay so bestie, welcome to the Kernel API Manual, section 9 (that's the kernel-functions girlies, iykyk 🧚). today's main character is irq_free_descs and honestly? she's giving cleanup crew energy. let's get into it ✨

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🌸 NAME 🌸

irq_free_descs — literally frees irq descriptors. that's it. that's the whole vibe. 💖

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🎀 SYNOPSIS 🎀

void irq_free_descs (unsigned int from , unsigned int cnt );

no cap, that's the entire signature — she returns void, so don't be out here expecting a return value, because there isn't one, periodt. 🫶

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🦋 ARGUMENTS 🦋

• from — the start of the descriptor range. like, where the little range begins. that's her whole job bestie 💅
• cnt — the number of consecutive irqs to free. consecutive!! as in back-to-back, in a row, no gaps. count 'em and hand 'em over 🎀

lowkey important: from is the start and cnt is the count of consecutive ones — so like, it's a range, not a random grab-bag. don't come for me, it's right there in the manual 😭

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⭐ SEE ALSO ⭐

okay this is the friend group, the whole squad, the it-list 👑 — and every single one of them is a legit kernel file reference from ./kernel/irq/irqdesc.c, so let's give them their moment:

• 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_alloc_descs(9)
• irq_get_next_irq(9)
• kstat_irqs_cpu(9)
• kstat_irqs_usr(9)

like, look at that roster. obsessed. 🌈 (and yeah, the kernel file that lives at ./kernel/irq/irqdesc.c is where all this descs drama goes down 🍓)

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💜 cute lil sign-off 💜

this icon of a page comes to you straight from the source at ./kernel/irq, dated October 2026 — so go free those descriptors responsibly, bestie. slay, stay iconic, and may your cnt always be consecutive 💖✨🎀🦋🌸💅🫶