irq_check_status_bit(9)

✨ irq_check_status_bit 💅

okay bestie, welcome to the kernel API manual — this one's a little function from irq_check_status_bit(9) and honestly it's giving "small but mighty" 🎀

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🌸 NAME 🌸

irq_check_status_bit — literally just checks whether bits in the irq descriptor status are set 👀 no cap, that's the whole vibe check.

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🦋 SYNOPSIS 🦋

bool irq_check_status_bit (unsigned int irq , unsigned int bitmask );

yep, that's it. two args, one bool coming back at you 💖

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🎀 ARGUMENTS 🎀

• irq — the linux irq number 🧚 this is the one you're peeking at
• bitmask — the bitmask to evaluate 🌟 like, the actual bits you're asking about

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⭐ RETURN ⭐

Returns True if one of the bits in bitmask is set 🔥 that's the whole answer. if none of them are set you get false, bestie, that's just how it goes 💀

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👑 SEE ALSO 👑

the kernel file is ./kernel/irq/manage.c — go read it, it's iconic 📖✨

and here's the whole friend group of related calls, fr fr:

• synchronize_hardirq(9)
• synchronize_irq(9)
• irq_can_set_affinity(9)
• irq_can_set_affinity_usr(9)
• irq_set_thread_affinity(9)
• irq_affinity_schedule_notify_work(9)
• irq_update_affinity_desc(9)
• irq_set_affinity(9)
• irq_force_affinity(9)
• irq_set_affinity_notifier(9)
• irq_set_vcpu_affinity(9)
• disable_irq_nosync(9)
• disable_irq(9)
• disable_hardirq(9)
• disable_nmi_nosync(9)
• enable_irq(9)
• enable_nmi(9)
• irq_set_irq_wake(9)
• irq_wake_thread(9)
• free_irq(9)
• request_threaded_irq(9)
• request_any_context_irq(9)
• request_nmi(9)
• irq_percpu_is_enabled(9)
• free_percpu_irq(9)
• request_percpu_irq_affinity(9)
• request_percpu_nmi(9)
• prepare_percpu_nmi(9)
• teardown_percpu_nmi(9)
• irq_get_irqchip_state(9)
• irq_set_irqchip_state(9)
• irq_has_action(9)

like, that's a whole squad 🫶 you're gonna want to know them.

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ngl this one's short, but knowing whether those status bits are set is lowkey important, so don't sleep on it 💅

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and that's a wrap, bestie! 🌈 this little pearl comes straight out of the ./kernel/irq corner of the source tree, and the page is dated October 2026 — slay, see you in the next one! 🎀💖🦋