acpi_ioapic_registered(9)

✨ acpi_ioapic_registered(9) ✨

okay bestie, welcome to the Kernel API Manual 💖 this one's a lil kernel function from acpi_ioapic_registered(9) and honestly it's giving "quick vibe check for your IOAPIC" energy.

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🌸 NAME 🌸

acpi_ioapic_registered — the function that checks whether the IOAPIC tied to @gsi_base has actually been registered 👀✨

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🦋 SYNOPSIS 🦋

int acpi_ioapic_registered (acpi_handle handle , u32 gsi_base );

like. that's the whole call. int in, truth out. slay 💅

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🎀 ARGUMENTS 🎀

• handle — the ACPI handle of the IOAPIC device, iykyk 🫶
• gsi_base — the GSI base that's associated with the IOAPIC, no cap

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💜 DESCRIPTION 💜

okay so here's the tea ☕ — this function assumes the caller is already holding some type of lock to serialize acpi_ioapic_registered with acpi_register_ioapic/acpi_unregister_ioapic. so like, lock it down first, bestie, or the whole thing is gonna be a mess 😭🔒

fr fr — that locking assumption is load-bearing. don't come for this function without your lock. 💀

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🌈 SEE ALSO 🌈

• Kernel file ./arch/x86/kernel/acpi/boot.c — go read it, it ate 👑

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and that's a wrap, bestie 🎀 this page came from source ./arch/x86/kernel/acpi, dated October 2026, stamped by the Kernel API Manual — mwah, iconic, periodt 💅✨🦋