clear_local_APIC(9)

💅 clear_local_APIC(9) — shutdown the local APIC 💅

okay bestie, welcome to the Kernel API Manual page for clear_local_APIC(9). This function is short, it is iconic, and it shuts down the local APIC. no cap. ✨

🌸 NAME 🌸

clear_local_APIC - shutdown the local APIC

✨ SYNOPSIS ✨

void clear_local_APIC (void );

🫶 ARGUMENTS 🫶

• void — no arguments. literally none, bestie. not a single argument. 💀🫶

🔥 DESCRIPTION 🔥

okay so here’s the vibe: this gets called when a CPU is disabled and before rebooting, so the state of the local APIC has no dangling leftovers. It’s also used to cleanout any BIOS leftovers during boot. very “cleanup crew in a tiny cardigan” energy. 🧹🎀

🦋 SEE ALSO 🦋

Kernel file ./arch/x86/kernel/apic/apic.c — the source file in question, main character energy. 👑

• lapic_get_maxlvt(9)
• apic_soft_disable(9)
• disable_local_APIC(9)
• sync_Arb_IDs(9)
• setup_local_APIC(9)
• init_apic_mappings(9)
• spurious_interrupt(9)
• connect_bsp_APIC(9)
• disconnect_bsp_APIC(9)
• apic_bsp_setup(9)

mwah 💋 signing off from ./arch/x86/kernel/apic, stamped October 2026, with clear_local_APIC(9) energy. 🎀💖