acpi_early_init(9)

🌸 NAME 🌸

okay bestie, welcome to acpi_early_init(9) from the Kernel API Manual 💖 — acpi_early_init does exactly this: initialize ACPICA and populate the ACPI namespace. ✨

✨ SYNOPSIS ✨

void acpi_early_init (void );

🎀 ARGUMENTS 🎀

• void — no arguments. That's it, bestie. 💅

🦋 DESCRIPTION 🦋

Okay so after this, the ACPI tables are accessible — yes ma'am ✨ — but the handling of events has not been initialized and the global lock is not available yet, so AML should not be executed at this point. Periodt. 🚫

Doing this before switching the EFI runtime services to virtual mode allows the EfiBootServices memory to be freed slightly earlier on boot. Cute little boot-time detail, no cap. 🎀

💖 SEE ALSO 💖

Kernel file: ./drivers/acpi/bus.c

• acpi_bus_notify(9)
• devm_acpi_install_notify_handler(9)
• acpi_bus_get_primary_device(9)
• acpi_get_first_physical_node(9)
• acpi_device_is_first_physical_node(9)
• acpi_of_match_device(9)
• acpi_set_modalias(9)
• acpi_match_acpi_device(9)
• acpi_match_device(9)
• acpi_bus_find_device_by_name(9)
• acpi_subsystem_init(9)

mwah 💋 — this cutie comes from ./drivers/acpi, dated October 2026, and the page is acpi_early_init(9). Byeee! 🫶✨