wmidev_evaluate_method(9)

📦 version 7.3.1, in nixpkgs unstable

okay bestie 💖 you've landed on the wmidev_evaluate_method(9) page from the Kernel API Manual, and this one is giving “deprecated but still in the group chat” energy. Let’s get into it.

✨ NAME ✨

wmidev_evaluate_method — Evaluate a WMI method (deprecated) 👑

🦋 SYNOPSIS 🦋

acpi_status wmidev_evaluate_method (struct wmi_device *wdev , u8
       instance , u32 method_id , const struct acpi_buffer *in , struct
       acpi_buffer *out );

🎀 ARGUMENTS 🎀

  • wdev — a wmi bus device from a driver 🫶
  • instance — the instance index, bestie
  • method_id — the method ID to call
  • in — a mandatory buffer containing input for the method call
  • out — an empty buffer to return the method results

💅 DESCRIPTION 💅

Call an ACPI-WMI method. And listen: the caller must free out. That part is not optional, no cap 😭

⚠️ Also, heads up: this function is deprecated. It says so right in the NAME section, so don’t act surprised 💀

🌈 RETURN 🌈

acpi_status signaling success or error. That’s the vibe check: success or error, periodt.

💜 SEE ALSO 💜

Kernel file ./drivers/platform/wmi/core.c — and yes, there’s a whole friend group to go peek at: wmi_instance_count(9), wmidev_instance_count(9), wmi_evaluate_method(9), wmidev_invoke_method(9), wmidev_invoke_procedure(9), wmi_query_block(9), wmidev_block_query(9), wmidev_query_block(9), wmi_set_block(9), wmidev_block_set(9), wmidev_set_block(9), wmi_install_notify_handler(9), wmi_remove_notify_handler(9), wmi_has_guid(9), wmi_get_acpi_device_uid(9), wmi_driver_unregister(9) 🌸

mwah 💋 — source/version: ./drivers/platform/wmi, date: October 2026 🎀

📦 where this page comes from