Commit cf4dd800e49d for kernel

commit cf4dd800e49d35d48ebd63d511a6e200f39176f7
Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date:   Fri Jul 24 16:33:14 2026 +0800

    platform/loongarch: laptop: Stop setting acpi_device_class()

    The driver populates acpi_device_class() which is never read afterward,
    so make it stop doing that and drop the symbol defined specifically for
    this purpose.

    No intentional functional impact.

    This change will facilitate the removal of "device_class" from "struct
    acpi_device_pnp" in the future.

    Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
    Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

diff --git a/drivers/platform/loongarch/loongson-laptop.c b/drivers/platform/loongarch/loongson-laptop.c
index 61b18ac206c9..f2dcc6d78051 100644
--- a/drivers/platform/loongarch/loongson-laptop.c
+++ b/drivers/platform/loongarch/loongson-laptop.c
@@ -30,7 +30,6 @@
 #define LOONGSON_ACPI_HKEY_HID	"LOON0000"

 #define ACPI_LAPTOP_NAME "loongson-laptop"
-#define ACPI_LAPTOP_ACPI_EVENT_PREFIX "loongson"

 #define MAX_ACPI_ARGS			3
 #define GENERIC_HOTKEY_MAP_MAX		64
@@ -167,8 +166,6 @@ static int __init setup_acpi_notify(struct generic_sub_driver *sub_driver)
 	}

 	sub_driver->device->driver_data = sub_driver;
-	sprintf(acpi_device_class(sub_driver->device), "%s/%s",
-		ACPI_LAPTOP_ACPI_EVENT_PREFIX, sub_driver->name);

 	status = acpi_install_notify_handler(*sub_driver->handle,
 			sub_driver->type, dispatch_acpi_notify, sub_driver);