remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);  
acpi_button_exit (void){	ACPI_FUNCTION_TRACE("acpi_button_exit");	acpi_bus_unregister_driver(&acpi_button_driver);	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);	return_VOID;}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/bd4698dad3023ae137b366c736e29ca6eaf3b9f7/button.c/buggy/drivers/acpi/button.c