From: Adrian Bunk Make the needlessly global acpi_bus_type static. I'd also suggest to rename this struct, since although it's named acpi_bus_type, it's of type "struct bus_type", not "struct acpi_bus_type" as defined in include/acpi/acpi_bus.h . Signed-off-by: Adrian Bunk Signed-off-by: Andrew Morton --- drivers/acpi/scan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -puN drivers/acpi/scan.c~drivers-acpi-scanc-make-acpi_bus_type-static drivers/acpi/scan.c --- a/drivers/acpi/scan.c~drivers-acpi-scanc-make-acpi_bus_type-static +++ a/drivers/acpi/scan.c @@ -1450,7 +1450,7 @@ static int acpi_device_resume(struct dev } -struct bus_type acpi_bus_type = { +static struct bus_type acpi_bus_type = { .name = "acpi", .suspend = acpi_device_suspend, .resume = acpi_device_resume, _