On Fri, Jul 2, 2021 at 9:03 AM Aubrey Li <aubrey.li@xxxxxxxxx> wrote: > > Based on _OSC PRM bit, BIOS can choose switch from legacy handling > to using PRM. So if CONFIG_ACPI_PRMT is disabled, this bit should > not be set to let BIOS fall back to the legacy handling (such as SMI). > > Cc: Dan Williams <dan.j.williams@xxxxxxxxx> > Signed-off-by: Aubrey Li <aubrey.li@xxxxxxxxxxxxxxx> > --- > drivers/acpi/bus.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c > index 60fb6a84..30a3d4a 100644 > --- a/drivers/acpi/bus.c > +++ b/drivers/acpi/bus.c > @@ -303,7 +303,9 @@ static void acpi_bus_osc_negotiate_platform_control(void) > > capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; > capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; > +#ifdef CONFIG_ACPI_PRMT > capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PRM_SUPPORT; > +#endif What about using if (IS_ENABLED()) instead of #ifdef? > > #ifdef CONFIG_ARM64 > capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT; > -- > 2.7.4 >
