On Fri, Jul 2, 2021 at 4:02 PM Aubrey Li <aubrey.li@xxxxxxxxxxxxxxx> wrote: > > On 7/2/21 7:37 PM, Rafael J. Wysocki wrote: > > 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? > > aha, sorry, using if (IS_ENABLED()) is better, will come up with a new version soon. No need (see my other reply). Thanks!
