[Intel-gfx] [PATCH 1/2] ACPI: utils: Add acpi_reduced_hardware() helper

[Rafael J. Wysocki]

On Wed, Apr 7, 2021 at 7:43 PM Hans de Goede <hdegoede at redhat.com> wrote:
>
> Hi,
>
> On 4/7/21 7:13 PM, Rafael J. Wysocki wrote:
> > On Tue, Apr 6, 2021 at 11:17 PM Hans de Goede <hdegoede at redhat.com> wrote:
> >>
> >> Add a getter for the acpi_gbl_reduced_hardware variable so that modules
> >> can check if they are running on an ACPI reduced-hw platform or not.
> >>
> >> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
> >> ---
> >>  drivers/acpi/utils.c    | 11 +++++++++++
> >>  include/acpi/acpi_bus.h |  1 +
> >>  include/linux/acpi.h    |  5 +++++
> >>  3 files changed, 17 insertions(+)
> >>
> >> diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
> >> index 682edd913b3b..4cb061d3169a 100644
> >> --- a/drivers/acpi/utils.c
> >> +++ b/drivers/acpi/utils.c
> >> @@ -872,6 +872,17 @@ acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv)
> >>  }
> >>  EXPORT_SYMBOL(acpi_dev_get_first_match_dev);
> >>
> >> +/**
> >> + * acpi_reduced_hardware - Return if this is an ACPI-reduced-hw machine
> >> + *
> >> + * Return true when running on an ACPI-reduced-hw machine, false otherwise.
> >> + */
> >> +bool acpi_reduced_hardware(void)
> >> +{
> >> +       return acpi_gbl_reduced_hardware;
> >> +}
> >> +EXPORT_SYMBOL(acpi_reduced_hardware);
> >
> > EXPORT_SYMBOL_GPL()?
>
> Yes, that was my intention, no idea what happened here.
>
> Before I send a v2, do you have any remarks on patch 2/2 (which is actually
> the more interesting patch) ?

I thought that basing that check on the ACPICA's global variable may
be too coarse grained for some cases, but then I've decided to do it
as is now and we'll see.

No need to resend that one.