On Wed, Aug 31, 2016 at 12:47:39AM +0200, Rafael J. Wysocki wrote:
> On Tue, Aug 30, 2016 at 6:49 PM, <jeff.mcgee@xxxxxxxxx> wrote:
> > From: Ankitprasad Sharma <ankitprasad.r.sharma@xxxxxxxxx>
> >
> > Some modules, like i915.ko, needs to detect when certain ACPI features are
> > active inorder to prevent corruption on contended resources.
> > In particular, use of BIOS RapidStart Technology may corrupt the contents of
> > the reserved graphics memory, due to unalarmed hibernation. In which case
> > i915.ko cannot assume that it (reserved gfx memory) remains unmodified and
> > must recreate the contents and importantly not use it to store unrecoverable
> > user data.
>
> The above doesn't explain why you need to export acpi_bus_type at all.
>
> I suspect that this is in order to be able to do some hackish stuff on
> it, so I'm not going to approve this patch as is.
>
My apologies. I was forwarding this collection internally with git send-mail
but didn't scrub the original patch cc list. Please disregard.
> > Signed-off-by: Ankitprasad Sharma <ankitprasad.r.sharma@xxxxxxxxx>
> > Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
> > Cc: Len Brown <lenb@xxxxxxxxxx>
> > Cc: linux-acpi@xxxxxxxxxxxxxxx
> > Cc: linux-kernel@xxxxxxxxxxxxxxx
> > Signed-off-by: Jeff McGee <jeff.mcgee@xxxxxxxxx>
> > ---
> > drivers/acpi/scan.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
> > index 4b22ea8..7461bab 100644
> > --- a/drivers/acpi/scan.c
> > +++ b/drivers/acpi/scan.c
> > @@ -1269,6 +1269,7 @@ struct bus_type acpi_bus_type = {
> > .remove = acpi_device_remove,
> > .uevent = acpi_device_uevent,
> > };
> > +EXPORT_SYMBOL_GPL(acpi_bus_type);
> >
> > static void acpi_device_del(struct acpi_device *device)
> > {
> > --
>
> Thanks,
> Rafael
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