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SubjectRe: [PATCH 2/2 -tip] drm/i915: intel_lvds.c fix section mismatch warning
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On Thu, 2009-05-28 at 11:00 -0400, Jarod Wilson wrote:
> On Wednesday 20 May 2009 02:27:35 Jaswinder Singh Rajput wrote:
> >
> > intel_no_lvds[] does not require __initdata as it is used only by :
> >
> > void intel_lvds_init(struct drm_device *dev)
> >
> > fixes section mismatch warning:
> >
> > WARNING: drivers/gpu/drm/i915/i915.o(.text+0xf3c5): Section mismatch in reference from the function intel_lvds_init() to the variable .init.data:intel_no_lvds
> > The function intel_lvds_init() references
> > the variable __initdata intel_no_lvds.
> > This is often because intel_lvds_init lacks a __initdata
>
> This would seem to suggest __initdata should be added to
> intel_lvds_init, rather than removed from intel_no_lvds...
>

The complete statement is :

WARNING: drivers/gpu/drm/i915/i915.o(.text+0xf3c5): Section mismatch in reference from the function intel_lvds_init() to the variable .init.data:intel_no_lvds
The function intel_lvds_init() references
the variable __initdata intel_no_lvds.
This is often because intel_lvds_init lacks a __initdata
annotation or the annotation of intel_no_lvds is wrong.

> But I suppose either one would work. Apologies for not
> catching the initial mismatch... :\
>

No another way it will not work.

As intel_no_lvds is used by intel_lvds_init and dmi_check_system.

We can not set intel_lvds_init as intel_lvds_init is used by :
static void intel_setup_outputs(struct drm_device *dev)

We can not set dmi_check_system to __init as it is also exported.

So the only option is to remove __initdata.

It seems the first patch : "[PATCH 1/2 -tip] drm/i915: acpi/video.c fix
section mismatch warning" is applied in acpi tree by Len Brown.

I am not sure where this patch should go.

So I am also mailing to Andrew and Dave, it they find this useful then
they can add in their tree.

> > Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
> > ---
> > drivers/gpu/drm/i915/intel_lvds.c | 2 +-
> > 1 files changed, 1 insertions(+), 1 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
> > index 439a865..5ffadf9 100644
> > --- a/drivers/gpu/drm/i915/intel_lvds.c
> > +++ b/drivers/gpu/drm/i915/intel_lvds.c
> > @@ -391,7 +391,7 @@ static int __init intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
> > }
> >
> > /* These systems claim to have LVDS, but really don't */
> > -static const struct dmi_system_id __initdata intel_no_lvds[] = {
> > +static const struct dmi_system_id intel_no_lvds[] = {
> > {
> > .callback = intel_no_lvds_dmi_callback,
> > .ident = "Apple Mac Mini (Core series)",
>
>



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