RE: [PATCH v7 09/10] arm64: efi: Export screen_info

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From: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> Sent: Monday, August 24, 2020 10:35 AM
> 
> On Mon, Aug 24, 2020 at 09:46:22AM -0700, Michael Kelley wrote:
> > The Hyper-V frame buffer driver may be built as a module, and
> > it needs access to screen_info. So export screen_info.
> >
> > Signed-off-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
> > ---
> >  arch/arm64/kernel/efi.c | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c
> > index d0cf596..8ff557a 100644
> > --- a/arch/arm64/kernel/efi.c
> > +++ b/arch/arm64/kernel/efi.c
> > @@ -55,6 +55,7 @@ static __init pteval_t
> create_mapping_protection(efi_memory_desc_t *md)
> >
> >  /* we will fill this structure from the stub, so don't put it in .bss */
> >  struct screen_info screen_info __section(.data);
> > +EXPORT_SYMBOL(screen_info);
> 
> EXPORT_SYMBOL_GPL()?
> 
> I have to ask :)

It's also just EXPORT_SYMBOL(screen_info) in the x86, PowerPC, and Alpha
architectures. I know that doesn't guarantee it's right, but I'll have to defer
to the appropriate subsystem maintainers for whether it really should be
EXPORT_SYMBOL_GPL.

Michael

> 
> thanks,
> 
> greg k-h




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