Re: [PATCH v2 2/3] memory: export symbols for memory related functions

["Wei-chin Tsai (蔡維晉)" <Wei-chin.Tsai@mediatek.com>]

On Wed, 2023-06-14 at 08:16 +0100, Russell King (Oracle) wrote:
>  	 
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>  On Wed, Jun 14, 2023 at 11:20:34AM +0800, Wei Chin Tsai wrote:
> > diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
> > index 0e8ff85890ad..df91412a1069 100644
> > --- a/arch/arm/kernel/process.c
> > +++ b/arch/arm/kernel/process.c
> > @@ -343,6 +343,7 @@ const char *arch_vma_name(struct vm_area_struct
> *vma)
> >  {
> >  return is_gate_vma(vma) ? "[vectors]" : NULL;
> >  }
> > +EXPORT_SYMBOL_GPL(arch_vma_name);
> ...
> > diff --git a/kernel/signal.c b/kernel/signal.c
> > index b5370fe5c198..a1abe77fcdc3 100644
> > --- a/kernel/signal.c
> > +++ b/kernel/signal.c
> > @@ -4700,6 +4700,7 @@ __weak const char *arch_vma_name(struct
> vm_area_struct *vma)
> >  {
> >  return NULL;
> >  }
> > +EXPORT_SYMBOL_GPL(arch_vma_name);
> 
> Have you confirmed:
> 1) whether this actually builds
> 2) whether this results in one or two arch_vma_name exports
> 
> ?
> 
> -- 
> RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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Hi Russell,

We did confirm that it can be built successfully in kernel 6.1 and run
well in our system.

Actually, we only use this export symbol "arch_vma_name"
from kernel/signal.c in arm64. We also export symbol for arch_vma_name
in arch/arm/kernel/process.c because that, one day in the future,  we
are afraid that we also need this function in arm platform.

Thanks.

Regards,

Jim