[PATCH v3 4/6] mm: don't export memory_add_physaddr_to_nid in arch specific directory

[Matthew Wilcox]

On Thu, Jul 09, 2020 at 10:06:27AM +0800, Jia He wrote:
> After a general version of __weak memory_add_physaddr_to_nid implemented
> and exported , it is no use exporting twice in arch directory even if
> e,g, ia64/x86 have their specific version.
> 
> This is to suppress the modpost warning:
> WARNING: modpost: vmlinux: 'memory_add_physaddr_to_nid' exported twice.
> Previous export was in vmlinux

It's bad form to introduce a warning and then send a follow-up patch to
fix the warning.  Just fold this patch into patch 1/6.