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From: Michael Ellerman <mpe@ellerman.id.au>
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Subject: Re: [PATCH v4 3/5] powerpc/mm: allow memory hotplug into a memoryless node
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Date: Tue, 25 Oct 2016 20:39:45 +1100
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Balbir Singh <bsingharora@gmail.com> writes:
> FYI, these checks were temporary to begin with
>
> I found this in git history
>
> b226e462124522f2f23153daff31c311729dfa2f (powerpc: don't add memory to empty node/zone)

Nice thanks for digging it up.

  commit b226e462124522f2f23153daff31c311729dfa2f
  Author:     Mike Kravetz <kravetz@us.ibm.com>
  AuthorDate: Fri Dec 16 14:30:35 2005 -0800
                                  ^^^^
                                  
That is why maintainers don't like to merge "temporary" patches :)

cheers