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Date:   Tue, 28 Jul 2020 18:44:19 -0700
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Randy Dunlap <rdunlap@infradead.org>
Cc:     broonie@kernel.org, linux-fsdevel@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        linux-next@vger.kernel.org, mhocko@suse.cz,
        mm-commits@vger.kernel.org, sfr@canb.auug.org.au
Subject: Re: mmotm 2020-07-27-18-18 uploaded (mm/page_alloc.c)
Message-Id: <20200728184419.4b137162844987c9199542bb@linux-foundation.org>
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On Tue, 28 Jul 2020 15:39:21 -0700 Randy Dunlap <rdunlap@infradead.org> wrote:

> On 7/28/20 2:55 PM, Andrew Morton wrote:
> > On Tue, 28 Jul 2020 05:33:58 -0700 Randy Dunlap <rdunlap@infradead.org> wrote:
> > 
> >> On 7/27/20 6:19 PM, Andrew Morton wrote:
> >>> The mm-of-the-moment snapshot 2020-07-27-18-18 has been uploaded to
> >>>
> >>>    http://www.ozlabs.org/~akpm/mmotm/
> 
> 
> >> on x86_64:
> >>
> >> ../mm/page_alloc.c:8355:48: warning: ‘struct compact_control’ declared inside parameter list will not be visible outside of this definition or declaration
> >>  static int __alloc_contig_migrate_range(struct compact_control *cc,
> >>                                                 ^~~~~~~~~~~~~~~
> > 
> > As is usually the case with your reports, I can't figure out how to
> > reproduce it.  I copy then .config, run `make oldconfig' (need to hit
> > enter a zillion times because the .config is whacky) then the build
> > succeeds.  What's the secret?
> 
> I was not aware that there was a problem. cp .config and make oldconfig
> should be sufficient -- and I don't understand why you would need to hit
> enter many times.
> 
> I repeated this on my system without having to answer any oldconfig prompts
> and still got build errors.
> 
> There is no secret that I know of, but it would be good to get to the
> bottom of this problem.

Well the first thing I hit was

Support for big SMP systems with more than 8 CPUs (X86_BIGSMP) [N/y/?] (NEW) 

and your .config doesn't mention that.

make mrproper
cp ~/config-randy .config
make oldconfig