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Date:   Thu, 24 Nov 2022 21:24:57 -0800
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Stephen Rothwell <sfr@canb.auug.org.au>
Cc:     Juergen Gross <jgross@suse.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>,
        "kernelci.org bot" <bot@kernelci.org>
Subject: Re: linux-next: build failure after merge of the mm-hotfixes tree
Message-Id: <20221124212457.06a9928d931d00ad98d7d454@linux-foundation.org>
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On Fri, 25 Nov 2022 12:10:51 +1100 Stephen Rothwell <sfr@canb.auug.org.au> wrote:

> Hi all,
> 
> After merging the mm-hotfixes tree, today's linux-next build (arm
> allmodconfig) failed like this:
> 
> mm/vmscan.c:4090:9: error: implicit declaration of function ‘pmd_young’; did you mean ‘pte_young’? [-Werror=implicit-function-declaration]
> 
> Caused by commit
> 
>   3f85e711d5af ("mm: introduce arch_has_hw_nonleaf_pmd_young()")
> 
> This error was found by the kernel.ci bot and so is still int today's
> tree.

Thanks.  Did that tree include "mm: add dummy pmd_young() for
architectures not having it"?