Subject: Re: linux-next: build failure after merge of the mm-hotfixes tree

From: Andrew Morton <[email-masked]>
Date: Thu, 24 Nov 2022 21:24:57 -0800

On Fri, 25 Nov 2022 12:10:51 +1100 Stephen Rothwell <[email-masked]> 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"?