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Date:   Tue, 13 Dec 2022 09:34:24 +0800
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Subject: Re: linux-next: build failure after merge of the mm-hotfixes tree
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To:     Stephen Rothwell <sfr@canb.auug.org.au>,
        Andrew Morton <akpm@linux-foundation.org>
CC:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>
References: <20221213093054.5211da74@canb.auug.org.au>
From:   Kefeng Wang <wangkefeng.wang@huawei.com>
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Hi, this patch relays on Tony Luck's Patch series "Copy-on-write poison 
recovery".[1]
and tested ppc64_defconfig based on next-20221208, it's no build failure

I think it is not very hotfix, also will send v3 to address some comments
we could adjust the patch order in mm tree, thanks.

[1] 
https://lore.kernel.org/all/50506c8a-71c1-9c68-aa47-7e8dc68a3c52@huawei.com/ 


On 2022/12/13 6:30, Stephen Rothwell wrote:
> Hi all,
>
> After merging the mm-hotfixes tree, today's linux-next build (powerpc
> ppc64_defconfig) failed like this:
>
> mm/ksm.c: In function 'ksm_might_need_to_copy':
> mm/ksm.c:2605:21: error: implicit declaration of function 'copy_mc_user_highpage'; did you mean 'copy_user_highpage'? [-Werror=implicit-function-declaration]
>   2605 |                 if (copy_mc_user_highpage(new_page, page, address, vma)) {
>        |                     ^~~~~~~~~~~~~~~~~~~~~
>        |                     copy_user_highpage
>
> Caused by commit
>
>    b7edf4b1cdb1 ("mm: hwpoison: support recovery from ksm_might_need_to_copy()")
>
> I have reverted that commit for today.
>