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Date:   Mon, 28 Feb 2022 10:21:29 -0800
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Stephen Rothwell <sfr@canb.auug.org.au>
Cc:     Matthew Wilcox <willy@infradead.org>,
        Anshuman Khandual <anshuman.khandual@arm.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>
Subject: Re: linux-next: build failure after merge of the akpm-current tree
Message-Id: <20220228102129.9d650474543760f6a1f672fb@linux-foundation.org>
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On Tue, 1 Mar 2022 01:33:08 +1100 Stephen Rothwell <sfr@canb.auug.org.au> wrote:

> Hi all,
> 
> After merging the akpm-current tree, today's linux-next build (powerpc
> ppc64_defconfig) failed like this:
> 
> mm/rmap.c: In function 'try_to_migrate_one':
> mm/rmap.c:1870:64: error: 'page' undeclared (first use in this function)
>  1870 |                                                 compound_order(page));
>       |                                                                ^~~~
> mm/rmap.c:1870:64: note: each undeclared identifier is reported only once for each function it appears in
> 
> Caused by commit
> 
>   e05239e90b65 ("mm/migration: add trace events for base page and HugeTLB migrations")
> 
> inertacting with commit
> 
>   efe8a99f35f6 ("mm/rmap: Convert rmap_walk() to take a folio")
> 
> from the folio tree.
> 
> I have reverted commit e05239e90b65 for today.

Thanks, I've moved yet more things into the post-linux-next queue and
fixed things up.