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Date:   Fri, 21 Jun 2019 10:18:36 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Stephen Rothwell <sfr@canb.auug.org.au>
Cc:     Jens Axboe <axboe@kernel.dk>,
        Linux Next Mailing List <linux-next@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Christoph Hellwig <hch@lst.de>
Subject: Re: linux-next: build failure after merge of the block tree
Message-ID: <20190621081836.GB17718@lst.de>
References: <20190621135616.20299058@canb.auug.org.au>
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On Fri, Jun 21, 2019 at 01:56:16PM +1000, Stephen Rothwell wrote:
> Hi Jens,
> 
> After merging the block tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
> 
> ERROR: "css_next_descendant_pre" [block/bfq.ko] undefined!

I think the culprit is "bfq-iosched: move bfq_stat_recursive_sum into the only
caller" as that starts using css_next_descendant_pre in bfq.

I'll send a patch to export it.