linux-kernel - Re: linux-next: build failure after merge of the block tree

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Message-ID: <20190621081836.GB17718@lst.de>
Date:   Fri, 21 Jun 2019 10:18:36 +0200
From:   Christoph Hellwig <hch@....de>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Jens Axboe <axboe@...nel.dk>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Christoph Hellwig <hch@....de>
Subject: Re: linux-next: build failure after merge of the block tree

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.