Hi Christoph,

On Fri, 21 Jun 2019 10:18:36 +0200 Christoph Hellwig <hch@lst.de> wrote:
>
> 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.

Thanks.

-- 
Cheers,
Stephen Rothwell