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

[Christoph Hellwig]

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.